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IBM System Storage DS4700 Express Storage Subsystem
ꢀꢁꢂ
Installation, User’s and Maintenance Guide
GC26-7843-05
Download from Www.Somanuals.com. All Manuals Search And Download.
IBM System Storage DS4700 Express Storage Subsystem
ꢀꢁꢂ
Installation, User’s and Maintenance Guide
GC26-7843-05
Download from Www.Somanuals.com. All Manuals Search And Download.
Note:
Before using this information and the product it supports, be sure to read the general information in the “Safety” on page xv
Sixth Edition (November 2011)
© Copyright IBM Corporation 2010.
US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.
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Contents
© Copyright IBM Corp. 2010
iii
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iv IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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Contents
v
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vi IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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Contents vii
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viii IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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x
IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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Figures xi
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xii IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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xiv IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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Safety
The caution and danger statements that this document contains can be referenced
in the multilingual IBM® Safety Information document that is provided with your IBM
System Storage® DS4700 Express Storage Subsystem. Each caution and danger
statement is numbered for easy reference to the corresponding statements in the
translated document.
v Danger: These statements indicate situations that can be potentially lethal or
extremely hazardous to you. A danger statement is placed just before the
description of a potentially lethal or extremely hazardous procedure, step, or
situation.
v Caution: These statements indicate situations that can be potentially hazardous
to you. A caution statement is placed just before the description of a potentially
hazardous procedure step or situation.
v Attention: These notices indicate possible damage to programs, devices, or
data. An attention notice is placed just before the instruction or situation in which
damage could occur.
Before installing this product, read the following danger and caution notices.
Statement 1:
© Copyright IBM Corp. 2010
xv
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DANGER
Electrical current from power, telephone, and communication cables is
hazardous.
To avoid a shock hazard:
v Do not connect or disconnect any cables or perform installation,
maintenance, or reconfiguration of this product during an electrical
storm.
v Connect all power cords to a properly wired and grounded electrical
outlet.
v Connect to properly wired outlets any equipment that will be attached to
this product.
v When possible, use one hand only to connect or disconnect signal
cables.
v Never turn on any equipment when there is evidence of fire, water, or
structural damage.
v Disconnect the attached power cords, telecommunications systems,
networks, and modems before you open the device covers, unless
instructed otherwise in the installation and configuration procedures.
v Connect and disconnect cables as described in the following table when
installing, moving, or opening covers on this product or attached
devices.
To Connect:
To Disconnect:
1. Turn everything OFF.
1. Turn everything OFF.
2. First, attach all cables to devices.
3. Attach signal cables to connectors.
4. Attach power cords to outlet.
5. Turn device ON.
2. First, remove power cords from outlet.
3. Remove signal cables from connectors.
4. Remove all cables from devices.
Statement 2:
CAUTION:
When replacing the lithium battery, use only an equivalent type battery
recommended by the manufacturer. If your system has a module containing a
lithium battery, replace it only with the same module type made by the same
manufacturer. The battery contains lithium and can explode if not properly
used, handled, or disposed of.
Do not:
v Throw or immerse into water
v Heat to more than 100° C (212° F)
v Repair or disassemble
Dispose of the battery as required by local ordinances or regulations.
Statement 3:
xvi IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:
v Do not remove the covers. Removing the covers of the laser product could
result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.
v Use of controls or adjustments or performance of procedures other than
those specified herein might result in hazardous radiation exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser
diode. Note the following.
Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.
Class 1 Laser statement
Class 1 Laser Product
Laser Klasse 1
Laser Klass 1
Luokan 1 Laserlaite
Apparell À Laser de Calsse 1
IEC 825-11993 CENELEC EN 60 825
Statement 4:
≥ 18 kg (39.7 lb)
≥ 32 kg (70.5 lb)
≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
Safety xvii
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Statement 5:
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
2
1
Statement 8:
CAUTION:
Never remove the cover on a power supply or any part that has the following
label attached.
Hazardous voltage, current, and energy levels are present inside any
component that has this label attached. There are no serviceable parts inside
these components. If you suspect a problem with one of these parts, contact
a service technician.
Statement 29:
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CAUTION:
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment.
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment. If this
connection is made, all of the following conditions must be met:
v This equipment shall be connected directly to the dc supply system
earthing electrode conductor or to a bonding jumper from an earthing
terminal bar or bus to which the dc supply system earthing electrode
conductor is connected.
v This equipment shall be located in the same immediate area (such as,
adjacent cabinets) as any other equipment that has a connection between
the earthed conductor of the same dc supply circuit and the earthing
conductor, and also the point of earthing of the dc system. The dc system
shall not be earthed elsewhere.
v The dc supply source shall be located within the same premises as this
equipment.
v Switching or disconnecting devices shall not be in the earthed circuit
conductor between the dc source and the point of connection of the
earthing electrode conductor.
Statement 30:
CAUTION:
To reduce the risk of electric shock or energy hazards:
v This equipment must be installed by trained service personnel in a
restricted-access location, as defined by the NEC and IEC 60950-1, First
Edition, The Standard for Safety of Information Technology Equipment.
v Connect the equipment to a reliably grounded safety extra low voltage
(SELV) source. An SELV source is a secondary circuit that is designed so
that normal and single fault conditions do not cause the voltages to exceed
a safe level (60 V direct current).
v The branch circuit overcurrent protection must be rated 20 A.
v Use 12 American Wire Gauge (AWG) or 2.5 mm2 copper conductor only, not
exceeding 4.5 meters in length.
v Incorporate a readily available approved and rated disconnect device in the
field wiring.
CAUTION:
This unit has more than one power source. To remove all power from the unit,
all dc MAINS must be disconnected.
Safety xix
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Cable Warning:
WARNING: Handling the cord on this product or cords associated with accessories
sold with this product, will expose you to lead, a chemical known to the State of
California to cause cancer, and birth defects or other reproductive harm. Wash
hands after handling.
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About this document
This document provides instructions for installing and customizing the configuration
of your IBM System Storage DS4700 Express Storage Subsystem. It also provides
maintenance procedures and troubleshooting information.
Who should read this document
This document is intended for system operators and service technicians who have
extensive knowledge of Fibre Channel and network technology.
How this document is organized
Chapter 1, “Introduction,” on page 1 describes the IBM System Storage DS4700
Express Storage Subsystem. This chapter includes an inventory checklist and an
overview of the storage subsystem features, operating specifications, and
components.
Chapter 2, “Installing the storage subsystem,” on page 31 contains information on
how to install the DS4700 Express Storage Subsystem in a standard rack cabinet
and setting the interface options.
Chapter 3, “Cabling the storage subsystem,” on page 55 contains fibre channel and
power cabling information for the DS4700 Express Storage Subsystem.
Chapter 4, “Operating the storage subsystem,” on page 117 contains information on
how to power on and off the DS4700 Express Storage Subsystem, recover from an
overheated power supply and fan unit, troubleshoot, and interpret LEDs.
Chapter 5, “Replacing components,” on page 145 contains step-by-step instructions
about how to install or remove customer replaceable units (CRUs), such as
Enhanced Disk Drive Modules (E-DDMs), power supply and fan units, RAID
controllers, battery units, bezels, filter and filter retainer, midplane, and SFP
modules.
Chapter 6, “Hardware maintenance,” on page 183 describes problems and
symptoms that are specific to the DS4700 Express Storage Subsystem. It also
provides a parts list for the DS4700 Express Storage Subsystem.
Appendix A, “Records,” on page 191 provides a table that you can use to record
and update important information about your DS4700 Express Storage Subsystem,
including serial number and device records.
Appendix B, “Rack mounting template,” on page 195 provides the rack mounting
templates for installation of the DS4700 Express Storage Subsystem. If you want to
tear out the templates from the document for use during installation, use these
copies of the templates.
Appendix C, “Power cords,” on page 199 lists power cord information for the
DS4700 Express Storage Subsystem.
Appendix D, “Additional DS4000 documentation,” on page 203 lists additional
DS4000 documents.
© Copyright IBM Corp. 2010
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Appendix E, “Accessibility,” on page 213 details accessibility information.
DS4000 Storage Subsystem installation tasks - General overview
are common to most DS4000 configurations. When you install and configure your
DS4000 storage subsystem, refer to this table to find the documentation that
explains how to complete each task.
Table 1. Where to find DS4000 installation and configuration procedures
Installation task
Where to find information or procedures
1
Plan the installation
v
v
DS4000 Storage Manager Concepts Guide
DS4000 Storage Manager Installation and Host Support
Guide for AIX, HP-UX, Solaris, and Linux on POWER
v
DS4000 Storage Manager Installation and Host Support
Guide for Windows 2000/Server 2003/2008, NetWare,
VMWare ESX Server, and Linux
v
v
v
v
v
v
v
v
v
DS4100 Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4300 Storage Subsystem Installation, User's, and
Maintenance Guide
DS4400 Fibre Channel Storage Server Installation and
Support Guide
DS4500 Storage Subsystem Installation, User's, and
Maintenance Guide
DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4800
DS4800 Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4700 and DS4200, Sections 2, 3, and 4 also for
installing the EXP810 and EXP420
2
Mount the DS4000
storage subsystem in
the rack
v
v
v
v
DS4800 Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4800
DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4700 and DS4200, Sections 2, 3, and 4 also for
installing the EXP810 and EXP420
v
v
v
DS4400 and DS4500 Rack Mounting Instructions
DS4300 Rack Mounting Instructions
DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
v
DS4100 Storage Subsystem Installation, User’s and
Maintenance Guide
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Table 1. Where to find DS4000 installation and configuration procedures (continued)
Installation task
Where to find information or procedures
3
Mount the DS4000
EXP storage
expansion unit in the
rack
v
v
v
v
DS4000 EXP100 Storage Expansion Unit Installation, User’s
and Maintenance Guide
DS4000 EXP420 Storage Expansion Enclosures Installation,
User’s, and Maintenance Guide
DS4000 EXP700 and EXP710 Storage Expansion Enclosures
Installation, User’s, and Maintenance Guide
DS4000 EXP810 Storage Expansion Enclosures Installation,
User’s, and Maintenance Guide
v
v
FAStT EXP500 Installation and User’s Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4700 and DS4200, Sections 2, 3, and 4 also for
installing the EXP810 and EXP420
4
Route the storage
expansion unit fibre
channel cables
v
v
v
DS4100 Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4300 Storage Subsystem Installation, User’s, and
Maintenance Guide
v
v
DS4400 Fibre Channel Cabling Instructions
DS4500 Storage Subsystem Installation, User’s, and
Maintenance Guide
v
v
DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4700 and DS4200, Sections 2, 3, and 4 also for
installing the EXP810 and EXP420
v
v
DS4800 Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4800
5
Route the host
server fibre channel
cables
v
v
v
DS4100 Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4300 Storage Subsystem Installation, User’s, and
Maintenance Guide
v
v
DS4400 Fibre Channel Cabling Instructions
DS4500 Storage Subsystem Installation, User’s, and
Maintenance Guide
v
v
DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4700 and DS4200, Sections 2, 3, and 4 also for
installing the EXP810 and EXP420
v
v
DS4800 Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4800
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Table 1. Where to find DS4000 installation and configuration procedures (continued)
Installation task
Where to find information or procedures
6
7
8
Power up the
subsystem
v
v
v
v
v
v
v
DS4100 Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4300 Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4400 Fibre Channel Storage Server Installation and
Support Guide
DS4500 Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4700 and DS4200, Sections 2, 3, and 4 also for
installing the EXP810 and EXP420
v
v
DS4800 Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4800
Configure DS4000
network settings
v
v
v
v
v
v
v
DS4100 Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4300 Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4400 Fibre Channel Storage Server Installation and
Support Guide
DS4500 Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4700 and DS4200, Sections 2, 3, and 4 also for
installing the EXP810 and EXP420
v
v
DS4800 Storage Subsystem Installation, User’s, and
Maintenance Guide
IBM System Storage Quick Start Guide, Quick reference for
the DS4800
Zone the fabric
switch
(SAN-attached only)
v
v
DS4000 Storage Manager Installation and Host Support
Guide for AIX, HP-UX, Solaris, and Linux on POWER
DS4000 Storage Manager Installation and Host Guide for
Windows 2000/Server 2003/2008, NetWare, VMWare ESX
Server, and Linux
v
DS4000 Storage Manager Copy Services Guide (describes
switch zoning for the Remote Mirror Option)
v See also the documentation provided by the switch
manufacturer.
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Table 1. Where to find DS4000 installation and configuration procedures (continued)
Installation task
Where to find information or procedures
9
Install DS4000
v
v
DS4000 Storage Manager Installation and Host Support
Guide for AIX, HP-UX, Solaris, and Linux on POWER
Storage Manager
software on the
management station
DS4000 Storage Manager Installation and Host Support
Guide for Windows 2000/Server 2003/2008, NetWare,
VMWare ESX Server, and Linux
10 Install host software
(failover drivers) on
host server
v
v
IBM System Storage Quick Start Guide, Quick reference for
the DS4700 and DS4200, Sections 2, 3, and 4 also for
installing the EXP810 and EXP420
11 Start DS4000
Storage Manager
IBM System Storage Quick Start Guide, Quick reference for
the DS4800
12 Set the DS4000
Storage Manager
clock
v DS4000 Storage Manager online help (for post-installation
tasks)
13 Set the DS4000
Storage Manager
host default type
14 Verify DS4000
v
v
v
v
v
v
v
DS4100 Storage Subsystem Installation, User’s, and
Maintenance Guide
subsystem health
DS4200 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4300 Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4400 Fibre Channel Storage Server Installation and
Support Guide
DS4500 Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4700 Express Storage Subsystem Installation, User’s, and
Maintenance Guide
DS4800 Storage Subsystem Installation, User’s, and
Maintenance Guide
15 Enable DS4000
Storage Manager
premium feature
keys
Copy Services premium features
DS4000 Storage Manager Copy Services Guide
FC/SATA Intermix premium feature
DS4000 Fibre Channel and Serial ATA Intermix
Premium Feature Installation Overview
Storage Partitioning (and general premium features
information)
v
v
DS4000 Storage Manager Concepts Guide
DS4000 Storage Manager Installation and Host
Support Guide for AIX, HP-UX, Solaris, and Linux on
POWER
v
DS4000 Storage Manager Installation and Host
Support Guide for Windows 2000/Server 2003/2008,
NetWare, VMWare ESX Server, and Linux
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Table 1. Where to find DS4000 installation and configuration procedures (continued)
Installation task
Where to find information or procedures
16 Configure arrays and
v
v
DS4000 Storage Manager Installation and Host Support
Guide for AIX, HP-UX, Solaris, and Linux on POWER
logical drives
17 Configure host
DS4000 Storage Manager Installation and Host Support
Guide for Windows 2000/Server 2003/2008, NetWare,
VMWare ESX Server, and Linux
partitions
18 Verify host access to
v
v
IBM System Storage Quick Start Guide, Quick reference for
the DS4700 and DS4200, Sections 2, 3, and 4 also for
installing the EXP810 and EXP420
DS4000 storage
IBM System Storage Quick Start Guide, Quick reference for
the DS4800
v DS4000 Storage Manager online help
Getting information, help, and service
If you need help, service, or technical assistance or just want more information
about IBM products, you will find a wide variety of sources available from IBM to
assist you. This section contains information about where to go for additional
information about IBM and IBM products, what to do if you experience a problem
with your system, and whom to call for service, if it is necessary.
Before you call
Before you call, take these steps to try to solve the problem yourself:
v Check all cables to make sure that they are connected.
v Check the power switches to make sure that the system is turned on.
v Use the troubleshooting information in your system documentation, and use the
diagnostic tools that come with your system.
v Check for technical information, hints, tips, and new device drivers at the IBM
support Web site pages that are listed in this section.
v Use an IBM discussion forum on the IBM Web site to ask questions.
You can solve many problems without outside assistance by following the
troubleshooting procedures that IBM provides in the DS4000 Storage Manager
online help or in the documents that are provided with your system and software.
The information that comes with your system also describes the diagnostic tests
that you can perform. Most subsystems, operating systems, and programs come
with information that contains troubleshooting procedures and explanations of error
messages and error codes. If you suspect a software problem, see the information
for the operating system or program.
Using the documentation
Information about your IBM system and preinstalled software, if any, is available in
the documents that come with your system. This includes printed books, online
documents, readme files, and help files. See the troubleshooting information in your
system documentation for instructions for using the diagnostic programs. The
troubleshooting information or the diagnostic programs might tell you that you need
additional or updated device drivers or other software.
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Finding DS4000 readme files
1. Go to the following Web site:
2. Click the link for your Storage Subsystem (for example, DS4800).
3. When the subsystem support page opens, click the Download tab.
4. Under the Download tab, click Storage Manager, firmware, HBA, tools,
support & pubs (including readmes).
5. Now, click the appropriate tab for the type of readme file that you are looking
for:
v Firmware
v Storage Mgr
v HBA
v Tools
A table displays as you click each tab.
6. In the table, click on the appropriate link in the Current version and readmes
column.
7. Click the link for the readme file.
Web sites
The most up-to-date information about DS4000 storage subsystems and DS4000
Storage Manager, including documentation and the most recent software, firmware,
and NVSRAM downloads, can be found at the following Web sites.
DS4000 Midrange Disk Systems
Find the latest information about IBM System Storage disk storage systems,
including all of the DS4000 storage subsystems:
IBM System Storage products
Find information about all IBM System Storage products:
Support for IBM System Storage disk storage systems
Find links to support pages for all IBM System Storage disk storage
systems, including DS4000 storage subsystems and expansion units:
System Storage DS4000 interoperability matrix
Find the latest information about operating system and HBA support,
clustering support, storage area network (SAN) fabric support, and DS4000
Storage Manager feature support:
Storage Area Network (SAN) support
Find information about using SAN switches, including links to user guides
and other documents:
DS4000 technical support
Find downloads, hints and tips, documentation, parts information, HBA and
Fibre Channel support:
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Select your Storage Subsystem (for example, DS4800).
Premium feature activation
Activate a DS4000® premium feature by using the online tool:
IBM publications center
Find IBM publications:
Support for System p® servers
Find the latest information supporting System p AIX® and Linux servers:
Support for System x® servers
Find the latest information supporting System x Intel- and AMD-based
servers:
Fix delivery center for AIX and Linux on POWER®
Find the latest AIX and Linux on POWER information and downloads:
In the Product family drop-down menu, select UNIX servers. Then select
your product and fix type from the subsequent drop-down menus.
Eserver System p and AIX information center
Find everything you need to know about using AIX with System p and
POWER servers:
Software service and support
Through IBM Support Line, for a fee you can get telephone assistance with usage,
configuration, and software problems. For information about which products are
supported by Support Line in your country or region, go to the following Web site:
For more information about the IBM Support Line and other IBM services, go to the
following Web sites:
Hardware service and support
You can receive hardware service through IBM Integrated Technology Services or
through your IBM reseller, if your reseller is authorized by IBM to provide warranty
service. Go to the following Web site for support telephone numbers:
xxviii IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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In the U.S. and Canada, hardware service and support is available 24 hours a day,
7 days a week. In the U.K., these services are available Monday through Friday,
from 9 a.m. to 6 p.m.
Fire suppression systems
A fire suppression system is the responsibility of the customer. The customer's own
insurance underwriter, local fire marshal, or a local building inspector, or both,
should be consulted in selecting a fire suppression system that provides the correct
level of coverage and protection. IBM designs and manufactures equipment to
internal and external standards that require certain environments for reliable
operation. Because IBM does not test any equipment for compatibility with fire
suppression systems, IBM does not make compatibility claims of any kind nor does
IBM provide recommendations on fire suppression systems.
How to send your comments
Your feedback is important to help us provide the highest quality information. If you
have any comments about this document, you can submit them in one of the
following ways:
E-mail
Submit your comments by e-mail to:
Be sure to include the name and order number of the document and, if
applicable, the specific location of the text that you are commenting on,
such as a page number or table number.
Mail
Fill out the Readers' Comments form (RCF) at the back of this document
and return it by mail or give it to an IBM representative.
If the RCF has been removed, send your comments to:
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Be sure to include the name and order number of the document and, if
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such as a page number or table number.
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xxx IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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Chapter 1. Introduction
This chapter describes the operating specifications, features, and components for
the IBM System Storage DS4700 Express Storage Subsystem (hereafter referred to
as DS4700 or storage subsystem).
This chapter also includes an inventory checklist and important information on best
practices guidelines and product updates for your DS4700 Express.
Overview
IBM DS4000 solutions support the large and growing data storage requirements of
business-critical applications. These scalable IBM DS4000 solutions offer you data
access and protection to meet your existing enterprise storage requirements and
prepare for the future.
The IBM System Storage DS4700 Express Storage Subsystem (Machine Type
1814, Models 70A, 70H, 70S, 70T, 72A, 72H, 72S, and 72T) is designed to provide
solutions to meet the needs of midrange/departmental storage requirements,
delivering high performance, advanced function, high availability, modular and
scalable storage capacity, with SAN-attached 4-Gbps Fibre Channel (FC)
connectivity, and support for RAID levels 0, 1, 3, 5, and 6 up to over 33 terabytes
(TB) when using 300 GB hard drives and up to 56 TB when using 500 GB SATA
Enhanced Disk Drive Modules (E-DDMs).
A 3-U rack-mountable enclosure houses the DS4700 Express redundant,
dual-active RAID controllers with up to six fibre-channel ports per controller for
attachment of host servers and DS4000 storage expansion enclosures and up to 16
4-Gbps fibre channel or SATA E-DDMs.
The DS4700 Express supports attachment of up to six EXP810, EXP710, or
EXP100 storage expansion enclosures, resulting in the capability to connect up to
112 disk drives and enabling storage configurations of over 33 TB using 300 GB
fibre channel E-DDMs or 56 TB using 500 GB SATA E-DDMs. The DS4700 Express
supports configurations of FC or Serial Advanced Technology Attachment (SATA)
disks, or a mix of both types of disk drives by use of the optional DS4700 Express
Fibre Channel/SATA Enclosure Intermix feature. Advanced DS4000 storage
management, copy service options, and optional advanced disaster recovery
functions are available for the DS4700 Express, including FlashCopy®, VolumeCopy,
and Enhanced Remote Mirroring.
The DS4700 Express supports up to four hosts in a redundant direct-attached fibre
channel configuration. When using fibre channel switches, you can redundantly
connect up to 512 hosts to the DS4700 Express.
Depending on the model, the DS4700 Express Storage Subsystems are shipped
with either ac or dc (-48V dc) power supply and fan unit CRUs. In addition, an
DS4700 Express Telco bezel assembly with an integrated air filter can also be
purchased for the operating environments that require it.
The DS4700 Express Storage Subsystem with dc power supply and fan units
(1814-70/2S&T) supports both NEBS level 3/Telco operating environments and
standard Information Technology (IT) and office environments. However, not all
DS4700 Express models with ac power supplies (1814-70/2A&H) support both
NEBS level 3/Telco operating environments and standard IT and office
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environments. DS4700 Express Storage Subsystems that shipped before the
introduction of the DS4700 Express models with dc power supply and fan units
support standard IT and office operating environments only. You can identify
whether a DS4700 Express Storage Subsystem is NEBS/Telco compliant by
checking the serial number. Any DS4700 Express Storage Subsystem with serial
numbers starting at 138500A and higher are NEBS level 3/Telco compliant.
The DS4000 Storage Manager client is also available for the DS4700 Express. This
storage management software is designed to help centralize storage management,
help simplify partitioning of the DS4000 storage subsystem, and strategically
allocate storage capacity to maximize storage space.
Models
The following DS4700 Express RAID controller cache size, partitions, and other
features vary depending the DS4700 Express model:
v Model 70H comes with 1 GB cache per controller, two host ports per controller,
and two storage partitions premium feature, which you can upgrade. Model 70H
can also be upgraded to support Copy Services premium features such as
FlashCopy, VolumeCopy and Enhanced Remote Mirroring when you purchase
those additional Copy Services premium feature options. Model 70H also
includes the Windows Host kit as standard. Model 70H does not come with
DS4000 drive expansion enclosure attachment entitlements. You can purchase 1
to 3 drive expansion and 4 to 6 drive expansion enclosures attachment
entitlements to connect up to six enclosures. Model 70H comes with ac power
supply and fan units.
v Model 70A is the same as Model 70H except that you can select to upgrade
partitions when placing the order. You can also select a supported host kit.
v Model 70S is the same as Model 70A except that it has dc power supply and fan
units instead of ac power supply and fan units.
v Model 70T is the same as Model 70H except that it has dc power supply and fan
units instead of ac power supply and fan units.
v Model 72H comes with 2 GB cache per controller, four host ports per controller,
and eight storage partitions premium feature, which you can upgrade when you
purchase storage partitioning upgrades. Model 72H can also be upgraded to
support Copy Services premium features such as FlashCopy, VolumeCopy and
Enhanced Remote Mirroring when you purchase those additional Copy Services
premium feature options. Model 72H also includes the Windows Host kit as
standard. Model 72H comes with 1 to 3 DS4000 drive expansion enclosure
attachment entitlements. You can upgrade to 4 to 6 drive expansion enclosures
attachment entitlements.
v Model 72A is the same as Model 72H except that you can select to upgrade
partitions when placing the order. You can also select a supported host kit. Model
72A comes with ac power supply and fan units.
v Model 72S is the same as Model 72A except that it comes with dc power supply
and fan units instead of ac power supply and fan units.
v Model 72T is the same as Model 72H except that it comes with dc power supply
and fan units instead of ac power supply and fan units.
Contact your IBM sales representatives or reseller for more information on the
various DS4700 Express models and options.
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Operating system support
For supported operating systems, see the latest DS4000 Storage Manager host
software readme file and the IBM DS4000 series products interoperability matrix at
the following Web site for additional host operating system support:
DS4000 readme files on the Web.
Fibre channel defined
Fibre channel technology is outlined in the SCSI-3 Fibre Channel Protocol
(SCSI-FCP) standard. Fibre channel is a high-speed data transport technology that
is used for mass storage and networking.
Using a fibre channel arbitrated loop (FC-AL), more than 100 fibre-channel devices
can be supported, compared to 15 small computer system interface (SCSI) devices.
The fibre channel connection speed from the storage subsystem to storage
expansion enclosures is either 2 Gbps or 4 Gbps depending on the type of
enclosures to which the storage subsystem is connected, allowing data transfer
rates up to 400 MBps half-duplex and 800 MBps full-duplex on optical interfaces.
SATA defined
The Serial Advanced Technology Attachment (SATA) interface offers increased data
rate performance over Parallel Advanced Technology Attachment (ATA), while
maintaining the benefits of ATA. SATA is designed to overcome the performance
barriers that have been forecasted for current parallel technologies while
maintaining the cost-efficiency of Parallel ATA. SATA specifications allow for thinner,
more flexible cables, and lower pin counts. It also enables easier, more flexible
cable routing management and the use of smaller connectors than is possible with
the existing Parallel ATA technology.
The Serial ATA Working Group introduced the first SATA specification, Serial ATA
1.0, in 2001 (http://www.serialata.org).
Inventory checklist
After you unpack the DS4700 Express, verify that you have the following items.
Note: Depending on your DS4700 Express order, your shipping box might contain
additional materials not listed in the following checklist. Review the inventory
checklist included in the DS4700 Express shipping box for any additional
parts, and use that checklist in combination with the following information.
v Hardware
– Blank trays (16) (Your storage subsystem might come with up to 16 E-DDMs.)
– RAID controllers (2)
– AC power supply and fan units (2) (Models 70A, 70H, 72A, and 72H only)
– DC power supply and fan units (2) (Models 70S, 70T, 72S, and 72T only)
– Battery units (2)
– Power cables (2 rack jumper line cords) (Models 70A, 70H, 72A, and 72H
only)
– DC power jumper cables (2) (Models 70S, 70T, 72S, and 72T only)
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– Diagnostic wrap plug/coupler (1)
– Serial cable adapter (1)
– Rack-mounting hardware kit (1), including:
- Rails (2) (right and left assembly)
- M5 black hex-head slotted screws (12)
- Washers (8)
– 4 Gbps SFPs (6) (Model 72A, 72H, 72S, and 72T only. The SFPs are installed
in the DS4700 Express SFP ports.)
– 4 Gbps SFPs (4) (Model 70A, 70H, 70S, and 70T only. These SFPs are
installed in the DS4700 Express SFP ports.)
– (Optional) DS4700 Express Telco bezel (1)
Attention: The DS4700 Express does not ship with region-specific ac power
cords. You must obtain the IBM-approved power cords for your region. See
Appendix C, “Power cords,” on page 199 for the IBM-approved power cords for
your region.
v Software and documentation
– Host software attachment kit
Depending on the DS4700 Express model that you order, your DS4700
Express will ship with either the Microsoft Windows host software attachment
kit or with your choice of host software kits (Windows, AIX, Linux, Netware,
SUN Solaris, HP-UX, Linux on POWER, or VMware). The host software kit
grants you permission to attach host servers using the appropriate operating
system to the DS4700 Express. The kit includes a DS4000 Storage Manager
Support CD that has the appropriate IBM DS4000 Storage Manager host
software. The CD also includes firmware, online help, and publications in
Adobe Acrobat Portable Document Format (PDF). (For a list of available IBM
DS4000 publications, see Appendix D, “Additional DS4000 documentation,” on
If you order more than one host software kit, the additional kits may also be
shipped in the DS4700 Express shipping box.
Note: Depending on your DS4700 Express model, you may need to purchase
the appropriate host software kit for your host server operating system.
Contact your IBM representative or reseller for more information.
– Activation kit:
- Two storage partitions activation kit (Model 70H and 70T)
- Eight storage partitions activation kit (Model 72H and 72T)
- Storage partition kit with the number of partitions you ordered (Models 70A,
70S, 72A, and 72S)
– IBM System Storage DS4700 Express Storage Subsystem Installation, User's,
and Maintenance Guide
– IBM System Storage Quick Start Guide for the DS4700 Express and DS4200
Express
– IBM Safety Information
– IBM License Agreement
– Statement of Limited Warranty
– Box ID labels (used to label the enclosure IDs on the front of the DS4700
Express)
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Note: If you ordered additional premium features or entitlements, the premium
features activation or entitlement kits may also be shipped inside the box.
If an item is missing or damaged, contact your IBM reseller or your IBM marketing
representative.
A rack mounting template and instructions for installing the support rails and the
storage subsystem are provided in “Installing the support rails” on page 36.
To connect your DS4700 Express to other devices, use the following options:
v IBM SFP module
v IBM LC-LC fibre-channel cable
v IBM LC-SC fibre-channel cable (for host-side connections only)
Note: You must order these options separately.
Product updates and support notifications
Be sure to download the latest versions of the DS4000 Storage Manager host
software, DS4000 storage subsystem controller firmware, DS4000 drive expansion
enclosure ESM firmware, and drive firmware at the time of the initial installation and
when product updates become available.
Important
Keep your system up to date with the latest firmware and other product
updates by subscribing to receive support notifications.
For more information about support notifications or the My Support feature,
including instructions on how to register, see the following IBM Support Web page:
You can also check the Stay Informed section of the IBM Disk Support Web site:
Best practices guidelines
To ensure optimal operation of your system, always follow these best practices
guidelines:
v Ensure that your system is in an optimal state before you shut it down. Never
turn the power off if any Needs Attention LED is lit; be sure to resolve any error
conditions before you shut down the system.
v Back up the data on your storage drives periodically.
v To maintain power redundancy, plug the DS4700 Express right and left power
supply and fan units into two independent external power circuits through ac
power distribution units inside a rack cabinet or directly into external receptacles.
Similarly, the right and left power supplies of the DS4000 storage expansion
enclosures attached to the DS4700 Express should be plugged into the same
two independent external power circuits as the DS4700 Express. This ensures
that the DS4700 Express and all its attached storage expansion enclosures will
have power in the event that only one power circuit is available. In addition,
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having all the right or all the left power cables plug into the same power circuit
enables the DS4000 devices in the configuration to power on simultaneously
during an unattended restoration of power.
Note: Do not overload the circuits that power your storage subsystem and
storage expansion enclosures. Use additional pairs of ac power
information on storage subsystem power requirements. Contact your IBM
service representative for additional information if needed.
v Before any planned system shutdown or after any system additions, removals, or
modifications (including firmware updates, logical drive creations, storage
partitioning definitions, hardware changes, and so on), complete the following
tasks:
1. Save the storage subsystem profile
2. Save the storage subsystem configuration
Make sure that you save the files in a location other than in the logical drives that
were created for the storage subsystem.
For more information on how to complete these tasks, check the DS4000
Storage Manager online help or the Storage Manager guide for your operating
system.
v During any maintenance or attended power-up procedure, carefully follow the
power-up sequence listed in “Powering on the storage subsystem” on page 119.
Check that each component of the subsystem is powered-on in the proper order
during this entire power-up procedure to ensure the controller will be able to
optimally access all of your storage subsystems.
v The storage subsystem supports simultaneous power-up to the system
components; however, you should always follow the power-up sequence listed in
“Powering on the storage subsystem” on page 119 during any attended power-up
procedure.
v A storage system in an optimal state should recover automatically from an
unexpected shutdown and unattended simultaneous restoration of power to
system components. After power is restored, call IBM support if any of the
following conditions occur:
– The storage subsystem logical drives and subsystems are not displayed in the
DS4000 Storage Manager graphical user interface (GUI).
– The storage subsystem logical drives and subsystems do not come online.
– The storage subsystem logical drives and subsystems seem to be degraded.
Storage subsystem components
The storage subsystem has the following removable components. These
components, called customer replaceable units (CRUs), are accessible from the
front or back of the storage subsystem.
v Up to sixteen 2 or 4 Gbps fibre channel or SATA Enhanced Disk Drive Modules
(E-DDMs)
v Two RAID controllers
v Two ac power supply and fan units (Models 70A, 70H, 72A, and 72H)
v Two dc power supply and fan units (Models 70S, 70T, 72S, and 72T)
v Two battery units
v SFP modules
v Bezel
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v Filter and filter retainer
The hot-swap features enable you to remove and replace 2 or 4 Gbps fibre channel
or SATA hard E-DDMs, power supply and fan units, and controllers without turning
off the storage subsystem. You can maintain the availability of your system while a
hot-swap device is removed, installed, or replaced.
Enhanced Disk Drive Modules (E-DDMs)
The hot-swap drive bays that are accessible from the front of your storage
subsystem are shown in Figure 1.
Figure 1. DS4700 Express hot-swap drive bays
The DS4700 Express supports both fibre channel (FC) and SATA E-DDMs
intermixed in the storage subsystem drive chassis. The DS4700 Express supports
up to sixteen 2 or 4 Gbps fibre channel (FC) or SATA E-DDMs.
SATA E-DDMs have an ATA translator card that converts the fibre channel protocol
interface of the DS4700 Express drive channel/loop into the hard drive SATA
protocol interface. It also provides dual paths to the SATA drive for drive CRU path
redundancy. Each drive, ATA translator card (also referred to as interposer card),
and carrier assembly are called SATA E-DDM CRUs. The fibre channel E-DDMs
consisted of the fibre channel and the carrier assembly (drive tray).
Install E-DDM CRUs in the 16 drive bays on the front of the storage subsystem
from the leftmost slot (slot 1) to the rightmost slot (slot 16). When a E-DDM is
installed, the drive and tray slot designation is set automatically. The hardware
addresses are based on the enclosure ID, which is set by the controller software,
and on the E-DDM's physical location in the storage subsystem.
The DS4700 Express Storage Subsystem drive channel operates at either 2 or 4
Gbps fibre channel interface speed. Ensure that the DS4700 Express enclosure
speed switch is set correctly for the 2 Gbps or 4 Gbps fibre channel E-DDM CRUs.
The DS4700 Express Storage Subsystem SATA E-DDM CRUs have an ATA
translator card that converts E-DDM 3 Gbps SATA drive interface protocol to either
2 Gbps or 4 Gbps fibre channel interface protocol. It is recommended to operate
these SATA E-DDMs at 4 Gbps fibre channel operating speed whenever the
configuration allows, for example, when no 2 Gbps fibre channel devices are in the
configuration. The Link Rate setting speed must be set accordingly. See “Verifying
the Link Rate setting ” on page 161 for more information. The enclosure speed of
the DS4000 Storage Subsystem must be the same as that of the storage expansion
enclosures connected to it.
There are no serviceable parts in an E-DDM CRU. If it fails, it must be replaced in
its entirety (E-DDM, ATA translator card, bezel, and tray). The DS4700 Express
drive tray is not interchangeable with the drive tray of other DS4000 storage
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subsystems such as DS4100 or DS4300 storage subsystems. The DS4700 Express
E-DDM option CRUs are not interchangeable with those of the DS4200 Express
and EXP420. When replacing an E-DDM CRU, be sure to order and install the
correct E-DDM CRU. Using non-supported E-DDM options or FRUs will result in the
E-DDM being locked out by the DS4700 Express controller firmware and might also
damage the drive connector in the enclosure midplane.
Attention:
1. After you remove a E-DDM CRU, wait 70 seconds before replacing or reseating
the E-DDM CRU to allow it to properly spin down. Failure to do so may cause
undesired events.
2. Never hot-swap a E-DDM CRU when its associated green Activity LED is
flashing. Hot-swap a E-DDM CRU only when its associated amber Fault LED
lights is not flashing or when the E-DDM is inactive and its associated green
Activity LED lights is not flashing.
Note: If the E-DDM you want to remove is not in a failed or bypass state, always
use the Storage Manager client program either to place it in a failed state or
to place the array that is associated with the E-DDM (or E-DDMs) in an
offline state before you remove it from the enclosure.
Controllers
The DS4700 Express has two hot-swappable and redundant RAID controllers. The
controllers are located at the back of the storage subsystem. The left controller is
labeled controller A, and the right controller is labeled controller B. One controller
will continue to operate if the other controller fails.
The controllers contain the storage subsystem control logic, interface ports, and
LEDs. The controller on model 70 has two fibre channel host ports and the
controller on model 72 has four fibre channel host ports that you could use to
connect the storage subsystem to the host server. In addition, each controller for
both DS4700 Express subsystem models 70 and 72 has two fibre channel drive
ports for connecting to the DS4000 storage expansion enclosures and two Ethernet
ports for DS4700 Express subsystem management purposes. See Figure 2 on page
Although both controllers (A and B) are identical, they are seated in the DS4700
cannot fully be inserted in the controller bay, flip it 180 degrees and reinsert it. Do
not force fit because it may cause damage to the controller unit.
Connectors, switch, and enclosure ID
The controllers support fiber optic interfaces for both the host channel and drive
channel ports. The controllers also contain two Ethernet ports for storage
subsystem management purposes and a serial port that IBM Support uses to
perform problem recovery and troubleshooting procedures.
The default IP addresses for the Ethernet ports on controller A are 192.168.128.101
and 192.168.129.101. The default IP addresses for the Ethernet ports on controller
B are 192.168.128.102 and 192.168.129.102. The subnet mask for all cases are
255.255.255.0. See “Setting up IP addresses for DS4000 storage controllers” on
page 11 for more information.
The enclosure ID, comprised of two seven-segment numbers, is located on the
back of each controller next to the controller indicator lights. The two digits that
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comprise the enclosure ID are referred to as x10 and x1 digits. The enclosure ID
provides a unique identifier for each enclosure in the storage subsystem. The
storage management software automatically sets the enclosure ID number. You can
only change the enclosure ID setting through the DS4000 storage management
software. There are no switches on the DS4700 Express chassis to manually set
the enclosure ID. Both controller enclosure ID numbers will be identical under
normal operating conditions. The enclosure ID is set to a value of 85 from the
factory.
Storage expansion enclosures in a DS4000 storage subsystem must also have
unique enclosure IDs. In addition to having unique enclosure IDs for each storage
expansion enclosure (including the DS4000 storage subsystems with drives
installed) in the DS4000 storage subsystem configuration, ensure that the single
digit (x1) of the enclosure ID for every storage expansion enclosure in a redundant
drive channel/loop pair is unique.
If you do not set the single digit value of the enclosure IDs to be unique among
storage expansion enclosures (including the DS4000 storage subsystem with drives
installed) in a redundant drive channel/loop pair, then drive loop errors might be
randomly posted in the DS4000 subsystem Major Event Log (MEL) when you
intermix different types of storage expansion enclosures in a redundant drive loop
pair (such as an EXP100 with an EXP810). For example, with four enclosures
attached to a DS4500 in a redundant drive loop pair, the correct enclosure ID
settings should be x1, x2, x3, and x4 (where x can be any digits that can be set).
Examples of incorrect settings would be 11, 21, 31, 41; or 12, 22, 32 62. These
examples are incorrect because the x1 digits are the same in all enclosure IDs
(either 1 or 2).
If the enclosure IDs in your DS4000 subsystem configuration are not currently set to
have unique single digit (x1) values for the enclosures in the same redundant drive
channel/loop pair, make the changes to the enclosure IDs in the next maintenance
schedule if you have storage expansion enclosures with mechanical switches such
as EXP710s in the DS4000 configuration. This will prevent unnecessary downtime
when you add enclosures of different types (especially EXP810s) to the existing
enclosures in the redundant drive channel/loop pair. Storage expansion enclosures
and DS4000 storage subsystems with mechanical enclosure ID switches require
that you power cycle the configurations to activate the new enclosure ID settings.
The EXP810 storage expansion enclosures do not required you to power cycle the
DS4000 configuration to activate new enclosure ID settings.
on page 10 shows the controllers for DS4700 Express model 72.
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6
5
4
3
1
2
3
4
5
6
7
Figure 2. Back view; connectors, switch, ports, enclosure ID on model 70
Number
Description
1
2
3
4
5
6
7
Controller A
Controller B
Host channels
Ethernet ports
Serial port
Dual-ported drive channel
Enclosure ID
7
6
5
4
3
1
2
3
4
5
6
7
Figure 3. Back view; connectors, switch, ports, enclosure ID on model 72
Number
Description
1
2
3
4
5
6
7
Controller A
Controller B
Host channels
Ethernet ports
Serial port
Dual-ported drive channel
Enclosure ID
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Setting up IP addresses for DS4000 storage controllers
After you install DS4000 Storage Manager (as described in the DS4000 Storage
Manager Installation and Support Guide for your host operating system), complete
one of the following procedures to set up IP addresses:
Steps for setting up the DHCP/BOOTP server and network: To complete this
procedure, you must have the following components:
v A DHCP or BOOTP server
v A network management station (NMS) for Simple Network Management Protocol
(SNMP) traps
v A host that is connected to a storage subsystem through a fibre-channel I/O path
v A management station that is connected by an Ethernet cable to the storage
subsystem controllers
Note: You can avoid DHCP/BOOTP server and network tasks either by using the
default controller IP addresses, or by assigning static IP addresses to the
controller, as described in the next section.
Complete the following steps to set up the DHCP/BOOTP server and network:
1. Get the MAC address from each controller blade.
2. Complete whichever of the following steps is appropriate for your server:
v On a DHCP server, create a DHCP record for each of the MAC addresses.
Set the lease duration to the longest time possible.
v On a BOOTP server, edit the bootptab file to add in the entries that associate
the MAC address tab with the TCP/IP address.
3. Connect the DS4000 storage subsystem Ethernet ports to the network.
4. Boot the DS4000 storage subsystem.
The DHCP server automatically assigns new IP addresses to the controller Ethernet
port.
Steps for assigning static TCP/IP addresses to the DS4000 controllers: To
complete this procedure, you must have the following components:
v A host that is connected to a storage subsystem through a fibre-channel I/O path
v A management station that is connected by an Ethernet cable to the storage
subsystem controllers
Complete the following steps to assign static TCP/IP addresses to the DS4000
storage subsystem controllers, using default TCP/IP addresses that are assigned to
the DS4000 storage subsystem controllers during manufacturing:
1. Make a direct management connection to the DS4000 storage subsystem, using
the default TCP/IP addresses:
v Controller A: 192.168.128.101
v Controller B: 192.168.128.102
v Subnet Mask: 255.255.255.0
Note: For a DS4000 subsystem that has two Ethernet ports per controller, such
as the DS4200, DS4700 and DS4800, use the Ethernet port that is
labeled #1.
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2. Start the DS4000 Storage Manager client software. The Enterprise Management
window opens.
3. Add the DS4000 subsystem to the DS4000 Enterprise Management domain
using the default IP addresses.
4. In the Enterprise Management window, click on the name of the default storage
subsystem. The Subsystem Management window opens.
5. In the Subsystem Management window, right-click the controller icon and select
Change —> Network Configuration in the pull-down menu. The Change
Network Configuration window opens.
6. In the Change Network Configuration window, click on the Controller A and
Controller B tabs and type the new TCP/IP addresses in their appropriate fields.
Click OK.
7. Close the Subsystem Management window, wait at least five minutes, then
delete the default DS4000 storage subsystem entry in the Enterprise
Management window. The default DS4000 storage subsystem entry still
displays, but shows an “unresponsive” icon.
8. If applicable, change the IP address of the Ethernet port in the management
station to a value that is on the same TCP/IP subnet as the controller Ethernet
port IP addresses that you just assigned. Exit DS4000 Storage Manager, then
restart.
9. Add a new storage subsystem entry in the Enterprise Management window,
using the new assigned IP addresses.
Note: To manage storage subsystems through a firewall, configure the firewall to
open port 2463 to TCP data.
AC power supply and fan units
The DS4700 Express Storage Subsystem (models 70A, 70H, 72A, and 72H) has
two removable ac power supply and fan units. Each power supply and fan unit
contains one power supply and two fans. The four fans pull air through the drive
from front to back across the drives.
The fans provide redundant cooling, which means that if one of the fans in either
fan housing fails, the remaining fans continue to provide sufficient cooling to
operate the storage subsystem. The power supplies provide power to the internal
components by converting incoming ac voltage to dc voltage. If one power supply is
turned off or malfunctions, the other power supply maintains electrical power to the
storage subsystem. To preserve the optimal airflow, do not remove a failed power
supply and fan unit CRU from the DS4700 Express chassis until you are ready to
replace it with a new CRU.
Figure 4 on page 13 shows power supply and fan unit components for the DS4700
components for DS4700 Express model 72.
Note: Although both power supply and fan units (left and right) are identical, they
are seated in the DS4700 Express chassis in opposite orientations. If the
power supply and fan unit cannot fully be inserted in the power supply and
fan unit bay, flip it 180 degree and reinsert it.
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4
3
2
1
3
4
Figure 4. Power supply and fan unit components for DS4700 Express model 70
Number
Description
1
2
3
4
Power supply and fan unit A
Power supply and fan unit B
Power connector
Power switch
4
3
2
1
3
4
Figure 5. Power supply and fan unit components for DS4700 Express model 72
Number
Description
1
2
3
4
Power supply and fan unit A
Power supply and fan unit B
Power connector
Power switch
Figure 6 on page 14 shows a power supply and fan unit and the airflow through the
storage subsystem.
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Latch
Lever
Figure 6. Power supply and fan unit and airflow
DC power supply and fan units
The DS4700 Express Storage Subsystem (models 70S, 70T, 72S, and 72T) has
two removable dc power supply and fan units. Each dc power supply and fan unit
contains one dc power supply and two fans. The four fans pull air through the drive
from front to back across the drives.
The fans provide redundant cooling, which means that if one of the fans in either
fan housing fails, the remaining fans continue to provide sufficient cooling to
operate the storage subsystem. The power supplies provide power to the internal
components. If one power supply is turned off or malfunctions, the other power
supply maintains power to the storage subsystem. To preserve the optimal airflow,
do not remove a failed dc power supply and fan unit CRU from the DS4700
Express chassis until you are ready to replace it with a new CRU.
Figure 6 shows a power supply and fan unit and the airflow through the storage
subsystem.
Note: Although both dc power supply and fan units (left and right) are identical,
they are seated in the DS4700 Express chassis in opposite orientations. If
the dc power supply and fan unit cannot fully be inserted in the dc power
supply and fan unit bay, flip it 180 degree and reinsert it.
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1
1
Figure 7. DC power supply and fan unit
Figure 8 shows the dc power supply and fan unit components for the DS4700
components for the DS4700 Express model 72.
4
7
6
5
1
2
4
3
10
9
8
9
10
8
Figure 8. DC power supply and fan unit for DS4700 Express model 70
Table 6. DC power supply and fan unit description for DS4700 Express model 70
Number
Description
1
2
DC power supply and fan unit A
DC power connector A11
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Table 6. DC power supply and fan unit description for DS4700 Express model 70 (continued)
Number
Description
3
DC power connector A21
4
DC power switch
5
DC power supply and fan unit B
DC power connector B12
DC power connector B22
Pin 1: -48 V dc
6
7
8
9
Pin 2: POS RTN
10
Pin 3: GND
Notes:
1. The A1 and A2 dc connectors are keyed so that the dc cables are connected to the A1
and A2 connectors in only one way and in opposite orientation from each other. If the dc
cable does not fit the dc connector, flip it 180 degrees and try again. Do not force fit
because you might damage the connectors and short out the power supply.
2. The B1 and B2 dc connectors are keyed so that the dc cables are connected to the B1
and B2 connectors in only one way and in opposite orientation from each other. If the dc
cable does not fit the dc connector, flip it 180 degrees and try again. Do not force fit
because you might damage the connectors and short out the power supply.
4
7
6
5
1
2
4
3
10
9
8
9
10
8
Figure 9. DC power supply and fan unit for DS4700 Express model 72
Table 7. DC power supply and fan unit description for DS4700 Express model 72
Number
Description
1
2
DC power supply and fan unit A
DC power connector A11
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Table 7. DC power supply and fan unit description for DS4700 Express model 72 (continued)
Number
Description
3
DC power connector A21
4
DC power switch
5
DC power supply and fan unit B
DC power connector B12
DC power connector B22
Pin 1: -48 V dc
6
7
8
9
Pin 2: POS RTN
10
Pin 3: GND
Notes:
1. The A1 and A2 dc connectors are keyed so that the dc cables are connected to the A1
and A2 connectors in only one way and in opposite orientation from each other. If the dc
cable does not fit the dc connector, flip it 180 degrees and try again. Do not force fit
because you might damage the connectors and short out the power supply.
2. The B1 and B2 dc connectors are keyed so that the dc cables are connected to the B1
and B2 connectors in only one way and in opposite orientation from each other. If the dc
cable does not fit the dc connector, flip it 180 degrees and try again. Do not force fit
because you might damage the connectors and short out the power supply.
Battery units
Each controller also contains a rechargeable battery unit that maintains data in the
cache in the event of a power failure.
Figure 10 on page 18 shows how the battery unit slides into the battery backup slot
in controller A CRU.
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3
4
1
2
Figure 10. Battery unit
Number
Description
1
2
3
4
Controller A cache backup battery unit
Controller B cache backup battery unit
Latch
Pull handle
The battery unit provides backup power to each controller's cache memory. Each
battery unit contains a sealed, rechargeable lithium ion battery. The battery unit can
maintain data in the cache for three days.
The battery chargers in the power supply and fan units perform a battery test when
the storage subsystem is started and on a regularly scheduled interval thereafter.
Data caching starts after the battery completes its battery tests.
The battery unit is hot-swappable. You can remove the battery unit for servicing and
then reinsert it while the DS4700 Express continues to perform I/O operations.
However, write I/O caching is disabled when the battery is in a failed state. Replace
the failed battery as soon as possible to minimize the time that the write IO caching
is disabled.
Information about the condition of the battery unit is conveyed by indicator LEDs on
LEDs on the battery unit and explains the conditions that each LED indicates.)
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SFP modules
The storage subsystem supports a fiber optic interface for host and storage
expansion enclosure connections. You must install a Small Form-factor Pluggable
(SFP) module in each interface connector on the controller where a fibre optic cable
is to be installed. Do not install an SFP in any port that will not have a fibre optic
cable attached. Additionally, it is recommended that you remove any SFP from any
port that does not have fibre optic cables attached.
The DS4700 Express Storage Subsystem host ports support 1, 2 and 4 Gbps fibre
channel speeds. The DS4700 Express Storage Subsystem drive ports support only
2 and 4 Gbps fibre channel speeds.
Attention: The maximum operating speed of the fibre channel port is determined
by two factors: the speed of the SFP module that is installed and the speed of the
fibre channel connection. For example, a 2-Gbps SFP that is plugged into a
4-Gbps-capable port will limit the speed of that port to a maximum of 2 Gbps.
Conversely, a 4-Gbps SFP that is plugged into a 2-Gbps-capable port will limit the
speed of the port to a maximum of 2 Gbps. Carefully check the SFP's IBM part
number, option number, and FRU part number to identify its speed. There are no
physical features that distinguish a 4 Gbps from a 2 Gbps SFP.
Figure 11 shows an example of SFP module with fiber optic cable.
Note: The SFP module and the fibre optic cable shown are for illustrative purposes
only. The actual SFP module and the fibre optic cable shape may look
different from the figure shown.
SFP
Module
Fiber-optic
cable
Figure 11. SFP module and fiber optic cable
Telco bezel
The DS4700 Express Storage Subsystem can be ordered with a Telco bezel. The
Telco bezel also contains a filter and filter retainer. The replaceable filter is fitted
inside the Telco bezel and limits impurities, dust, air particles and other external
contaminants from adversely impacting the chassis, electronic CRUs, and hard
drive operational effectiveness. IBM recommends that you replace the filter every
three months or sooner, depending on your environment. Inspect the filter
periodically and replace it as required.
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bezel, filter, and filter retainer.
ds470065
Figure 12. Bezel
1
2
3
Figure 13. Filter and filter retainer
Table 9. Filter and filter retainer description
Number
Description
Bezel
1
2
3
Filter
Filter retainer
Software and hardware compatibility and upgrades
The latest DS4000 controller firmware and NVSRAM, the storage expansion
enclosure drive enclosure ESM firmware, and fibre channel and SATA drive CRUs
firmware must be installed to ensure optimal functionality, manageability, and
reliability.
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Unless stated otherwise, you can find the latest DS4000 publications, firmware, and
host software at the IBM DS4000 System Storage Support Web site:
Software and firmware support code upgrades
To enable support for the DS4700 Express, you must ensure that your system's
software and firmware are the correct versions. To find the latest DS4000 Storage
Manager software, storage subsystem controller firmware, ESM, and NVSRAM
firmware, check the firmware readme files. See “Finding DS4000 readme files” on
page xxvii to learn how to access the readme files on the Web.
See the IBM System Storage DS4000 Storage Manager Installation and Host
Support Guide for your operating system for instructions that describe how to install
the DS4000 controller firmware and Storage Manager host software.
Note: For the latest information about supported servers and operating systems,
refer to the interoperability matrix at this Web site:
Determining firmware levels
There are two different methods to determine the DS4000 storage subsystem and
firmware versions. Each method uses the DS4000 Storage Manager client that
manages the DS4000 storage subsystem.
Method One:
Go to the Subsystem Management window and select View → Storage Subsystem
Profile. When the Storage Subsystem Profile window opens, select the All tab and
scroll through the Profile For Storage Subsystem list to locate the following
information.
Note: The Profile For Storage Subsystem list contains all the profile information for
the entire subsystem. Therefore, it may be necessary to scroll through a
large amount of information to locate the firmware version numbers.
DS4000 Storage Server
v NVSRAM version
v Appware version
v Bootware version
Drives
v Firmware version
v ATA translator card firmware version (SATA E-DDMs only)
Note: The ATA translator card firmware and drive firmware are typically
packaged together as a single drive firmware upgrade file.
ESM
v
ESM card firmware version
Method Two:
Complete the appropriate procedure to obtain the specified firmware version.
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To obtain the controller firmware version:
Right-click the Controller icon in the Physical View pane of the Subsystem
Management window and select Properties. The Controller Enclosure
properties window opens and displays the properties for that controller.
You must perform this step for each individual controller.
To obtain the drive firmware (and ATA translator card firmware) version:
Right-click the Drive icon in the Physical View pane of the Subsystem
Management window and select Properties. The Drive Properties window
opens and displays the properties for that drive.
You must perform this step for each individual drive.
To obtain the ESM and drive enclosure component firmware versions:
1. In the Physical View pane of the Subsystem Management window, click
the Drive Enclosure Component icon, which is the icon furthest to the
right. The Drive Enclosure Component Information window opens.
2. Click the ESM icon in the left pane. The ESM information displays in the
right pane of the Drive Enclosure Component Information window.
3. Locate the firmware version of each ESM in the drive enclosure.
Specifications
This section provides site specifications for the DS4700 Express Storage
Subsystem. Before installing, you must either verify that your planned installation
site meets these requirements, or prepare the site so that it does meet these
requirements. Preparations might involve meeting area requirements, environmental
requirements, and electrical requirements for DS4700 Express Storage Subsystem
installation, service, and operation.
Area requirements
The floor space at the installation site must provide enough strength to support the
weight of the storage subsystem and associated equipment; sufficient space to
install, operate, and service the storage subsystem; and sufficient ventilation to
provide a free flow of air to the unit.
Dimensions
Figure 14 on page 23 shows the dimensions of the DS4700 Express, which
conforms to the 19-inch rack standard.
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44.70 cm (17.60 in.)
12.95 cm (5.1 in.)
57.15 cm (22.5 in.)
48.26 cm (19.00 in.)
Figure 14. DS4700 Express dimensions
Weight
The total weight of the storage subsystem depends on the number of components
Table 10. DS4700 Express weights
Weight
1
Unit
Maximum
Empty 2
Shipping
DS4700 Express
40 kg (88 lb)
16.4 kg (36.1 lb)
52.2 kg (115.0 lb)
1
Chassis with all CRUs and 16 drives.
2
Chassis without CRUs and drives but with front cage frame and midplane.
Table 11. DS4700 Express component weights
Unit
Weight
Drive
0.75 kg (1.65 lb)
3.60 kg (7.95 lb)
2.8 kg (6.1 lb)
Power supply and fan unit
Controller (including cache battery backup
unit)
Battery unit
0.9 kg (2 lb)
Shipping dimensions
the pallet.
Table 12. DS4700 Express shipping carton dimensions
Height
Width
Depth
45.7 cm (18.0 in.)
62.6 cm (24.5 in.)
80.7 cm (31.75 in.)
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Environmental requirements and specifications
This section describes the environmental requirements and specifications for the
DS4700 Express Storage Subsystem, including temperature and humidity, altitude,
airflow and heat dissipation, shock and vibration requirements, and acoustic noise
levels.
Temperature and humidity
and humidity ranges for the storage subsystem in typical Information Technology
storage subsystem in a Telco/NEBS-3 compliant environment.
Note: Substantial deviations from the suggested operating range, in either
direction, if sustained for extended periods of time, will expose the unit to
greater risk of failure from external causes.
Important: The recommended operating environment air temperature is 22° C (72°
F) or lower.
Table 13. Temperature and humidity requirements for storage subsystem when in storage or
in transit
Condition
Parameter
Requirement
Temperature
Storage range
-10° - 65° C (14° - 149° F)
15° C (27° F) per hour
Maximum rate of change
Transit range
-40° C to 65° C (-40° F to
149° F)
Maximum rate of change
Storage range
20° C (36° F) per hour
8% to 90%
Relative humidity (no
condensation)
Transit range
5% to 95%
Maximum dew point
Maximum gradient
26° C (79° F)
10% per hour
Table 14. Temperature and humidity requirements for storage subsystem in a typical
Information Technology (IT) or office environment
Condition
Parameter
Requirement
Temperature
Operating range
Maximum rate of change
Operating range
10° - 35° C (50° - 95° F)
10° C (18° F) per hour
8% to 80%
Relative humidity (no
condensation)
Table 15. Temperature and humidity requirements for storage subsystem in a Telco/NEBS-3
compliant environment
Condition
Parameter
Requirement
Temperature1
Operating range
Short-term2
5° - 40° C (41° - 104° F)
-5° - 50° C (23° - 122° F)
30° C (54° F) per hour
Maximum rate of change
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Table 15. Temperature and humidity requirements for storage subsystem in a Telco/NEBS-3
compliant environment (continued)
Condition
Parameter
Requirement
Relative humidity1 (no
condensation)
Operating range
Short-term2
5% to 85%
5% to 90% (not to exceed
0.024 kg water/kg of dry air)
Notes:
1. In a Telco/NEBS-3 compliant environment, conditions are measured at a location 1.5 m
(59 in.) above the floor and 400 mm (15.8 in.) in front of the equipment.
2. Short-term refers to a period of not more than 96 consecutive hours and a total of not
more than 15 days in one year. (This refers to a total of 360 hours in any given year, but
no more than 15 occurrences during that one-year period.)
Altitude
DS4700 Express.
Table 16. DS4700 Express altitude ranges
Environment
Altitude
Operating
30.5 m (100 ft.) below sea level to 3000 m
(9842 ft.) above sea level
Storage
Transit
30.5 m (100 ft.) below sea level to 3000 m
(9842 ft.) above sea level
30.5 m (100 ft.) below sea level to 12,000 m
(40,000 ft.) above sea level
Airflow and heat dissipation
Figure 15 shows the intended airflow for the DS4700 Express. Allow at least 30
inches in front of the storage subsystem and at least 24 inches behind the storage
subsystem for service clearance, proper ventilation, and heat dissipation.
Figure 15. DS4700 Express airflow
assume the power supplies have a 73 percent efficiency and a power factor of 0.99.
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These tabulated power and heat dissipation values are typical for the storage
subsystem. Maximum configuration units are typically operated at higher data rates,
have larger random access memory (RAM) capacities, or have different host
interface boards.
Table 17. DS4700 Express power and heat dissipation
Parameter
KVA
Watts (ac)
Btu per hour
DS4700 Express
0.454
443
1516
Shock and vibration requirements
Operational shock and operational vibration requirements are shown in this section.
Operational Shock: The DS4700 Express will be able to withstand the following
shock. Subjecting the equipment to a single shock pulse with the following
characteristics will simulate this level of shock:
v Velocity change = 20 inches per second
v Wave form = Triangular, 10g @3.75 ms
Operational Vibration (Random): While in its normal operating position, the
DS4700 Express will continue operating when subjected to a random vibration test
density for 30 minutes in each of the three axes.
Table 18. Random vibration power spectral density
Hz
g2/Hz
5
17
45
2.2x10-5
48
2.2x10-5
62
2.2x10-5
65
2.2x10-5
150
2.2x10-5
200
2.2x10-5
500
2.2x10-5
2.0x10-7-7 2.2x10-5
Acoustic noise
Table 19. DS4700 Express sound levels
Measurement
Level
Sound power (normal operation)
Sound pressure (normal operation)
6.8 bels
68 dBA
These levels are measured in controlled acoustical environments according to ISO
7779 and are reported in accordance with ISO 9296. The declared sound power
levels indicate an upper limit, below which a large portion of machines operate.
Sound pressure levels in your location might exceed the average 1-meter values
stated because of room reflections and other nearby noise.
Electrical requirements
This section provides information regarding site power and wiring, storage
subsystem ac power requirements, dc power requirements and power cord routing
instructions.
Consider the following information when preparing the installation site:
v Protective ground – Site wiring must include a protective ground connection to
the ac power source.
Note: Protective ground is also known as safety ground or chassis ground.
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v Circuit overloading – Power circuits and associated circuit breakers must provide
sufficient power and overload protection. To prevent possible damage to the unit,
isolate its power source from large switching loads (such as air conditioning
motors, elevator motors, and factory loads).
v Power failures – If a total power failure occurs, the unit automatically performs a
power-up recovery sequence without operator intervention after power is
restored.
Table 20. DS4700 Express ac power requirements
Low Range
90 to 136 VAC
50 to 60 Hz
3.86 Aa
High Range
198 to 264 VAC
50 to 60 Hz
2.05 Ab
Nominal Voltage
Frequency (Hertz)
Idle Current
Maximum Operating Current 4 A/4.54 Aa c
Maximum Surge Current
5.04 Aa
2.12 A/2.41 Ab c
2.67 Ab
a. Typical voltage: 115 V ac, 60 Hz, assumes 72% power-supply efficiency and 0.99 power
factor
b. Typical voltage: 230 V ac, 60 Hz, assumes 72% power-supply efficiency and 0.99 power
factor
c. The higher number in this range applies when all of the drives are placed in Selfseek
mode.
Table 21. DS4700 Express dc power requirements
Requirement
Operating Voltage
-42 V to -60 V
-48 V
Nominal Voltage
Idle Current
11.8 A
Maximum Operating Current
Maximum Surge Current
15.8 A
16 A
Power and site wiring requirements for models with ac power
supply and fan units
The storage subsystem uses wide-ranging redundant power supplies that
automatically accommodate voltages to the ac power source. The ac power
meet standard voltage requirements for both domestic (inside USA) and
international (outside USA) operation. They use standard industrial wiring with
line-to-neutral or line-to-line power connections.
The agency ratings for the DS4700 Express Storage Subsystem (ac models) are 6
amps at 100 VAC and 2.5 amps at 240 VAC. These are the overall maximum
operating currents for the DS4700 Express Storage Subsystem with ac power
supply and fan unit CRUs.
AC power recovery: After a total ac power failure, after normal power is restored,
the storage subsystem performs power-up recovery procedures automatically
without operator intervention.
Power cords and receptacles: The storage subsystem ships with two jumper
cords used to connect to the rack PDU. You must purchase the power cords that
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are appropriate for use in a typical outlet in the destination country. See
Appendix C, “Power cords,” on page 199 for more information.
Power and site wiring requirements for models with dc power
supply and fan units
The storage subsystem uses wide-ranging redundant power supplies that
automatically accommodate voltages to the dc power source. The dc power
supplies require a reliably grounded safety extra low voltage SELV source and an
approved and rated disconnect device for the -48V line.
The agency rating for the DS4700 Express Storage Subsystem (dc models) is 16
amps at -42V to -60V dc. This is the overall maximum operating current for the
DS4700 Express Storage Subsystem with dc power supply and fan unit CRUs.
DC power recovery: After a total dc power failure, after normal power is restored,
the storage subsystem performs power-up recovery procedures automatically
without operator intervention.
Power cords and receptacles: The storage subsystem ships with two dc power
jumper cables used to connect to the dc power source. See “Cabling the dc power
supply for dc models” on page 111 for more information.
Heat output, airflow, and cooling
specifications.
Note: In general, disk subsystem reliability tends to decrease as the ambient
temperature of the environment in which it is being used increases. The
ambient temperature in the immediate area of the disk enclosure unit should
be kept near 22° C (72° F), or lower, to provide better reliability.
When racks that contain many storage subsystems are to be installed together, the
following requirements must be met to ensure that the storage subsystems are
adequately cooled:
v Air enters at the front of the rack and leaves at the back. To prevent the air that
is leaving the rack from entering the intake of another piece of equipment, you
must position the racks in alternate rows, back-to-back and front-to-front. This
arrangement is known as “cold aisle/hot aisle” and is shown in Figure 16 on page
v Where racks are in rows, each rack must touch the rack that is next to it to
reduce the amount of hot air that can flow around from the back of the rack into
the intakes of the storage expansion enclosures that are in that rack. You should
use Suite Attach Kits to completely seal any gaps that remain between the racks.
For details about Suite Attach Kits, contact your marketing representative.
v Where racks are in rows front-to-front or back-to-back, a gap of at least 1220 mm
(48 in.) must separate the rows across the cold aisle.
v To ensure correct airflow in each rack, the rack filler plates must be installed in
unused positions. Also, all the gaps in the front of the racks must be sealed,
including the gaps between the storage subsystems.
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back
front
T42 racks
Perforated tiles
or gratings
1220 mm cold
aisle width
Cold aisle
T42 racks
front
back
2440 mm between
center lines of hot
and cold aisle
Hot aisle
back
front
T42 racks
Airflow
Figure 16. Example of cold aisle/hot aisle rack configuration
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Chapter 2. Installing the storage subsystem
This chapter provides the information that you need to install the storage subsystem
into a rack cabinet.
Before you begin the installation, review the safety information in “Safety” on page
“Installation overview” provides an overview of the entire storage subsystem
installation process. Read this overview before you begin the installation.
Installation overview
Statement 4:
≥ 18 kg (39.7 lb)
≥ 32 kg (70.5 lb)
≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
Attention: A fully configured DS4700 Express weighs up to 40 kg (88 lb). At least
two other people should help you lift the DS4700 Express from the shipping box. If
desired, open the sides of the shipping box and remove the CRUs from the DS4700
Express before you lift it from the shipping box in order to lighten the storage
subsystem. See “Removing the CRUs” on page 40.
The following steps summarize the DS4700 Express installation process. Each step
below is detailed in this chapter or next two chapters, Chapter 3, “Cabling the
4. Fold down and open the sides of the shipping box. Without removing the
DS4700 Express from box, you can remove the DS4700 Express rack
mounting rails and hardware from the box. The DS4700 Express rack
mounting rails and hardware are placed on the bottom of the shipping box
(under the DS4700 Express Storage Subsystem). Install the support rails in the
rack cabinet. See “Installing the support rails” on page 36.
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5. Before removing the DS4700 Express from the shipping box, remove the
components from the DS4700 Express chassis to lighten the unit. See
6. Record the serial number, machine type and model number, and RAID
controller MAC addresses for your DS4700 Express Storage Subsystem in
The serial number, machine type, and model number are located on the left
edge of the front unit as shown in Figure 17.
Serial number
Machine type
Model number
Figure 17. Example of DS4700 Express serial number, machine type, and model number
location
The MAC addresses are located near the Ethernet ports on each RAID
controller.
7. Install and secure the DS4700 Express chassis in the rack cabinet. See
8. If needed, replace the components in the installed DS4700 Express chassis.
9. Install in the rack cabinet the DS4000 storage expansion enclosure or
enclosures you will cable to the DS4700 Express. Follow the instructions in the
Installation, User’s, and Maintenance Guide for your DS4000 storage
expansion enclosure to set up and mount the storage expansion enclosures.
Attention
Before powering on the DS4700 Express Storage Subsystem, it must be
populated with at least two E-DDMs. If at least two E-DDMs are not
installed in each attached storage expansion enclosure or DS4700
Express Storage Subsystem, when you power on the DS4700 Express
and its attached storage expansion enclosures, your standard storage
partition key might be lost and must be regenerated using instructions on
the IBM DS4000 Solutions and Premium Features Web site:
In addition, the resulting insufficient load to the enclosure power supplies
might cause them to intermittently appear as failed, falsely indicating the
power supplies are bad. All E-DDMs in the DS4700 Express Storage
Subsystem and the connected storage expansion enclosure or
enclosures must contain no prior configuration data.
10. Use SFP modules and fibre channel cables to cable the DS4700 Express to
the DS4000 storage expansion enclosure or enclosures. See “Connecting
11. Set the enclosure IDs for all storage expansion enclosures in the configuration.
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Note: Perform this step if the attached storage expansion enclosures are
EXP710s or EXP100s only. The EXP810 storage expansion enclosure
IDs are automatically set by the controllers to be unique when they are
cabled together.
12. Perform one of the following cabling tasks to enable management of the
DS4700 Express configuration:
v If you are using out-of-band management, cable the DS4700 Express
Ethernet ports to either the management workstation or the host.
v If you are using in-band management, cable the DS4700 Express host
channels to the fibre channel host bus adapters (HBAs) in either the hosts
or the fibre channel switch that connects to the host HBAs. See “Connecting
14. Power on the attached storage expansion enclosure and the DS4700 Express
Storage Subsystem using the procedure described in “Powering on the storage
15. Install the DS4000 Storage Manager host software on the management
workstation (for out-of-band management) or on the host (for in-band
management). Refer to the IBM System Storage DS4000 Storage Manager
Version 10 Installation and Host Support Guide for the appropriate operating
system for instructions on how to install the DS4000 Storage Manager host
software.
16. Use the DS4000 Storage Manager host software to verify the configuration.
Handling static-sensitive devices
Attention: Static electricity can damage electronic devices and your system. To
avoid damage, keep static-sensitive devices in their static-protective packages until
you are ready to install them.
To reduce the possibility of electrostatic discharge (ESD), observe the following
precautions:
v Limit your movement. Movement can cause static electricity to build up around
you.
v Handle the device carefully, holding it by its edges or its frame.
v Do not touch solder joints, pins, or exposed printed circuitry.
v Do not leave the device where others can handle and possibly damage the
device.
v While the device is still in its static-protective package, touch it to an unpainted
metal part of the system unit for at least two seconds. This drains static electricity
from the package and from your body.
v Remove the device from its package and install it directly into your system unit
without setting it down. If it is necessary to set the device down, place it in its
static-protective package. Do not place the device on your system unit cover or
on a metal table.
v Take additional care when handling devices during cold weather because heating
reduces indoor humidity and increases static electricity.
Chapter 2. Installing the storage subsystem 33
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Preparing for installation
Before installing the DS4700 Express Storage Subsystem, create a detailed plan of
how this unit will be used in your storage configuration. The plan should include
determining RAID levels, fallover requirements, operating systems to be used, and
total storage capacity requirements.
Complete the following steps to prepare the DS4700 Express Storage Subsystem
for installation into a rack cabinet:
1. Prepare the site to meet all area, environmental, power, and site requirements.
For more information, see “Specifications” on page 22.
2. Move the shipping box that contains the DS4700 Express to the site.
Statement 4:
≥ 18 kg (39.7 lb)
≥ 32 kg (70.5 lb)
≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
3. Remove the mounting rails, mounting hardware, and line jumper cords from the
DS4700 Express shipping box. Do not remove the DS4700 Express from the
shipping box at this time.
Attention: The mounting rails, mounting hardware, and line jumper cords may
be packed beneath the DS4700 Express in the shipping box. To remove these
items from the shipping box without first removing the DS4700 Express, open
the two long sides of the shipping box. Then open and fold flat the two short
sides of the shipping box. This enables you to access the mounting rails,
mounting hardware, and line jumper cords without first removing the DS4700
Express from the shipping box.
After you open the DS4700 Express shipping container and remove the
mounting rails, mounting hardware, and line jumper cords, check the remaining
Express from the shipping box. If any items are missing, contact your IBM
reseller or representatives before proceeding.
4. Verify that you have the appropriate host software kit for your operating system.
Depending on the DS4700 Express model you order, your DS4700 Express will
ship with either the Microsoft Windows host software attachment kit or with your
choice of host software kits (Windows, AIX, Linux, Netware, SUN Solaris,
HP-UX, Linux on POWER, or VMware). The host software kit grants you
permission to attach host servers using the appropriate operating system to the
DS4700 Express.
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The kit includes a DS4000 Storage Manager Support CD that has the
appropriate IBM DS4000 Storage Manager host software. If you order more
than one host software kit, the additional kits may also be shipped in the
DS4700 Express shipping box.
The CD also includes the DS4000 Storage Subsystem controller firmware. For
the latest controller firmware, check the IBM support Web site for DS4000
storage products:
5. Read the appropriate readme files that are included in the Storage Manager
host software or DS4700 Express controller firmware packages for any updated
information about hardware, software, or firmware products. See “Finding
DS4000 readme files” on page xxvii to learn how to access the DS4000 readme
files on the Web.
Tools and hardware required
Gather the tools and equipment you will need for installation. These might include:
v Region-specific power cords required for the DS4700 Express
v 5/16 (8 mm) hex nut driver
v #2 Phillips screwdriver
v Antistatic protection (such as a grounding wrist strap)
v Fibre channel (FC) and Ethernet interface cables and cable straps
v Rack power jumper cords that are shipped with the DS4700 Express
v SFP modules
v Rack-mounting hardware that ships with the DS4700 Express
Preparing the site
This section lists the floor space requirements and weight information for the
storage subsystem. For information on interface cables and connections, see
Floor space: The floor area at the installation site must provide the following
conditions:
v Sufficient space to install the storage subsystem
v Enough stability to support the weight of the fully configured storage subsystem
Ensure that all requirements, such as floor space, air conditioning, and electrical
service, have been met. Other site preparation activities include the following tasks:
v To ensure that there is enough room to move around the cabinet and install
modules, clear space at the installation area.
v Install uninterruptible power supply (UPS) devices.
v If applicable, install host servers with fibre channel host bus adapters (HBAs),
fibre channel switches, or other devices.
v Route interface cables from the fibre channel HBA ports in the hosts or fibre
channel switches to the installation area.
v Route main power cords to the installation area.
Continue with “Preparing the rack cabinet” on page 36.
Chapter 2. Installing the storage subsystem 35
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Preparing the rack cabinet
Important: Before you install the storage subsystem in a rack cabinet, keep in mind
the following considerations:
v Review the documentation that comes with your rack enclosure for safety and
cabling considerations.
v Install the storage subsystem in a recommended 22° C (72° F) environment. See
v To ensure proper airflow, do not block the air vents; ensure at least 15 cm (6 in.)
of air space.
v To ensure rack stability, load the rack starting at the bottom.
v If you install multiple components in the rack, do not overload the power outlets.
v Always connect the storage subsystem to a properly grounded outlet.
v Always connect the IBM-certified rack power distribution units (PDUs) to at least
two independent power circuits or sources.
Complete the following steps to prepare the rack cabinet before you install the
storage subsystem:
1. Move, unpack, and level the rack at the installation site (if needed).
2. Remove the external rack panels.
3. If necessary, stop all I/O activity to the devices in the rack.
4. If necessary, turn off all drive enclosure and rack power. Disconnect existing
power, network, and other external cables.
5. Install any additional interface cables and power cables.
After you have completed these steps, continue with “Installing the support rails.”
Installing the support rails
Attention: Duplicate copies of the rack mounting templates are provided in
Appendix B, “Rack mounting template,” on page 195. If you want to tear out the
templates from this document for easier use, use the copies in Appendix B, “Rack
mounting template,” on page 195 rather than the copies provided in this section.
identify the proper locations for inserting M5 screws when mounting the support
rails and DS4700 Express Storage Subsystem to a rack cabinet. The locations for
the M5 screws are highlighted in the templates.
Hold the appropriate template up to each side of the rack cabinet at the 3-U section
where you will install the DS4700 Express. U boundaries are shown as horizontal
dashed lines in the rack mounting templates. The highlighted squares on each side
of the template mark the positions where you will thread the M5 screws that secure
the rails and the DS4700 Express to the front and rear of the cabinet.
Note: The mounting holes that are shown in the following templates are square.
The holes in your rack might be round, square, or threaded.
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3 U
3 U
DS4700
FRONT
Bezel
Bezel
(Front Left)
Install second --->
Rack Mounting(Front Right)
Template
Install first --->
<--- Install first
2 U
2 U
Install first --->
<--- Install first
1 U
1 U
Rail assembly
(Front Left)
Rail assembly
(Front Right)
Install second --->
0 U
0 U
Figure 18. Front rack mounting template
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3U
2U
1U
0U
3U
2U
1U
DS4700
REAR
Rack Mounting
Template
Rail mounting guide
Rail assembly
(Rear Left)
Rail assembly
(Rear right)
®
Printed in the U.S.A
0U
Figure 19. Rear rack mounting template
Before installing the DS4700 Express in a rack cabinet, you must install the rails
and rack-mounting hardware that come with your storage subsystem. The DS4700
Express requires an Electronic Industries Association (EIA) 310-D Type A 19-inch
rack cabinet. The distance between EIA rails, from the front to the rear of the rack,
is 60.96 cm (24 in.) minimum and 81.28 cm (32 in.) maximum. This rack conforms
to the EIA standard. Where you place the support rails in the rack depends on
where you intend to position the storage subsystem.
Complete the following steps to install the support rails:
1. Ensure that the rack cabinet has already been installed.
2. Ensure that a stabilizer has been correctly attached to the bottom front of the
rack to prevent the rack from tipping forward while the DS4700 Express is
being installed.
Refer to the installation and service guide, or equivalent, for the rack as
required.
3. Locate the two support rails, eight of the twelve M5 screws, and eight washers
that are supplied with the DS4700 Express.
Note: The M5 screws and washers may already be attached to the support
rails. If so, remove them from the support rails.
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4. The rack-mounted unit is three EIA units high. Decide accordingly where you
are going to install the support rails.
installing the support rails into the rack.
Note the following considerations before you choose where to install the rails:
v If you are installing the DS4700 Express into an empty rack, install it into
the lowest available position so that the rack does not become unstable.
v If you are installing more than one DS4700 Express in the rack, start at the
lowest available position, and work upward.
v If appropriate, allow for possible later installation of other units.
v If necessary, remove the rack power distribution unit before you install the
support rails.
v For procedures and more information, refer to the installation and service
guide, or equivalent, for the rack.
v The lip on the rail should line up with the bottom of the storage subsystem
(the 0U boundary in Figure 19 on page 38).
5. Using a #2 Phillips screwdriver, loosen the two screws on the left support rail
that hold the two parts of the rail together (ꢀ5ꢁ).
Note: The support rails are not marked as left or right. However, each rail can
be correctly mounted on only one side of the rack cabinet. The rails
should be mounted with the alignment pins at the back of the rack.
Figure 20 on page 40 shows the installation of the left support rail.
6. Hold the back of the rail against the inside of the rack-mounting flange. Make
sure the rail mounting guide pins are in the correct holes. See Figure 19 on
page 38 for an illustration.
7. Using the 5/16 (8 mm) hex nut driver, securely tighten the two M5 screws
(ꢀ2ꢁ).
Note: Make sure you use a washer when installing an M5 screw through a
square hole on the rack-mounting flange.
8. Extend the rail to the front of the rack until it makes contact with the front
rack-mounting flange (ꢀ3ꢁ).
9. Securely tighten the M5 screws (ꢀ1ꢁ).
10. Securely tighten the two screws on the left support rail that hold the two parts
of the rail together (ꢀ5ꢁ).
Note: Because the mounting holes on the rack are not always the same size
as the mounting screws, the lip (ꢀ6ꢁ) of each of the support rails may
not line up evenly. Make minor adjustments as needed to ensure that
the lip of the left and right support rails are lined up evenly on the racks.
Failure to do so will cause the storage subsystem to fit unevenly in the
rack.
Chapter 2. Installing the storage subsystem 39
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1
3
4
5
2
6
Rear of Rack
Figure 20. Installing the support rails
Installing the DS4700 Express
This section provides instructions on installing the DS4700 Express. The installation
process includes:
Removing the CRUs
This section describes how to remove the CRUs to minimize the weight of the
DS4700 Express before you install it in the rack. However, if you have three or
more people available to lift and install the DS4700 Express in a rack, you might
not find it necessary to remove the CRUs before you install the DS4700 Express. If
this is the case, you can skip the CRU removal instructions provided in this section.
Instead, continue with “Installing the DS4700 Express into a rack on the support
rails” on page 46, and then skip the CRU replacement instructions provided in
Attention: IBM strongly recommends that you remove CRUs from the DS4700
Express chassis to lessen the weight to make it easier to transfer the DS4700
Express Storage Subsystem from the shipping box to the rack.
Use the following procedures to remove the CRUs from the DS4700 Express before
installation. Use these instructions after you have completed all applicable site,
installed the support rails (as listed in “Installing the support rails” on page 36).
Alternately, if necessary, you can use these instructions to lighten the DS4700
Express before removing it from the shipping box. The shipping box opens to
provide access to the storage subsystem CRUs.
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The DS4700 Express comes with a rack-mounting hardware kit for installing it in a
rack. It is easier to lift the DS4700 Express and install it in a rack cabinet if you
remove all the CRUs first. You will need an antistatic wrist strap and a cart or level
surface (to hold the CRUs). Observe the precautions listed in “Handling
In the following procedure, you will remove the following CRUs from the storage
subsystem before you install it in the rack:
v Controllers
v AC power supply and fan units (Models 70A, 70H, 72A, and 72H)
v DC power supply and fan units (Models 70S, 70T, 72S, and 72T)
v Hot-swap E-DDMs
You do not need to remove the blank trays.
Statement 4:
≥ 18 kg (39.7 lb)
≥ 32 kg (70.5 lb)
≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
Attention: The storage subsystem comes with a bezel that is attached to the front
of the unit. The bezel protects the light pipes that are located above the drive trays.
Leave the protective bezel in place until you are instructed to remove it.
Removing a controller
Complete the following steps to remove a controller:
1. Squeeze the controller latch and pull the lever open 90° (so that the lever is
horizontal) to release the controller from the latch. The controller latch is a coral
colored tab on the lever.
Note: The lever rotates upward or downward 90°, depending on whether the
controller you are removing is the right or left controller CRU.
2. Slowly pull the lever away from the chassis to remove the controller from the
bay, as shown in Figure 21 on page 42.
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ds470010
Lever
Figure 21. Removing and replacing a controller
3. Place the controller on a level surface.
Removing an ac power supply and fan unit
Statement 5:
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
2
1
CAUTION:
Disconnect the power cord before removing the power supply and fan unit.
Complete the following steps to remove a power supply and fan unit:
1. Squeeze the latch and pull the lever open 90° (so that the lever is horizontal) to
release the power supply and fan unit from the latch. The latch is a coral
colored tab on the lever.
2. Slowly pull the lever away from the chassis to remove the power supply and fan
unit, as shown in Figure 22 on page 43.
Note: The lever rotates upward or downward 90°, depending on whether the
power supply and fan unit you are removing is in the left or right power
supply and fan unit bay.
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Lever
Figure 22. Removing a power supply and fan unit
3. Place the power supply and fan unit on a level surface.
Removing a dc power supply and fan unit
CAUTION:
This unit has more than one power source. To remove all power from the unit,
all dc MAINS must be disconnected.
Statement 29:
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CAUTION:
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment.
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment. If this
connection is made, all of the following conditions must be met:
v This equipment shall be connected directly to the dc supply system
earthing electrode conductor or to a bonding jumper from an earthing
terminal bar or bus to which the dc supply system earthing electrode
conductor is connected.
v This equipment shall be located in the same immediate area (such as,
adjacent cabinets) as any other equipment that has a connection between
the earthed conductor of the same dc supply circuit and the earthing
conductor, and also the point of earthing of the dc system. The dc system
shall not be earthed elsewhere.
v The dc supply source shall be located within the same premises as this
equipment.
v Switching or disconnecting devices shall not be in the earthed circuit
conductor between the dc source and the point of connection of the
earthing electrode conductor.
Statement 30:
CAUTION:
To reduce the risk of electric shock or energy hazards:
v This equipment must be installed by trained service personnel in a
restricted-access location, as defined by the NEC and IEC 60950-1, First
Edition, The Standard for Safety of Information Technology Equipment.
v Connect the equipment to a reliably grounded safety extra low voltage
(SELV) source. An SELV source is a secondary circuit that is designed so
that normal and single fault conditions do not cause the voltages to exceed
a safe level (60 V direct current).
v The branch circuit overcurrent protection must be rated 20 A.
v Use 12 American Wire Gauge (AWG) or 2.5 mm2 copper conductor only, not
exceeding 4.5 meters in length.
v Incorporate a readily available approved and rated disconnect device in the
field wiring.
CAUTION:
Disconnect the power cord before removing the dc power supply and fan unit.
Complete the following steps to remove a dc power supply and fan unit:
1. Squeeze the latch and pull the lever open 90° (so that the lever is horizontal) to
release the dc power supply and fan unit from the latch. The latch is a coral
colored tab on the lever.
2. Slowly pull the lever away from the chassis to remove the dc power supply and
fan unit, as shown in Figure 23 on page 45.
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Note: The lever rotates upward or downward 90°, depending on whether the dc
power supply and fan unit you are removing is in the left or right dc
power supply and fan unit bay.
Figure 23. Removing a dc power supply and fan unit
3. Place the dc power supply and fan unit on a level surface.
Removing an E-DDM
Complete the following steps to remove a hot-swap E-DDM:
Note: The E-DDM comes installed in a drive tray. Do not attempt to detach the
E-DDM from the tray.
must record this information to be able to replace the E-DDMs in their original
order before they were removed.
2. Release the latch on the E-DDM CRU by pressing on the inside of the bottom
of the tray handle.
3. Lift the closed latch to its open position. (The latch is at a 90° angle to the front
of the E-DDM when open.)
Chapter 2. Installing the storage subsystem 45
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Figure 24. Removing a E-DDM CRU
5. Place the E-DDM CRU horizontally on a level surface.
Attention: Do not stack E-DDM CRUs on top of one another. Protect the
E-DDM CRUs from vibrations or sudden shocks.
Installing the DS4700 Express into a rack on the support rails
Complete the following steps to install the DS4700 Express in the rack cabinet.
CAUTION:
Do not install modules or other equipment in the top half of a rackmount
cabinet while the bottom half is empty. Doing so can cause the cabinet to
become top-heavy and tip over. Always install hardware in the lowest
available position in the cabinet.
Statement 4:
≥ 18 kg (39.7 lb)
≥ 32 kg (70.5 lb)
≥ 55 kg (121.2 lb)
CAUTION:
Use safe practices when lifting.
1. Put on antistatic protection, and keep it on while performing all of the remaining
procedures in this chapter.
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2. Using a #2 Phillips screwdriver, remove the four screws from the rails (two
these screws, the storage subsystem will not fit securely.
Note: If the screws are shipped in the hardware pack instead of already
installed in the rails, skip this step and go to step 3.
3. Place the storage subsystem in the rack.
Note: If you have removed the CRUs from the DS4700 Express, you should be
able to lift the unit into the cabinet with the help of one other person. If
you have not removed the CRUs before the installation, you should have
at least two other people available to help you lift the DS4700 Express
into the rack.
a. Move the storage subsystem to the front of the rackmount cabinet.
b. With help from another person, place the back of the storage subsystem on
the support rails, and then slide the unit into the rack as shown in Figure 25.
Front of Rack
Figure 25. Installing the DS4700 Express
storage subsystem to the rack.
a. Align the front mounting holes on each side of the storage subsystem with
the mounting holes on the front of the support rails.
of the DS4700 Express to the rack rails.
c. Secure the front of the DS4700 Express using the four M5 screws as shown
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Figure 26. Securing the DS4700 Express to the rack cabinet
5. Continue with one of the following actions:
v If you did remove the DS4700 Express CRUs before installation (as
v If you did not remove the DS4700 Express CRUs before installation, continue
Replacing the components
If you removed components from the DS4700 Express Storage Subsystem before
you installed it into a rack cabinet, use the following procedures to replace the
components in the DS4700 Express after it is installed successfully in a rack
cabinet.
Replacing a controller
Complete the following steps to replace the controller that you removed before the
installation:
Attention: After you remove an controller, wait 70 seconds before reseating or
replacing the controller. Failure to do so may cause undesired events. The left and
right controllers are seated in the DS4700 Express chassis in opposite orientations.
If you cannot fully insert the controller into the controller bay, flip it 180° and reinsert
it.
1. Slide one controller into the empty slot in the storage subsystem. Be sure that
the lever is pulled straight out as you slide the controller in, as shown in
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Notch
Guide pin
Lever
Figure 27. Removing and replacing a controller
2. As you slide the controller into the empty slot, make sure the guide pins on the
side of the controller fit into the notches. After the guide pins fit into the notches
and the controller fits snugly into the bay, push the lever downward or upward
90°, depending on whether the controller is inserted in the A or B controller bay
to fully latch it into place. Do not force fit. The controller is designed to prevent it
from being inserted into the chassis incorrectly.
Attention: Make sure that the levers lock into place in the storage subsystem
chassis.
Replacing an ac power supply and fan unit
Statement 5:
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
2
1
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CAUTION:
Disconnect the power cord before replacing the power supply and fan unit.
Complete the following steps to replace the power supply and fan units that you
removed before the installation:
1. Slide one power supply and fan unit into the storage subsystem. Be sure to
replace the power supply and fan units so that the lever on each power supply
and fan unit opens toward the interior of the storage subsystem, as shown in
Figure 28. Do not force fit. The power supply and fan unit is designed to prevent
it from being inserted into the chassis incorrectly.
Attention: Be sure that the lever is pulled straight out as you slide the power
and right power supply and fan units are seated in the DS4700 Express chassis
in opposite orientations. If you cannot fully insert the power supply and fan unit
into the power supply and fan unit bay, flip it 180° and reinsert it.
Lever
Figure 28. Replacing a power supply and fan unit
2. As you slide the power supply and fan unit into the empty slot, make sure the
guide pins on the side of the power supply and fan unit fit into the notches
along the sides of the power supply and fan unit bay. After the guide pins fit into
the notches and power supply and fan unit fits snugly into the slot, push the
lever upward or downward 90° depending on whether the power supply fan is
inserted in the left or right bay to fully latch it into place. Then gently push the
front of the power supply and fan unit to ensure that it is fully seated.
Replacing a dc power supply and fan unit
Statement 29:
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CAUTION:
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment.
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment. If this
connection is made, all of the following conditions must be met:
v This equipment shall be connected directly to the dc supply system
earthing electrode conductor or to a bonding jumper from an earthing
terminal bar or bus to which the dc supply system earthing electrode
conductor is connected.
v This equipment shall be located in the same immediate area (such as,
adjacent cabinets) as any other equipment that has a connection between
the earthed conductor of the same dc supply circuit and the earthing
conductor, and also the point of earthing of the dc system. The dc system
shall not be earthed elsewhere.
v The dc supply source shall be located within the same premises as this
equipment.
v Switching or disconnecting devices shall not be in the earthed circuit
conductor between the dc source and the point of connection of the
earthing electrode conductor.
Statement 30:
CAUTION:
To reduce the risk of electric shock or energy hazards:
v This equipment must be installed by trained service personnel in a
restricted-access location, as defined by the NEC and IEC 60950-1, First
Edition, The Standard for Safety of Information Technology Equipment.
v Connect the equipment to a reliably grounded safety extra low voltage
(SELV) source. An SELV source is a secondary circuit that is designed so
that normal and single fault conditions do not cause the voltages to exceed
a safe level (60 V direct current).
v The branch circuit overcurrent protection must be rated 20 A.
v Use 12 American Wire Gauge (AWG) or 2.5 mm2 copper conductor only, not
exceeding 4.5 meters in length.
v Incorporate a readily available approved and rated disconnect device in the
field wiring.
CAUTION:
Disconnect the power cord before replacing the power supply and fan unit.
CAUTION:
This unit has more than one power source. To remove all power from the unit,
all dc MAINS must be disconnected.
Chapter 2. Installing the storage subsystem 51
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Complete the following steps to replace the dc power supply and fan units that you
removed before the installation:
1. Slide one dc power supply and fan unit into the storage subsystem. Be sure to
replace the dc power supply and fan unit so that the lever on each dc power
supply and fan unit opens toward the interior of the storage subsystem, as
designed to prevent it from being inserted into the chassis incorrectly.
Attention: Be sure that the lever is pulled straight out as you slide the dc
power supply and fan unit into the storage subsystem, as shown in Figure 29.
The left and right dc power supplies are seated in the DS4700 Express chassis
in opposite orientations. If you cannot fully insert the dc power supply and fan
unit into the dc power supply and fan unit bay, flip it 180° and reinsert it.
Figure 29. Replacing a dc power supply and fan unit
2. As you slide the dc power supply and fan unit into the empty slot, make sure
the guide pins on the side of the dc power supply fit into the notches along the
sides of the dc power supply bay. After the guide pins fit into the notches and dc
power supply fits snugly into the slot, push the lever upward or downward 90°
depending on whether the dc power supply is inserted in the left or right bay to
fully latch it into place. Then gently push the front of the dc power supply to
ensure that it is fully seated.
Replacing an E-DDM
Complete the following steps to replace the hot-swap E-DDMs that you removed
before the installation.
Attention: After you remove a E-DDM CRU, wait 70 seconds before replacing or
reseating the E-DDM CRU to allow the E-DDM to properly spin down. Failure to do
so may cause undesired events.
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E-DDMs.
1. Lift up on the handle and gently push the E-DDM CRU into the empty bay until
the hinge of the tray handle latches beneath the storage subsystem bezel, as
shown in Figure 30.
Figure 30. Replacing an E-DDM
2. Push the tray handle down until the latch clicks into place.
Installing a Telco bezel
Complete the following step to install a bezel on a DS4700 Express Storage
Subsystem if the storage subsystem is shipped with one:
v Grasp the sides of the bezel and snap it onto the DS4700 Express chassis, as
opening in the front of the DS4700 Express chassis.
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Chapter 3. Cabling the storage subsystem
After the storage subsystem is installed in its permanent location, you must cable it
to hosts, drives, and other external devices, depending on your hardware
configuration.
This chapter addresses the following cabling and configuration topics:
Enclosure ID settings
The enclosure ID, comprised of two seven-segment numbers, is located on the
back of each controller next to the indicator lights. It provides a unique identifier for
each enclosure in the DS4000 storage subsystem configuration.
The controller automatically sets the enclosure ID number. You can change the
setting through the storage management software if necessary. Both controller
enclosure ID numbers are identical under normal operating conditions. Each
storage expansion enclosure (including the DS4700 Express Storage Subsystem) in
the DS4000 storage subsystem configuration must have a unique storage enclosure
ID. In addition, the single digits (x1) of the enclosure IDs of all storage expansion
enclosures (including the DS4700 Express Storage Subsystem) in the redundant
drive channel/loop pair must be unique.
The allowable ranges for enclosure ID settings are 0-99. However, IBM
recommends that you do not set the enclosure ID to 00 or any number less than
80. The DS4700 Express enclosure ID is normally set to a value of 85 at the
factory.
Figure 32 on page 56 shows the enclosure ID on models 70 and 72.
© Copyright IBM Corp. 2010
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1
1
1
ds470005
1
Figure 32. Storage subsystem seven-segment enclosure ID on models 70 and 72
Number
Description
1
Enclosure ID
Fibre-channel loop and ID settings
When you install a hard disk drive in the storage subsystem, the drive tray plugs
into a printed circuit board called the midplane. The midplane sets the fibre-channel
loop ID automatically, based on the enclosure ID switch setting and the physical
location (bay) of the hard disk drive.
Working with SFPs and fiber-optic cables
Each RAID controller has up to four single-ported host channel connections
(depending on the model) and two dual-ported drive channel connections. You use
a small-form factor pluggable transceiver (SFP) to connect each host channel port
and drive channel port to hosts and storage expansion enclosures. The SFP is
inserted into the port, and then a fiber-optic cable is inserted into the SFP. The
other end of the fiber-optic cable connects to an external device. SFPs are laser
products.
Statement 3:
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CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:
v Do not remove the covers. Removing the covers of the laser product could
result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.
v Use of controls or adjustments or performance of procedures other than
those specified herein might result in hazardous radiation exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser
diode. Note the following.
Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.
Handling fibre-optic cables
Attention: To avoid damage to your fibre-optic cables, follow these guidelines:
v For devices on slide rails, leave enough slack in the cables so they do not bend
to a diameter of less than 76 mm (3 in.), or a radius less than 38 mm (1.5 in.),
when extended or become pinched when retracted.
v Do not overtighten the cable straps or bend the cables to a diameter of less than
76 mm (3 in.), or a radius less than 38 mm (1.5 in.).
v When storing excess or unused fibre-optic cables, do not bend the cables to a
diameter of less than 76 mm (3 in.), or a radius less than 38 mm (1.5 in.) or wrap
them around themselves. See Figure 33 on page 58.
v Loop diameter of 76 mm (3 in.) and bend radius of 38 mm (1.5 in.) for fibre-optic
cables are IBM DS4000 recommended minimums. Loops or bends smaller than
this recommendation may cause damage to your fiber optic cables. It is best
practice to use loop diameters and bend radii that are greater than these
recommended minimums.
v Do not route the cable along a folding cable-management arm.
v Route the cable away from places where it can be damaged by other devices in
the rack cabinet.
v Do not put excess weight on the cable at the connection point. Be sure that the
cable is well supported.
v Do not use plastic cable ties in place of the provided cable straps.
v The following are the supported maximum cable lengths:
– 1 Gbps: 500 meters 50/125 um fiber, 300 meters 62.5/125 um fiber
– 2 Gbps: 300 meters 50/125 um fiber, 150 meters 62.5/125 um fiber
– 4 Gbps: 150 meters 50/125 um fiber, 70 meters 62.5/125 um fiber
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1.5 inch
(38 mm)
radius
3.0 inch
(76 mm)
diameter
Figure 33. Recommended bending and looping specifications for fibre-optic cables
Installing SFP modules
The DS4700 Express requires SFP modules. SFP modules convert electrical
signals to optical signals that are required for fibre channel transmission to and from
RAID controllers. After you install the SFP modules, you use fibre-optic cables to
connect the DS4700 Express to other fibre channel devices.
Before installing SFP modules and fibre-optic cables, read the following information:
v Do not mix long-wave SFPs and short-wave SFPs on a single storage
subsystem. Use only short-wave SFPs. You can use the DS4000 Storage
Manager client to view the Storage Subsystem Profile to verify that you are not
mixing long-wave and short-wave SFPs.
Attention: In addition, do not use long-wave SFPs or GBICs in any of the fibre
channel ports in the DS4700 Express controllers. (Long-wave SFPs and GBICs
are not supported for use in the DS4700 Express or any of the attached DS4000
storage expansion enclosures.)
v The SFP module housing has an integral guide key that is designed to prevent
you from inserting the SFP module improperly.
v Use minimal pressure when inserting an SFP module into an SFP port. Forcing
the SFP module into a port could cause damage to the SFP module or to the
port.
v You can insert or remove the SFP module while the port is powered on.
v Do not install an SFP in any port that will not have a fibre optic cable attached.
Additionally, it is recommended that you remove any SFP from any port that does
not have fibre optic cables attached.
v The operational or redundant loop performance is not affected when you install
or remove an SFP module.
v You must insert the SFP module into a port before you connect the fiber-optic
cable.
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v You must remove the fiber-optic cable from the SFP module before you remove
more information.
v The maximum operating speed of the fibre channel port is determined by two
factors: the speed of the SFP module that is installed and the speed of the fibre
channel connection. For example, a 2-Gbps SFP that is plugged into a
4-Gbps-capable port will limit the speed of that port to a maximum of 2 Gbps.
Conversely, a 4-Gbps SFP that is plugged into a 2-Gbps-capable port will limit
the speed of the port to a maximum of 2 Gbps.
Attention: Carefully check the SFP's IBM part number, option number, and
FRU part number to identify its speed. There are no physical features that
distinguish a 4 Gbps from a 2 Gbps SFP.
Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:
v Do not remove the covers. Removing the covers of the laser product could
result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.
v Use of controls or adjustments or performance of procedures other than
those specified herein might result in hazardous radiation exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser
diode. Note the following.
Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.
Attention: When you handle static-sensitive devices, take precautions to avoid
damage from static electricity. For details about handling static-sensitive devices,
To install an SFP module, complete the following steps:
1. Remove the SFP module from its static-protective package.
page 60. Save the protective cap for future use.
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Plastic tab
Protective cap
SFP module
Figure 34. SFP module and protective cap
3. Remove the protective cap from the SFP port. Save the protective cap for future
use.
Plastic tab
Protective cap
SFP module
Figure 35. Installing an SFP module into the host port
5. Connect an LC-LC fibre-channel cable. For information about the LC-LC cable,
Removing SFP modules
Complete the following steps to remove the SFP module from the host port:
Attention: To avoid damage to the cable or to the SFP module, make sure that
you unplug the LC-LC fibre-channel cable before you remove the SFP module.
1. Remove the LC-LC fibre-channel cable from the SFP module. For more
information, see “Removing an LC-LC fibre-channel cable” on page 64.
2. Unlock the SFP module latch:
v For SFP modules that contain plastic tabs, unlock the SFP module latch by
pulling the plastic tab outward 10°, as shown in Figure 36 on page 61.
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Plastic tab
Protective cap
10 o
SFP module
Figure 36. Unlocking the SFP module latch - plastic variety
v For SFP modules that contain wire tabs, unlock the SFP module latch by
pulling the wire latch outward 90°, as shown in Figure 37.
Wire
tab
Protective
cap
o
90
SFP
module
Figure 37. Unlocking the SFP module latch - wire variety
3. With the SFP latch in the unlocked position, extract the SFP module.
v For SFP modules that contain plastic tabs, slide the SFP module out of the
port.
v For SFP modules that contain wire tabs, grasp the wire latch and pull the
SFP module out of the mini-hub port.
4. Replace the protective cap on the SFP module.
5. Place the SFP module into a static-protective package.
6. Replace the protective cap on the host port.
Using LC-LC fibre-channel cables
The LC-LC fibre-channel cable is a fiber-optic cable that you use to connect
DS4700 Express fibre channel ports into one of the following devices:
v An SFP module installed in a fibre channel switch port
v An SFP module of the host bus adapter port
v An SFP module installed in an IBM DS4000 storage expansion enclosure
For more information about cabling these devices, see the documentation that
comes with the LC-LC fibre-channel cable.
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Figure 38. LC-LC fibre-channel cable
Connecting an LC-LC cable to an SFP module
Complete the following steps to connect an LC-LC fibre-channel cable to an SFP
module:
Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:
v Do not remove the covers. Removing the covers of the laser product could
result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.
v Use of controls or adjustments or performance of procedures other than
those specified herein might result in hazardous radiation exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser
diode. Note the following.
Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.
2. If necessary, remove the protective cap from the SFP module, as shown in
Figure 34 on page 60. Save the protective cap for future use.
3. Remove the two protective caps from one end of the LC-LC cable, as shown in
Figure 39 on page 63. Save the protective caps for future use.
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Fibre-optic
cable
Protective cap
Figure 39. Removing fiber-optic cable protective caps
4. Carefully insert this end of the LC-LC cable into an SFP module that is installed
in the DS4700 Express. The cable connector is keyed to ensure it is inserted
into the SFP module correctly. Holding the connector, push in the cable until it
clicks into place, as shown in Figure 40.
Figure 40. Inserting an LC-LC fibre-channel cable into an SFP module
5. Remove the two protective caps from the other end of the LC-LC cable. Save
the protective caps for future use.
6. Connect this end of the LC-LC cable to one of the following devices:
v An SFP module that is installed in a separate EXP810 or EXP710 storage
expansion enclosure or other DS4000 storage expansion enclosure
v An SFP module that is installed in a fibre channel switch port
v A fibre channel host bus adapter port
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Removing an LC-LC fibre-channel cable
Complete the following steps to remove an LC-LC fibre-channel cable:
Attention: To avoid damaging the LC-LC cable or SFP module, make sure that
you observe the following precautions:
v Press and hold the lever to release the latches before you remove the cable from
the SFP module.
v Ensure that the levers are in the released position when you remove the cable.
v Do not grasp the SFP module plastic tab when you remove the cable.
1. On the end of the LC-LC cable that connects into the SFP module or host bus
adapter, press down and hold the lever to release the latches, as shown in
Lever
Latches
Figure 41. LC-LC fibre-channel cable lever and latches
2. While pressing down the cable lever, carefully pull on the connector to remove
the cable from the SFP module, as shown in Figure 42.
Figure 42. Removing the LC-LC fibre-channel cable
3. Replace the protective caps on the cable ends.
4. Replace the protective cap on the SFP module.
Using LC-SC fibre-channel cable adapters
The LC-SC fibre-channel cable adapter is a fiber-optic cable that is used to connect
an LC connector into one of the following devices that require SC connectors:
v 1-Gbps fibre channel switch
v Fibre channel host bus adapter
Attention: The DS4700 Express does not support the attachment of storage
expansion enclosures that operate at 1 Gbps, such as the EXP500.
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For more information about connecting to these devices, see the documentation
that comes with the LC-SC fibre-channel cable adapter.
LC connector
SC connector
Figure 43. LC-SC fibre-channel cable adapter
The following sections provide the procedures for properly connecting and removing
an LC-SC fibre-channel cable.
Connecting an LC-SC cable adapter to a device
Complete the following steps to connect an LC-SC fibre-channel cable adapter to a
device:
Statement 3:
CAUTION:
When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or
transmitters) are installed, note the following:
v Do not remove the covers. Removing the covers of the laser product could
result in exposure to hazardous laser radiation. There are no serviceable
parts inside the device.
v Use of controls or adjustments or performance of procedures other than
those specified herein might result in hazardous radiation exposure.
DANGER
Some laser products contain an embedded Class 3A or Class 3B laser
diode. Note the following.
Laser radiation when open. Do not stare into the beam, do not view directly
with optical instruments, and avoid direct exposure to the beam.
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2. Connect one end of an LC-LC cable to an SFP module in the DS4700 Express.
For instructions, see “Using LC-LC fibre-channel cables” on page 61.
3. Remove the two protective caps from the LC connector end of the LC-SC cable
Figure 44. Removing the LC-SC cable adapter protective caps
4. Carefully insert the other end of the LC-LC cable into the LC connector end of
clicks into place.
Figure 45. Connecting an LC-LC cable into the LC-SC cable adapter
5. If you are connecting the DS4700 Express to a 1-Gbps fibre channel switch or
fibre channel host bus adapter, connect the SC connector end of the LC-SC
cable adapter to a Gigabit Interface Converter (GBIC) that is installed in the
1-Gbps fibre channel switch or fibre channel host bus adapter. For more
information about connecting to these devices, see the documentation that
comes with the device.
Removing an LC-LC cable from an LC-SC cable adapter
Complete the following steps to remove an LC-LC cable from an LC-SC cable
adapter:
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Attention: To avoid damaging the LC-LC cable, make sure you press and hold
the lever to release the latches before you remove the cable from an LC-SC cable
adapter. Ensure that both levers are in the released position when removing the
cable. When removing the cable from the SFP module, make sure you do not grasp
the SFP module plastic tab.
1. On the end of the cable that connects into the LC connector end of the LC-SC
cable adapter, press down and hold the lever to release the latches. Figure 46
shows the location of the lever and latches.
Lever
Latches
Figure 46. LC-LC fibre-channel cable lever and latches
2. Carefully pull on the connector to remove it. Make sure you grasp the connector
and not the cable when removing the LC-LC cable from the LC-SC cable
adapter as shown in Figure 47.
Figure 47. Removing the LC-LC fibre-channel cable from an LC-SC fibre-channel cable
adapter
3. Replace the protective caps on the cable ends.
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Connecting storage expansion enclosures to the DS4700 Express
Attention
Before powering on the DS4700 Express Storage Subsystem, it must be
populated with at least two E-DDMs. If at least two E-DDMs are not installed
in each attached storage expansion enclosure or DS4700 Express Storage
Subsystem, when you power on the DS4700 Express and its attached storage
expansion enclosures, your standard storage partition key might be lost and
must be regenerated using instructions on the IBM DS4000 Solutions and
Premium Features Web site:
In addition, the resulting insufficient load to the enclosure power supplies
might cause them to intermittently appear as failed, falsely indicating the
power supplies are bad. All drives in the DS4700 Express Storage Subsystem
and the connected storage expansion enclosure or enclosures must contain
no prior configuration data.
In the initial installation of the DS4700 Express, you can add only new storage
expansion enclosures to the DS4700 Express Storage Subsystem. This means
there must be no existing configuration information on the storage expansion
enclosures that you want to install.
If the storage expansion enclosures that you want to install currently contain logical
drives or configured hot spares, and you want them to be part of the DS4700
Express Storage Subsystem configuration, refer to the IBM System Storage
DS4000 Hard Drive and Storage Expansion Enclosure Installation and Migration
Guide. Improper drive migration might cause loss of configuration and other storage
subsystem problems. Contact your IBM technical support representative for
additional information.
Redundant drive channel pair
Each controller on the DS4700 Express has a drive channel that contains two ports.
The storage expansion enclosures that are connected to these two ports form a
drive channel (also referred to as drive loop in certain DS4000 storage subsystem
models). The maximum number of hard drives that can be installed in one drive
channel is 112. One drive channel from each controller combines to form a
redundant drive channel pair.
Figure 48 on page 69 shows an example of a redundant drive channel pair. If any
component of the drive channel fails, the RAID controllers can still access the
storage expansion enclosures in the redundant drive channel pair.
Note: In the following drive cabling figures, the DS4700 Express graphics are
simplified to show only the drive ports of each controller.
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Left ESM
Right ESM
Right ESM
Left ESM
Left ESM
Right ESM
Drive
Channel 1, port 2
Drive
Channel 2, port 1
Redundant
Drive Channel
pair
DS4700
Drive
Channel 2, port 2
Drive
Channel 1, port 1
Left ESM
Right ESM
Right ESM
Left ESM
Left ESM
Right ESM
Figure 48. Example of a redundant drive channel pair
Overview of steps to connect storage expansion enclosures to a
storage subsystem
To connect storage expansion enclosures to the storage subsystem, perform the
following steps:
Note: The following procedures are for "cold-case" procedures (in which the
DS4700 Express is powered down when storage expansion enclosures are
connected, as in the case of initial installation). For "hot-case" procedures (in
which the DS4700 Express is powered on when storage expansion
enclosures are connected), refer to the IBM System Storage DS4000 Hard
Drive and Storage Expansion Enclosure Installation and Migration Guide.
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1. Follow the instructions in the Installation, User's, and Maintenance Guide for
your DS4000 storage expansion enclosure to set up and mount the storage
expansion enclosures.
2. Select a cabling topology appropriate for the number of storage expansion
enclosures you will connect to the DS4700 Express. If you are connecting
external storage expansion enclosures to the DS4700 Express, ensure that the
storage expansion enclosures are populated with at least two drives before you
power them on. In addition, you must have at least two drives in the DS4700
Express Storage Subsystem before you power it on.
recommended schemes for cabling different numbers of storage expansion
enclosures to the DS4700 Express and to each other (if you are connecting
more than one storage expansion enclosure).
3. After you select the cabling topology for your configuration, follow the cabling
diagram for your chosen topology and perform the steps identified in “DS4700
4. If required, set unique enclosure IDs for all storage expansion enclosures that
are cabled to the DS4700 Express. See “DS4000 storage expansion enclosure
ID settings” on page 97, and then refer to your storage expansion enclosure
installation manual for details on setting the enclosure ID.
The DS4700 Express Storage Subsystem locates the drives in the storage
expansion enclosures after you power on the configuration. Always connect power
to the storage expansion enclosures first and then connect power to the DS4700
Express. After you have powered on the configuration, use the DS4000 Storage
Manager client to check the status of the new drives, correct any errors found, and
configure the new drives.
DS4700 Express Storage Subsystem drive cabling topologies
This section provides preferred cabling topologies for cabling storage expansion
enclosures to the DS4700 Express Storage Subsystem. The cabling topologies
include the following:
Each example provides redundant paths to the drives. If one of these examples is
suitable for your hardware and application, complete the cabling connections as
described by the graphics. If you have hardware other than what is shown in these
examples to include in your topology, use these examples as a starting point for
creating your specific topology.
Attention: The DS4700 Express supports the connection of a maximum of six
storage expansion enclosures per redundant drive channel pair. The DS4700
Express supports one redundant drive channel pair.
If you are using fiber-optic cables, install SFP modules into the ports that will
receive the cables before installing the cables.
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fibre-channel host channels, Ethernet ports, and dual-ported fibre-channel drive
channels at the back of the DS4700 Express Storage Subsystem.
4
3
5
6
1
2
6
5
4
3
Figure 49. DS4700 Express Storage Subsystem (Model 70) ports and controllers
controllers on the DS4700 Express Storage Subsystem (model 70).
Table 23. DS4700 Express Storage Subsystem (Model 70) host ports and drive channels
Number
Description
1
2
3
Controller A
Controller B
Drive Channel 1 - Port 2 on Controller A
Drive Channel 2 - Port 2 on Controller B
Drive Channel 1 - Port 1 on Controller A
4
Drive Channel 2 - Port 1 on Controller B
Host Port 2
5
6
Host Port 1
3
4
5
6
8
7
1
2
3
5
4
8
6
7
Figure 50. DS4700 Express Storage Subsystem (Model 72) ports and controllers
controllers on the DS4700 Express Storage Subsystem (model 72).
Table 24. DS4700 Express Storage Subsystem (Model 72) host ports and drive channels
Number
Description
Controller A
Controller B
1
2
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Table 24. DS4700 Express Storage Subsystem (Model 72) host ports and drive
channels (continued)
Number
Description
3
Drive Channel 1 - Port 2 on Controller A
Drive Channel 2 - Port 2 on Controller B
Drive Channel 1 - Port 1 on Controller A
4
Drive Channel 2 - Port 1 on Controller B
5
6
7
8
Host Port 4
Host Port 3
Host Port 2
Host Port 1
One DS4700 Express and one storage expansion enclosure
If you are cabling one DS4700 Express Storage Subsystem to one storage
cabling diagram. Follow the instructions in “DS4700 Express Storage
schemes” on page 77 for specific cabling instructions.
2
1
Controller A
1
2
Controller B
Right ESM
Left ESM
ds470043
Figure 51. One DS4700 Express and one storage expansion enclosure — Recommended
cabling
One DS4700 Express and two storage expansion enclosures
If you are cabling one DS4700 Express Storage Subsystem and two storage
expansion enclosures, Connect one storage expansion enclosure per controller
can also connect two expansion enclosures together behind a single controller drive
port. Although this is technically correct, use the topology as shown in Figure 52 on
enclosures, you can connect them by continuing the connection from the existing
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redundant drive channel pair.
2
1
Controller A
1
2
Controller B
Right ESM
Right ESM
Left ESM
Left ESM
ds470044
Figure 52. One DS4700 Express and two storage expansion enclosure — Not recommended
cabling
you can connect them by using the additional port of the drive channel.
2
1
Controller A
1
2
Controller B
Right ESM
Right ESM
Left ESM
Left ESM
ds470045
Figure 53. One DS4700 Express and two storage expansion enclosure — Recommended
cabling
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One DS4700 Express and three storage expansion enclosures
If you are cabling one DS4700 Express Storage Subsystem and three storage
2
1
Controller A
1
2
Controller B
Right ESM
Left ESM
Right ESM
Left ESM
ds470049
Right ESM
Left ESM
Figure 54. One DS4700 Express and three storage expansion enclosure — Recommended
cabling
One DS4700 Express and four storage expansion enclosures
If you are cabling one DS4700 Express Storage Subsystem and four storage
2
1
Controller A
1
2
Controller B
Right ESM
Right ESM
Left ESM
Right ESM
Left ESM
Right ESM
Left ESM
Left ESM
ds470050
Figure 55. One DS4700 Express and four storage expansion enclosure — Recommended
cabling
One DS4700 Express and up to six storage expansion
enclosures
If you are cabling one DS4700 Express Storage Subsystem and up to six storage
topology.
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2
1
Controller A
1
2
Controller B
Right ESM
Right ESM
Right ESM
Left ESM
Left ESM
Left ESM
Right ESM
Left ESM
Right ESM
Right ESM
Left ESM
ds470051
Left ESM
ds470051
Figure 56. One DS4700 Express and up to six storage expansion enclosure —
Recommended cabling
Figure 57 on page 76 shows a cabling topology that is not recommended because
all six storage expansion enclosures are connected to a single drive port of the
dual-ported drive channel in each controller.
Chapter 3. Cabling the storage subsystem 75
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2
1
Controller A
1
2
Controller B
Right ESM
Left ESM
Right ESM
Right ESM
Left ESM
Left ESM
Right ESM
Right ESM
Right ESM
Left ESM
Left ESM
Left ESM
ds470051
ds470058
Figure 57. One DS4700 Express and up to six storage expansion enclosure — Not
recommended
One DS4700 Express and two or more storage expansion
enclosures in a mixed configuration
A mixed configuration is a configuration in which you have more than one type of
storage expansion enclosure. If possible, it is recommended that you do not mix
different types of storage expansion enclosures in the same drive channel pair.
Figure 58 on page 77 shows the recommended cabling topology if you have three
EXP710s and three EXP810s attached to the DS4700 Express. (The EXP710s are
denoted in the graphic as ꢀ1ꢁ while the EXP810s are denoted as ꢀ2ꢁ.)
77 is not the recommended cabling topology. Additional cabling rules and
restrictions apply. See “One DS4700 Express and two or more storage
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2
1
Controller A
1
2
Controller B
1
2
Right ESM
Right ESM
Left ESM
Right ESM
Right ESM
Left ESM
Left ESM
Left ESM
Right ESM
Right ESM
Left ESM
Left ESM
ds470046
Figure 58. One DS4700 Express and two or more storage expansion enclosures in a mixed
environment — Recommended cabling
DS4700 Express Storage Subsystem and supported storage expansion
enclosure drive cabling schemes
The following sections show cabling schemes for supported storage expansion
enclosures and the DS4700 Express Storage Subsystem:
Chapter 3. Cabling the storage subsystem 77
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DS4700 Express Storage Subsystem drive cabling rules and
recommendations
Refer to these general rules and recommendations when completing the cabling
steps in the cabling schemes described in this section.
1. Do not connect a combination of more than six EXP810 storage expansion
enclosures to the two ports of a dual-ported drive channel. Failure to observe
this limitation might result in loss of data availability. In the DS4700 Express
Storage Subsystem environment, no more than six EXP810 storage expansion
enclosures can be connected to the two ports of a dual-ported drive channel
because of the internal drive slots in the DS4700 Express Storage Subsystem.
2. Do not connect more than four EXP810 storage expansion enclosures to each
port of a dual-ported drive channel.
3. It is recommended that you add storage expansion enclosures to the storage
subsystem drive ports in a round-robin fashion. For example, if you have four
EXP810s to be cabled to the storage subsystem, instead of cabling all four
EXP810s to one drive port of a drive channel, distribute the enclosures to all
drive ports, which results in one enclosure per drive port of a drive channel.
4. Do not connect more than the recommended maximum number of enclosures
per drive channel, which is eight for EXP810s. When mixing 14-drive storage
expansion enclosures (such as EXP710s and EXP100s) and 16-drive storage
expansion enclosures (such as EXP810s), the maximum number of expansion
enclosures is seven per redundant drive channel pair.
5. The DS4700 Express Storage Subsystem supports the connection of a
maximum of six storage expansion enclosures per redundant drive channel
loop and supports one redundant drive channel loop pair. Failure to observe
this limitation might result in loss of data availability. In the DS4700 Express
Storage Subsystem environment, no more than six EXP810 and/or EXP710 or
EXP100 storage expansion enclosures can be connected to the two ports of a
dual-ported drive channel because of the internal drive slots in the DS4700
Express Storage Subsystem.
6. The DS4700 Express currently supports a maximum of 112 drives in six
16-drive storage expansion enclosures per drive channel in each controller.
One drive channel from each of controllers A and B must be connected to the
same set of storage expansion enclosures to provide drive channel
redundancy. Do not connect a combination of more than six storage expansion
enclosures to the two ports of a single drive channel.
7. When connecting six storage expansion enclosures to a DS4700 Express, use
recommended cabling topology.
8. Connect a maximum of four EXP810s per DS4700 Express controller drive
port.
9. When cabling different types of storage expansion enclosures, it is
recommended that you do not mix different types of storage expansion
enclosures in the same drive channel pair. Also, when mixing different types of
storage expansion enclosures in the same drive channel pair, the Link Rate
Setting must be the same for each storage expansion enclosure. IBM does not
support different enclosure speed settings in the same drive channel. The
EXP810 enclosure speed switch must be set to 2 Gbps when connecting to
DS4300 or DS4500 storage subsystems or EXP100 and EXP710 storage
expansion enclosures.
10. The controller drive ports of the DS4000 storage subsystem controllers must
always be connected to ports labeled 1B in both the right and left ESMs of the
EXP810s in the redundant drive channel/loop pair that is connected to the
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4
3
ESM A
6
ESM B
EXP810
3
4
5
4
3
Port 1A
Port 1B
ESM A
2
ESM B
EXP810
3
4
7
DS4700
1
ds470098
7
Figure 59. DS4700 Express drive ports connected to EXP810 ESM ports labeled 1B
Table 25. DS4700 Express drive ports connected to EXP810 ESM ports labeled 1B
Number
Description
1
2
3
4
5
6
7
DS4700 Express
First EXP810 storage expansion enclosure
ESM Port 1A
ESM Port 1B
Other storage expansion enclosures
Last EXP810 storage expansion enclosure
DS4700 drive port
11. The DS4700 Express drive port must always be connected to the 14-drive
storage expansion enclosure's (EXP710 or EXP100) left ESM IN port of the
last enclosure in the group of enclosures that are cabled in a redundant drive
loop pair. In addition, the DS4700 Express drive port must always be
connected to the 14-drive storage expansion enclosure's right ESM OUT port
of the first enclosure in the group of enclosures that are cabled in a redundant
Chapter 3. Cabling the storage subsystem 79
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storage expansion enclosure's ESM ports.
3
4
3
4
3
4
3
4
Left ESM
Right ESM
Left ESM
Right ESM
6
6
EXP710
EXP100
5
5
3
4
3
4
3
4
3
4
Right ESM
Left ESM
Left ESM
Right ESM
2
2
EXP100
EXP710
7
7
DS4700
DS4700
1
1
ds470100
7
7
Figure 60. DS4700 Express drive ports connected to 14-drive storage expansion enclosure
ESM In and Out ports
Table 26. DS4700 Express drive ports connected to 14-drive storage expansion enclosure
ESM In and Out ports
Number
Description
1
2
3
4
5
6
7
DS4700 Express
First 14-drive storage expansion enclosure
ESM In port
ESM Out port
Other storage expansion enclosures
Last 14-drive storage expansion enclosure
DS4700 drive port
12. The DS4700 Express supports the intermix of SATA and fibre channel E-DDMs
within the same drive enclosure.
One DS4700 Express and one EXP100 storage expansion
enclosure
Figure 61 on page 81 shows the recommended cabling scheme for one DS4700
Express Storage Subsystem and one EXP100 storage expansion enclosure.
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DS4700
1
2
EXP100
ds470034
Figure 61. One DS4700 Express and one EXP100 storage expansion enclosure —
Recommended cabling
Perform the following steps to create the recommended cabling scheme as shown
in Figure 61:
1. Connect either port 2 or port 1 of the dual-ported drive channel 1 in controller A
of the DS4700 Express to the IN port (ꢀ1ꢁ) on the left ESM of the EXP100.
2. Connect either port 1 or port 2 of the dual-ported drive channel 2 in controller B
of the DS4700 Express to the OUT port (ꢀ2ꢁ) on the right ESM of the EXP100.
One DS4700 Express and two EXP100 storage expansion
enclosures
Figure 62 shows the recommended cabling scheme for one DS4700 Express
Storage Subsystem and two EXP100 storage expansion enclosures behind both
ports of a dual-ported drive channel.
DS4700
1
2
1
2
3
4
EXP100
EXP100
ds470037
Figure 62. One DS4700 Express and two EXP100 storage expansion enclosures behind a
pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect port 2 of drive channel 1 on the DS4700 Express to the IN port (ꢀ1ꢁ)
on the left ESM on the first EXP100 (ꢀ3ꢁ).
2. Connect the OUT port (ꢀ2ꢁ) on the right ESM in the first EXP100 (ꢀ3ꢁ) to port 1
of drive channel 1 on the DS4700 Express.
3. Connect port 1 of drive channel 1 on the DS4700 Express to the IN port (ꢀ1ꢁ)
on the left ESM in the second EXP100 (ꢀ4ꢁ).
Chapter 3. Cabling the storage subsystem 81
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4. Connect the OUT port (ꢀ2ꢁ) on the right ESM in the second EXP100 (ꢀ4ꢁ) to
port 2 of drive channel 2 on the DS4700 Express.
One DS4700 Express and three or more EXP100 storage
expansion enclosures
To connect three or more storage expansion enclosures to a DS4700 Express
Storage Subsystem, alternately connect a storage expansion enclosure to one of
the drive ports of the dual-ported drive channel then connect to the other port until
recommended cabling scheme for one DS4700 Express Storage Subsystem and
three EXP100 storage expansion enclosures behind both ports of a dual-ported
drive channel.
DS4700
1
1
2
2
1
2
4
3
5
ds470052
Figure 63. One DS4700 Express and three EXP100 storage expansion enclosures behind a
pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the first EXP100 (ꢀ3ꢁ) to the IN
port (ꢀ1ꢁ) on the left ESM in the third EXP100 (ꢀ5ꢁ).
2. Connect the IN port (ꢀ1ꢁ) on the right ESM in the third EXP100 (ꢀ5ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the first EXP100 (ꢀ3ꢁ).
3. Connect the IN port (ꢀ1ꢁ) on the left ESM in the first EXP100 (ꢀ3ꢁ) to port 2 of
drive channel 1 on the DS4700 Express.
4. Connect port 1 of drive channel 2 on the DS4700 Express to the OUT port (ꢀ2ꢁ)
on the right ESM in the third EXP100 (ꢀ5ꢁ).
5. Connect the IN port (ꢀ1ꢁ) on the left ESM in the second EXP100 (ꢀ4ꢁ) to port 1
of drive channel 1 on the DS4700 Express.
6. Connect the OUT port (ꢀ2ꢁ) on the right ESM in the second EXP100 (ꢀ4ꢁ) to
port 2 of drive channel 2 on the DS4700 Express.
Figure 64 on page 83 shows the recommended cabling scheme for one DS4700
Express Storage Subsystem and four EXP100s behind both ports of a dual-ported
drive channel.
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DS4700
1
1
2
2
1
1
2
2
4
3
5
6
ds470053
Figure 64. One DS4700 Express and four EXP100 storage expansion enclosures behind a
pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the first EXP100 (ꢀ3ꢁ) to the IN
port (ꢀ1ꢁ) on the left ESM in the third EXP100 (ꢀ5ꢁ).
2. Connect the IN port (ꢀ1ꢁ) on the right ESM in the third EXP100 (ꢀ5ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the first EXP100 (ꢀ3ꢁ).
3. Connect the IN port (ꢀ1ꢁ) on the left ESM in the first EXP100 (ꢀ3ꢁ) to port 2 of
drive channel 1 on the DS4700 Express.
4. Connect port 1 of drive channel 2 on the DS4700 Express to the OUT port (ꢀ2ꢁ)
on the right ESM in the third EXP100 (ꢀ5ꢁ).
5. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the second EXP100 (ꢀ4ꢁ) to the
IN port (ꢀ1ꢁ) on the left ESM in the fourth EXP100 (ꢀ6ꢁ).
6. Connect the IN port (ꢀ1ꢁ) on the right ESM in the fourth EXP100 (ꢀ6ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the second EXP100 (ꢀ4ꢁ).
7. Connect the IN port (ꢀ1ꢁ) on the left ESM in the second EXP100 (ꢀ4ꢁ) to port 1
of drive channel 1 on the DS4700 Express.
8. Connect port 2 of drive channel 2 on the DS4700 Express to the OUT port (ꢀ2ꢁ)
on the right ESM in the fourth EXP100 (ꢀ6ꢁ).
Figure 65 on page 84 shows the recommended cabling scheme for one DS4700
Express Storage Subsystem and a maximum of six EXP100s behind both ports of a
dual-ported drive channel.
Chapter 3. Cabling the storage subsystem 83
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DS4700
1
1
1
2
2
2
1
1
1
2
2
2
4
3
5
6
7
8
ds470054
Figure 65. One DS4700 Express and a maximum of six EXP100 storage expansion
enclosures behind a pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the first EXP100 (ꢀ3ꢁ) to the IN
port (ꢀ1ꢁ) on the left ESM in the third EXP100 (ꢀ5ꢁ).
2. Connect the IN port (ꢀ1ꢁ) on the right ESM in the third EXP100 (ꢀ5ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the first EXP100 (ꢀ3ꢁ).
3. Connect the IN port (ꢀ1ꢁ) on the left ESM in the first EXP100 (ꢀ3ꢁ) to port 2 of
drive channel 1 on the DS4700 Express.
4. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the third EXP100 (ꢀ5ꢁ) to the
IN port (ꢀ1ꢁ) on the left ESM in the fifth EXP100 (ꢀ7ꢁ).
5. Connect the IN port (ꢀ1ꢁ) on the right ESM in the fifth EXP100 (ꢀ7ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the third EXP100 (ꢀ5ꢁ).
6. Connect port 1 of drive channel 2 on the DS4700 Express to the OUT port
(ꢀ2ꢁ) on the right ESM in the fifth EXP100 (ꢀ7ꢁ).
7. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the second EXP100 (ꢀ4ꢁ) to the
IN port (ꢀ1ꢁ) on the left ESM in the fourth EXP100 (ꢀ6ꢁ).
8. Connect the IN port (ꢀ1ꢁ) on the right ESM in the fourth EXP100 (ꢀ6ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the second EXP100 (ꢀ4ꢁ).
9. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the fourth EXP100 (ꢀ6ꢁ) to the
IN port (ꢀ1ꢁ) on the left ESM in the sixth EXP100 (ꢀ8ꢁ).
10. Connect the IN port (ꢀ1ꢁ) on the right ESM in the sixth EXP100 (ꢀ8ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the fourth EXP100 (ꢀ6ꢁ).
11. Connect the IN port (ꢀ1ꢁ) on the left ESM in the second EXP100 (ꢀ4ꢁ) to port
1 of drive channel 1 on the DS4700 Express.
12. Connect port 2 of drive channel 2 on the DS4700 Express to the OUT port
(ꢀ2ꢁ) on the right ESM in the sixth EXP100 (ꢀ8ꢁ).
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One DS4700 Express and one EXP710 storage expansion
enclosure
Figure 66 shows the recommended cabling scheme for one DS4700 Express
Storage Subsystem and one EXP710 storage expansion enclosure.
DS4700
1
2
EXP100
ds470034
Figure 66. One DS4700 Express and one EXP710 storage expansion enclosure —
Recommended cabling
Perform the following steps to create the recommended cabling scheme as shown
in Figure 66:
1. Connect either port 2 or port 1 of the dual-ported drive channel 1 in controller A
of the DS4700 Express to the IN port (ꢀ1ꢁ) on the left ESM of the EXP710.
2. Connect either port 1 or port 2 of the dual-ported drive channel 2 in controller B
of the DS4700 Express to the OUT port (ꢀ2ꢁ) on the right ESM of the EXP710.
One DS4700 Express and two EXP710 storage expansion
enclosures
Figure 67 shows the recommended cabling scheme for one DS4700 Express
Storage Subsystem and two EXP710 storage expansion enclosures behind both
ports of a dual-ported drive channel.
DS4700
1
2
1
2
3
4
EXP100
EXP100
ds470037
Figure 67. One DS4700 Express and two EXP710 storage expansion enclosures behind a
pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect port 2 of drive channel 1 on the DS4700 Express to the IN port (ꢀ1ꢁ)
on the left ESM on the first EXP710 (ꢀ3ꢁ).
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2. Connect the OUT port (ꢀ2ꢁ) on the right ESM in the first EXP710 (ꢀ3ꢁ) to port 1
of drive channel 1 on the DS4700 Express.
3. Connect port 1 of drive channel 1 on the DS4700 Express to the IN port (ꢀ1ꢁ)
on the left ESM in the second EXP710 (ꢀ4ꢁ).
4. Connect the OUT port (ꢀ2ꢁ) on the right ESM in the second EXP710 (ꢀ4ꢁ) to
port 2 of drive channel 2 on the DS4700 Express.
One DS4700 Express and three or more EXP710 storage
expansion enclosures
To connect three or more storage expansion enclosures to a DS4700 Express
Storage Subsystem, alternately connect a storage expansion enclosure to one of
the drive ports of the dual-ported drive channel then connect to the other port until
recommended cabling scheme for one DS4700 Express Storage Subsystem and
three EXP710 storage expansion enclosures behind both ports of a dual-ported
drive channel.
DS4700
1
1
2
2
1
2
4
3
5
ds470052
Figure 68. One DS4700 Express and three EXP710 storage expansion enclosures behind a
pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the first EXP710 (ꢀ3ꢁ) to the IN
port (ꢀ1ꢁ) on the left ESM in the third EXP710 (ꢀ5ꢁ).
2. Connect the IN port (ꢀ1ꢁ) on the right ESM in the third EXP710 (ꢀ5ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the first EXP710 (ꢀ3ꢁ).
3. Connect the IN port (ꢀ1ꢁ) on the left ESM in the first EXP710 (ꢀ3ꢁ) to port 2 of
drive channel 1 on the DS4700 Express.
4. Connect port 1 of drive channel 2 on the DS4700 Express to the OUT port (ꢀ2ꢁ)
on the right ESM in the third EXP710 (ꢀ5ꢁ).
5. Connect the IN port (ꢀ1ꢁ) on the left ESM in the second EXP710 (ꢀ4ꢁ) to port 1
of drive channel 1 on the DS4700 Express.
6. Connect the OUT port (ꢀ2ꢁ) on the right ESM in the second EXP710 (ꢀ4ꢁ) to
port 2 of drive channel 2 on the DS4700 Express.
Figure 69 on page 87 shows the recommended cabling scheme for one DS4700
Express Storage Subsystem and four EXP710 storage expansion enclosures
behind both ports of a dual-ported drive channel.
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DS4700
1
1
2
2
1
1
2
2
4
3
5
6
ds470053
Figure 69. One DS4700 Express and four EXP710 storage expansion enclosures behind a
pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the first EXP710 (ꢀ3ꢁ) to the IN
port (ꢀ1ꢁ) on the left ESM in the third EXP710 (ꢀ5ꢁ).
2. Connect the IN port (ꢀ1ꢁ) on the right ESM in the third EXP710 (ꢀ5ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the first EXP710 (ꢀ3ꢁ).
3. Connect the IN port (ꢀ1ꢁ) on the left ESM in the first EXP710 (ꢀ3ꢁ) to port 2 of
drive channel 1 on the DS4700 Express.
4. Connect port 1 of drive channel 2 on the DS4700 Express to the OUT port (ꢀ2ꢁ)
on the right ESM in the third EXP710 (ꢀ5ꢁ).
5. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the second EXP710 (ꢀ4ꢁ) to the
IN port (ꢀ1ꢁ) on the left ESM in the fourth EXP710 (ꢀ6ꢁ).
6. Connect the IN port (ꢀ1ꢁ) on the right ESM in the fourth EXP710 (ꢀ6ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the second EXP710 (ꢀ4ꢁ).
7. Connect the IN port (ꢀ1ꢁ) on the left ESM in the second EXP710 (ꢀ4ꢁ) to port 1
of drive channel 1 on the DS4700 Express.
8. Connect port 2 of drive channel 2 on the DS4700 Express to the OUT port (ꢀ2ꢁ)
on the right ESM in the fourth EXP710 (ꢀ6ꢁ).
Figure 70 on page 88 shows the recommended cabling scheme for one DS4700
Express Storage Subsystem and a maximum of six EXP710 storage expansion
enclosures behind both ports of a dual-ported drive channel.
Chapter 3. Cabling the storage subsystem 87
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DS4700
1
1
1
2
2
2
1
1
1
2
2
2
4
3
5
6
7
8
ds470054
Figure 70. One DS4700 Express and a maximum of six EXP710 storage expansion
enclosures behind a pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the first EXP710 (ꢀ3ꢁ) to the IN
port (ꢀ1ꢁ) on the left ESM in the third EXP710 (ꢀ5ꢁ).
2. Connect the IN port (ꢀ1ꢁ) on the right ESM in the third EXP710 (ꢀ5ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the first EXP710 (ꢀ3ꢁ).
3. Connect the IN port (ꢀ1ꢁ) on the left ESM in the first EXP710 (ꢀ3ꢁ) to port 2 of
drive channel 1 on the DS4700 Express.
4. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the third EXP710 (ꢀ5ꢁ) to the
IN port (ꢀ1ꢁ) on the left ESM in the fifth EXP710 (ꢀ7ꢁ).
5. Connect the IN port (ꢀ1ꢁ) on the right ESM in the fifth EXP710 (ꢀ7ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the third EXP710 (ꢀ5ꢁ).
6. Connect port 1 of drive channel 2 on the DS4700 Express to the OUT port
(ꢀ2ꢁ) on the right ESM in the fifth EXP710 (ꢀ7ꢁ).
7. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the second EXP710 (ꢀ4ꢁ) to the
IN port (ꢀ1ꢁ) on the left ESM in the fourth EXP710 (ꢀ6ꢁ).
8. Connect the IN port (ꢀ1ꢁ) on the right ESM in the fourth EXP710 (ꢀ6ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the second EXP710 (ꢀ4ꢁ).
9. Connect the OUT port (ꢀ2ꢁ) on the left ESM in the fourth EXP710 (ꢀ6ꢁ) to the
IN port (ꢀ1ꢁ) on the left ESM in the sixth EXP710 (ꢀ8ꢁ).
10. Connect the IN port (ꢀ1ꢁ) on the right ESM in the sixth EXP710 (ꢀ8ꢁ) to the
OUT port (ꢀ2ꢁ) on the right ESM in the fourth EXP710 (ꢀ6ꢁ).
11. Connect the IN port (ꢀ1ꢁ) on the left ESM in the second EXP710 (ꢀ4ꢁ) to port
1 of drive channel 1 on the DS4700 Express.
12. Connect port 2 of drive channel 2 on the DS4700 Express to the OUT port
(ꢀ2ꢁ) on the right ESM in the sixth EXP710 (ꢀ8ꢁ).
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One DS4700 Express and one EXP810 storage expansion
enclosure
Figure 71 shows the recommended cabling scheme for one DS4700 Express
Storage Subsystem and one EXP810 storage expansion enclosure.
DS4000
Storage Subsystem
1
Storage
Expansion Enclosure
1
ds470033
Figure 71. One DS4700 Express and one EXP810 storage expansion enclosure —
Recommended cabling
Perform the following steps to create the recommended cabling scheme shown in
1. Connect either port 2 or port 1 of the dual-ported drive channel 1 in controller A
on the DS4700 Express to port 1B (ꢀ1ꢁ) on the left ESM of the EXP810.
2. Connect either port 1 or port 2 of the dual-ported drive channel 2 in controller B
on the DS4700 Express to port 1B (ꢀ1ꢁ) on the right ESM of the EXP810.
One DS4700 Express and two EXP810 storage expansion
enclosures
Figure 72 on page 90 shows the cabling scheme for one DS4700 Express Storage
Subsystem and two EXP810 storage expansion enclosures behind both ports of a
dual-ported drive channel.
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1
1
2
3
1
1
ds470038
Figure 72. One DS4700 Express and two EXP810 storage expansion enclosures behind a
pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect port 2 of drive channel 1 on the DS4700 Express to port 1B (ꢀ1ꢁ) on
the left ESM in the first EXP810 (ꢀ2ꢁ).
2. Connect port 1B (ꢀ1ꢁ) on the right ESM in the first EXP810 (ꢀ2ꢁ) to port 1 of
drive channel 2 on the DS4700 Express.
3. Connect port 1 of drive channel 1 on the DS4700 Express to port 1B (ꢀ1ꢁ) on
the left ESM in the second EXP810 (ꢀ3ꢁ).
4. Connect port 1B (ꢀ1ꢁ) on the right ESM in the second EXP810 (ꢀ3ꢁ) to port 2 of
drive channel 2 on the DS4700 Express.
One DS4700 Express and three or more EXP810 storage
expansion enclosures
To connect three or more storage expansion enclosures to a DS4700 Express
Storage Subsystem, alternately connect a storage expansion enclosure to one of
the drive ports of the dual-ported drive channel then connect to the other port until
the cabling scheme for one DS4700 Express Storage Subsystem and three
EXP810 storage expansion enclosures behind both ports of a dual-ported drive
channel.
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1
1
1
2
4
3
1
1
1
ds470055
Figure 73. One DS4700 Express and three EXP810 storage expansion enclosures behind a
pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect port 1A on the left ESM in the first EXP810 (ꢀ2ꢁ) to port 1B (ꢀ1ꢁ) on
the left ESM in the third EXP810 (ꢀ4ꢁ).
2. Connect port 1A on the right ESM in the third EXP810 (ꢀ4ꢁ) to port 1B (ꢀ1ꢁ) on
the right ESM in the first EXP810 (ꢀ2ꢁ).
3. Connect port 1B (ꢀ1ꢁ) on the left ESM in the first EXP810 (ꢀ2ꢁ) to port 2 of
drive channel 1 on the DS4700 Express.
4. Connect port 1 of drive channel 2 on the DS4700 Express to port 1B (ꢀ1ꢁ) on
the right ESM in the third EXP810 (ꢀ4ꢁ).
5. Connect port 1B (ꢀ1ꢁ) on the left ESM in the second EXP810 (ꢀ3ꢁ) to port 1 of
drive channel 1 on the DS4700 Express.
6. Connect port 1B (ꢀ1ꢁ) on the right ESM in the second EXP810 (ꢀ3ꢁ) to port 2 of
drive channel 2 on the DS4700 Express.
Figure 74 on page 92 shows the recommended cabling scheme for one DS4700
Express Storage Subsystem and four EXP810 storage expansion enclosures
behind both ports of a dual-ported drive channel.
Chapter 3. Cabling the storage subsystem 91
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1
1
1
1
2
4
3
1
1
5
1
1
ds470056
Figure 74. One DS4700 Express and four EXP810 storage expansion enclosures behind a
pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect port 1A on the left ESM in the first EXP810 (ꢀ2ꢁ) to port 1B (ꢀ1ꢁ) on
the left ESM in the third EXP810 (ꢀ4ꢁ).
2. Connect port 1A on the right ESM in the third EXP810 (ꢀ4ꢁ) to port 1B (ꢀ1ꢁ) on
the right ESM in the first EXP810 (ꢀ2ꢁ).
3. Connect port 1B (ꢀ1ꢁ) on the left ESM in the first EXP810 (ꢀ2ꢁ) to port 2 of
drive channel 1 on the DS4700 Express.
4. Connect port 1 of drive channel 2 on the DS4700 Express to port 1B (ꢀ1ꢁ) on
the right ESM in the third EXP810 (ꢀ4ꢁ).
5. Connect port 1A on the left ESM in the second EXP810 (ꢀ3ꢁ) to port 1B (ꢀ1ꢁ)
on the left ESM in the fourth EXP810 (ꢀ5ꢁ).
6. Connect port 1A on the right ESM in the fourth EXP810 (ꢀ5ꢁ) to port 1B (ꢀ1ꢁ)
on the right ESM in the second EXP810 (ꢀ3ꢁ).
7. Connect port 1B (ꢀ1ꢁ) on the left ESM in the second EXP810 (ꢀ3ꢁ) to port 1 of
drive channel 1 on the DS4700 Express.
8. Connect port 2 of drive channel 2 on the DS4700 Express to port 1B (ꢀ1ꢁ) on
the right ESM in the fourth EXP810 (ꢀ5ꢁ).
Figure 75 on page 93 shows the recommended cabling scheme for one DS4700
Express Storage Subsystem and a maximum of six EXP810 storage expansion
enclosures behind both ports of a dual-ported drive channel.
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1
1
1
1
1
1
2
4
3
1
1
5
7
1
1
6
1
1
ds470057
Figure 75. One DS4700 Express and a maximum of six EXP810 storage expansion
enclosures behind a pair of DS4700 drive ports
Perform the following steps to create the recommended cabling scheme shown in
1. Connect port 1A on the left ESM in the first EXP810 (ꢀ2ꢁ) to port 1B (ꢀ1ꢁ) on
the left ESM in the third EXP810 (ꢀ4ꢁ).
2. Connect port 1A on the right ESM in the third EXP810 (ꢀ4ꢁ) to port 1B (ꢀ1ꢁ) on
the right ESM in the first EXP810 (ꢀ2ꢁ).
3. Connect port 1B (ꢀ1ꢁ) on the left ESM in the first EXP810 (ꢀ2ꢁ) to port 2 of
drive channel 1 on the DS4700 Express.
4. Connect port 1A on the left ESM in the third EXP810 (ꢀ4ꢁ) to port 1B (ꢀ1ꢁ) on
the left ESM in the fifth EXP810 (ꢀ6ꢁ).
5. Connect port 1A on the right ESM in the fifth EXP810 (ꢀ6ꢁ) to port 1B (ꢀ1ꢁ) on
the right ESM in the third EXP810 (ꢀ4ꢁ).
6. Connect port 1 of drive channel 2 on the DS4700 Express to port 1B (ꢀ1ꢁ) on
the right ESM in the fifth EXP810 (ꢀ6ꢁ).
7. Connect port 1A on the left ESM in the second EXP810 (ꢀ3ꢁ) to port 1B (ꢀ1ꢁ)
on the left ESM in the fourth EXP810 (ꢀ5ꢁ).
8. Connect port 1A on the right ESM in the fourth EXP810 (ꢀ5ꢁ) to port 1B on the
right ESM in the second EXP810 (ꢀ3ꢁ).
9. Connect port 1B (ꢀ1ꢁ) on the left ESM in the second EXP810 (ꢀ3ꢁ) to port 1 of
drive channel 1 on the DS4700 Express.
10. Connect port 1A on the left ESM in the fourth EXP810 (ꢀ5ꢁ) to port 1B (ꢀ1ꢁ) on
the left ESM in the sixth EXP810 (ꢀ7ꢁ).
11. Connect port 1A on the right ESM in the sixth EXP810 (ꢀ7ꢁ) to port 1B on the
right ESM in the fourth EXP810 (ꢀ5ꢁ).
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12. Connect port 2 of drive channel 2 on the DS4700 Express to port 1B (ꢀ1ꢁ) on
the right ESM in the sixth EXP810 (ꢀ7ꢁ).
One DS4700 Express and two or more storage expansion
enclosures in a mixed configuration
When you cable the DS4700 Express Storage Subsystem to storage expansion
enclosures that are in a mixed configuration, it is recommended that you cable the
same type of enclosures together. If it is not possible to cable each group of
enclosures by model type (EXP100s, EXP710s, and EXP810s) in a separate
redundant drive loop pair or behind each port of the dual-ported redundant drive
channel pair, group them so that EXP810s are between EXP100s and EXP710s.
In addition, when an EXP100 is the first storage expansion enclosure cabled
directly to the storage subsystem's controller drive port, follow these rules:
v Cable from the storage subsystem controller drive port to the OUT port on the
left ESM (ESM A) of the EXP100.
Note: This is a change from previous cabling recommendations where you
cabled from the controller drive port to the IN port on the left ESM (ESM
A) of the EXP100.
v If an EXP100 follows the initial EXP100, cable from the IN port on the left ESM
(ESM A) of the first EXP100 to the OUT port on the left ESM of the next
EXP100. Continue this cabling pattern until you encounter an EXP710 or
EXP810, then cable from the IN port on the left ESM (ESM A) of the EXP100 to
the IN port of the EXP710 or EXP810.
v If an EXP710 or EXP810 follows the initial EXP100, cable from the IN port on the
left ESM (ESM A) of the EXP100 to the IN port of the EXP710 or EXP810. To
cable to the next storage expansion enclosure in the chain, cable from the OUT
port of the left ESM of the EXP710 or EXP810 to the IN port of the next storage
expansion enclosure.
v Continue the left ESM (ESM A) cabling pattern by cabling from the OUT port to
the IN port on subsequent storage expansion enclosures until you complete the
chain.
Figure 76 on page 95 shows an acceptable EXP710, EXP810 and EXP100 intermix
configuration in a DS4700 Express environment. The cabling is acceptable because
it follows the cabling recommendations.
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DS4000 Storage Subsystem
DS4000 Storage Subsystem
1
1
4
5
5
4
4
5
ESM A
ESM B
ESM A
6
7
ESM B
EXP100
EXP810
7
7
6
Out
2
3
4
ESM A
5
ESM B
ESM A
6
7
ESM B
EXP100
EXP810
6
4
ESM A
6
7
7
4
5
5
5
ESM A
ESM B
ESM B
EXP810
7
6
6
EXP100
3
2
ESM A
6
4
4
5
ESM B
ESM A
ESM B
EXP810
7
EXP100
exp100810a
Figure 76. Acceptable EXP710, EXP810 and EXP100 intermix configuration in a DS4700
Express Storage Subsystem environment
Number
Description
1
2
3
4
5
6
7
DS4700 Express Storage Subsystem
EXP100
EXP810
IN port
OUT port
Port 1B
Port 1A
Figure 77 on page 96 shows an unacceptable EXP710, EXP810, and EXP100
intermix configuration in a DS4700 Express Storage Subsystem environment. The
cabling is unacceptable because storage subsystem controller is cabled to the IN
port on the left ESM of the first EXP100.
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DS4000 Storage Subsystem
1
4
5
4
4
5
ESM A
ESM B
EXP100
2
4
ESM A
5
5
ESM B
EXP100
ESM A
6
7
7
ESM B
EXP810
7
6
6
3
ESM A
6
ESM B
EXP810
7
exp100810u
Figure 77. Unacceptable EXP710, EXP810 and EXP100 intermix configuration in a DS4700
Express Storage Subsystem environment
Number
Description
1
2
3
4
5
6
7
DS4700 Express Storage Subsystem
EXP100
EXP810
IN port
OUT port
Port 1B
Port 1A
Figure 78 on page 97 shows cabling variations when intermixing EXP100, EXP710,
and EXP810 storage expansion enclosures behind a DS4700 Express Storage
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Subsystem.
1
DS4700 Express
EXP710
EXP710
EXP100
EXP100
EXP100
EXP100
EXP100
2
2
2
4
2
EXP810
3
EXP100
EXP100
EXP710
EXP710
EXP810
EXP710
EXP810
EXP810
2
3
4
4
ds470102
Figure 78. Cabling variations when intermixing EXP100, EXP710, and EXP810 storage expansion enclosures behind a
DS4700 Express Storage Subsystem
Number
Description
1
2
3
4
DS4700 Express Storage Subsystem
EXP100
EXP810
EXP710
Storage expansion enclosure settings
This section provides information about storage expansion enclosure settings. For
additional detail, refer to the Installation, User's, and Maintenance Guide for your
storage expansion enclosure.
Fibre channel loop and ID settings
When you install an E-DDM in the storage expansion enclosure, the E-DDM tray
plugs into a printed circuit board called the midplane. The midplane sets the fibre
channel loop ID automatically, based on the enclosure ID switch setting and the
physical location (bay) of the E-DDM.
DS4000 storage expansion enclosure ID settings
Some DS4000 storage expansion enclosures, such as the EXP710 and EXP100,
have an enclosure ID switch that is used to identify the DS4000 storage expansion
enclosure on a fibre channel loop. The enclosure ID switch is located on the back
of the unit. Other DS4000 storage expansion enclosures, such as the EXP810, do
not have an enclosure ID switch because the controller automatically sets the
enclosure ID number.
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If required, use a small screwdriver or the tip of a pen to push the small buttons
above and below each enclosure ID digit to change the enclosure ID setting. Press
the button located above the digit to lower the digit by one. Press the button located
below the digit to raise the digit by one.
Note: Some DS4000 storage expansion enclosures ship with a panel installed over
the enclosure ID switch to prevent the enclosure ID from being changed
accidentally. If your DS4000 storage expansion enclosure has a protective
panel over the ID switch, use a pencil or a small screwdriver to change the
enclosure ID.
Each storage expansion enclosure in a DS4000 Storage Subsystem drive loop must
have a unique enclosure ID. DS4000 controllers use a combination of the enclosure
ID and the number of the physical slot that a hard drive occupies to create a unique
fibre channel loop address or arbitrated loop physical address (AL_PA) for each
drive in a fibre channel drive loop. The enclosure ID consists of two digits, a tens
digit (x10) and ones digit (x1).
Attention: When connecting storage expansion enclosures, you must use the
tens digit (x10) enclosure ID setting to distinguish different redundant drive channel
pairs and use the ones digit (x1) enclosure ID setting to distinguish storage
expansion enclosures IDs within a redundant drive channel pair. For example, in a
DS4700 Express configuration with six EXP710 or EXP100 storage expansion
enclosures connected in a redundant drive channel/loop pair, the recommended
expansion enclosures automatically set their enclosure IDs to be unique in a drive
channel pair.
Table 30. Recommended enclosure ID settings scheme when connecting a DS4700 to
EXP710s or EXP100s
Enclosure ID of storage expansion enclosures in a
redundant drive channel
Enclosure 1
Enclosure 2
Enclosure 3
Enclosure 4
Enclosure 5
Enclosure 6
11
12
13
14
15
16
The DS4700 Express normally ships with an enclosure ID outside the range of
00–77. However, if your DS4700 Express enclosure ID was set to a value within the
range of 00–77, it may be in conflict with the enclosure ID of one of the drive
expansion enclosures that you are trying to attach to the DS4700 Express. If this is
the case, the amber ID Conflict LED on the storage expansion enclosure will light
after you power on the storage subsystem.
Give each storage expansion enclosure in a redundant drive channel pair a unique
ones digit (x1) ID. This setting will enforce hard AL_PAs (unchangeable between
fibre channel Loop Initializations [LIPs]) for the drives and facilitate drive loop
problem troubleshooting in the event of an error. If the one's digits are not unique,
two or more devices will have the same hard AL_PA. In such a case, the DS4700
Express controller will use soft AL_PAs for the devices that have identical hard
AL_PAs.
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The problem with soft AL_PAs addressing is that addresses may change between
LIPs. This possibility increases the difficulty of troubleshooting drive channel
problems, since one cannot easily ascertain whether the same device with a
different address or different device may be causing a problem. IBM recommends
always setting the enclosure IDs in a given drive channel/loop pair to enforce hard
AL_PAs addressing.
Intermixing storage expansion enclosures in the same drive loop
In a DS4700 Express configuration, you can intermix EXP810s, EXP710s, and
EXP100s. When intermixing EXP810s with EXP710s or EXP100s in the same drive
loop, the Link Rate switch for all storage expansion enclosures in the intermixed
drive loop must be 2 Gbps because the EXP710 and EXP100 only operate at 2
Gbps.
There are maximum limits to the number of fibre channel hard drives that you can
configure in redundant drive channel pairs. The maximum number of drives dictates
a fixed number of supported EXP710 or EXP100 and EXP810 drive enclosure
combinations.
you can combine for use in a single redundant drive channel/loop pair in a DS4700
combinations per redundant drive channel/loop pair in a DS4700 Express
configuration. The table assumes that a DS4700 Express storage subsystem is
generally capable of addressing the maximum of 112 fibre channel hard drives for
each redundant drive channel/loop pair.
Table 31. Possible combinations of 14-drive and 16-drive storage expansion enclosures per
redundant drive/channel loop pair in a DS4700 Express configuration
Total number
Number of Total
EXP710/ number of number of
number of EXP100s
drives in (14
Total
of drives in a
mixed
EXP710s and
EXP810s drive
loop
Number of Total
EXP810s
(16
drives in
EXP710/
drives in
the DS4700
Express
drives/unit) EXP810s
drives/unit) EXP100s
0
1
2
3
4
5
6
0
7
5
4
3
2
1
0
98
70
56
42
28
14
0
16
16
16
16
16
16
16
=
=
=
=
=
=
=
114
102
104
106
108
110
112
16
32
48
64
80
96
For more information about intermixing storage expansion enclosures and the most
current information on the DS4000 Fibre Channel and Serial ATA (FC/SATA)
Enclosure Intermix premium feature, see the following Web site:
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Connecting secondary interface cables
This section is applicable to (direct) out-of-band management configurations only. If
your configuration uses host-agent (in-band) management, skip this section.
Use the Ethernet interface ports on the back of the storage subsystem to connect
the controllers for direct management of the storage subsystems (see “Direct
Important:
1. The serial interface ports are intended to be used by service technicians to
perform diagnostic operations on the storage subsystem. Incorrect use of the
serial port can result in loss of data access and, in some cases, in loss of data.
Do not make connections to the serial port unless you do so under the direct
supervision and guidance of IBM support personnel. The serial port connection
requires a special PS2 DIN to DB9 male converter. (IBM Service and support
FRU P/N.)
2. To minimize security risks, do not connect the DS4700 Express in a public LAN
or public subnet. Use a local private network for the DS4700 Express and the
management station Ethernet ports.
3. To ensure proper EMI shielding, always use quality braided and shielded serial
cables.
Connect a pair of Ethernet cables from the storage-management station to the
Ethernet ports for controller A (located on the top) and controller B (located on the
ports on the DS4700 Express Storage Subsystem model 70, and Figure 80 on page
101 shows the location of the ports on the DS4700 Express Storage Subsystem
model 72. Only one Ethernet port connection from each controller is required to
establish a direct (out-of-band) management connection to the DS4700 Express
Storage Subsystem.
Note: The alignment of the Ethernet and serial ports on controller A are opposite
those of controller B. Before inserting an Ethernet or serial cable, verify that
the cable connection is rotated correctly to match the alignment of the port
on the RAID controller. Do not force-fit.
1
2
2
1
Figure 79. Ethernet and serial port locations on DS4700 Express model 70
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Table 32. DS4700 Express Storage Subsystem (Model 72) location of host ports on
controllers
Number
Description
1
Ethernet ports
Note: Ethernet ports on the left controller are
labeled 2 and 1. On the right controller, they are
labeled 1 and 2.
2
Serial port
2
1
2
1
Figure 80. Ethernet and serial port locations on DS4700 Express model 72
Table 33. DS4700 Express Storage Subsystem (Model 72) location of host ports on
controllers
Number
Description
1
Ethernet ports
Note: Ethernet ports on the left controller are
labeled 2 and 1. On the right controller, they are
labeled 1 and 2.
2
Serial port
Configuring the storage subsystem
You must configure the storage subsystem configuration after you install the storage
subsystem in a rack cabinet. Use the information in the following sections to
configure your storage subsystem configuration.
Storage subsystem management methods
Before you configure the storage subsystem, determine which method of storage
subsystem management you want to use. You can manage the storage subsystems
in either of two ways: host-agent (in-band) management or direct (out-of-band)
management.
For more information on setting up in-band or out-of-band management
connections, refer to the DS4000 Storage Manager Installation and Host Support
Guide for the operating system of the host computer that will be used to manage
the storage subsystem.
Important: If the operating system of the host server that the storage subsystem
logical drives are mapped to is not Microsoft Windows 2000 or Server
2003, then you have to make a direct (out-of-band) management
connection to the storage subsystem to set the correct host type first.
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Then, the server will be able to recognize the storage subsystem
correctly for host-agent (in-band) management.
Host-agent (in-band) management method
This method requires host-agent software that you install on the host server. The
host-agent software allows the DS4000 Storage Manager client program to manage
the DS4000 Storage Subsystem using the same fibre channel connections between
the host server and the storage subsystem. You must install at least one
management station and a software agent host. The management station can be
the host or a workstation on the Ethernet network. A management station will have
method.
Figure 81. Host-agent (in-band) managed storage subsystems
Table 34. Description of Figure 61
Number
ꢀ1ꢁ
Description
Two storage subsystems
Fibre channel I/O path
Host server
ꢀ2ꢁ
ꢀ3ꢁ
ꢀ4ꢁ
Ethernet network
Management station
ꢀ5ꢁ
Direct (out-of-band) management method
This method uses Ethernet connections from a management station to each
controller. You must install at least one management station. The management
station can be the host or a workstation on the Ethernet network. A management
station will have the client software installed. Attach Ethernet cables to each
management station (one pair per storage subsystem). You will connect the cables
to each storage subsystem controller later when you install the storage subsystem.
Figure 82 on page 104 shows the direct (out-of-band) management method.
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You can either use the default controller Ethernet IP addresses for out-of-band
connection or change the default controller Ethernet IP addresses by using
Dynamic Host Configuration Protocol (DHCP) or Storage Manager client. Refer to
the DS4000 Storage Manager Installation, User's and Maintenance Guide for the
appropriate operating system for more information on setting the management
connections and installing the DS4000 storage subsystem management software.
For a listing of default IP addresses, see “Connectors, switch, and enclosure ID” on
Note: Do not connect the storage subsystem Ethernet ports to a public network or
public subnet. It is strongly recommended that you create a private network
between the storage subsystem and the management station.
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Table 35. Description of Figure 62
Number
ꢀ1ꢁ
Description
Two storage subsystems
Fibre channel I/O path
Host server
ꢀ2ꢁ
ꢀ3ꢁ
ꢀ4ꢁ
Ethernet network
Management station
ꢀ5ꢁ
Figure 82. Direct (out-of-band) managed storage subsystems
Connecting hosts to the DS4700 Express
The DS4700 Express supports redundant direct attached connections to up to four
hosts (models 72A and 72H). To ensure full protection against the loss of any one
fibre channel path from the host servers to the DS4700 Express Storage
Subsystem, always use redundant host connections by connecting each host to the
appropriate single-ported host channels on both RAID controllers A and B. Using
the fibre channel switches, up to 512 hosts can be redundantly attached to the
DS4700 Express Storage Subsystem in a fibre channel SAN fabric.
To connect a host adapter to the DS4700 Express RAID controllers, perform the
following steps:
1. Install SFP modules in host ports on RAID controllers A and B.
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Note: The alignment of the single-ported host channels on controller A are
opposite those of controller B. Before inserting an SFP module into a
host port, verify that the SFP module is rotated correctly to match the
alignment of the host port on the RAID controller. Do not force-fit.
2. Connect the fibre channel cables from the SFP modules in the DS4700 Express
RAID controller host ports to either the SFP modules in the fibre channel switch
location on the RAID controllers on models 70 and 72 of the DS4700 Express
Storage Subsystem where the host-system cables connect.
3
1
2
3
Figure 83. Location of host cables on RAID controllers on model 70 of the DS4700 Express
Table 36. DS4700 Express Storage Subsystem (Model 70) location of host ports on
controllers
Number
Description
Controller A
Controller B
Host Ports
1
2
3
3
1
2
3
Figure 84. Location of host cables on RAID controllers on model 72 of the DS4700 Express
Table 37. DS4700 Express Storage Subsystem (Model 72) location of host ports on
controllers
Number
Description
Controller A
Controller B
Host Ports
1
2
3
connection. You can create a maximum of two redundant host connections for
the DS4700 Express Storage Subsystem model 70, as shown in Figure 85 on
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page 106, or a maximum of four redundant host connections for the DS4700
Express Storage Subsystem model 72, as shown in Figure 86 on page 107.
adapter in the DS4700 Express Storage Subsystem. You can also
connect to fibre channel switch ports (not shown).
Host 1, Host Adapter 1 and 2
2 1
1 2
Host 2, Host Adapter 1 and 2
Figure 85. Cabling diagram for two redundant host connections
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Host 1, Host Adapter 1 and 2
Host 4, Host Adapter 1 and 2
4 3 2 1
1 2 3 4
Host 3, Host Adapter 1 and 2
Host 2, Host Adapter 1 and 2
Figure 86. Cabling diagram for four redundant host connections
For examples of redundant, partially-redundant, and non-redundant host and drive
loop configurations, see “Fibre channel host loop configurations.”
Fibre channel connections
The storage subsystem fibre channel connection consists of up to four host
fibre-channel loops and a redundant drive fibre-channel loop. The host fibre-channel
loops provide the fibre path for host attachment. They can consist of fibre-channel
cables, SFPs, host bus adapters, fibre-channel switches, and RAID controllers. The
redundant drive fibre-channel loop provides the fibre path from the DS4700 Express
Storage Subsystem to the hard disk drives (HDDs) in the storage expansion
enclosures. The redundant drive fibre-channel loop consists of the DS4700 Express
Storage Subsystem, the storage expansion enclosures, fibre-channel cables, and
SFPs.
The DS4700 Express supports redundant drive channel loop configurations. You
can build a redundant drive channel loop by connecting one or more storage
expansion enclosures to the redundant RAID controllers. Then, use dual fiber-optic
cables to connect one storage expansion enclosure to another in a daisy-chain. For
more information, see “Connecting storage expansion enclosures to the DS4700
Fibre channel host loop configurations
You must determine how the host systems will connect to the storage subsystem.
You can connect up to four host systems directly to the storage subsystem, or you
can connect more than two hosts to the fibre channel storage subsystem through
switches. The illustrations in the following sections show common host system
configurations.
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Note: The minimum DS4700 Express configuration is two partitions. The maximum
is 128 partitions. Configuration upgrades are available as upgrade options.
Contact your IBM reseller or marketing representative for more information.
Redundant host and drive loops
This section provides examples of DS4700 Express host fibre channel
configurations.
DS4700 Express host configurations: This section provides the following
examples of DS4700 Express host fibre channel configurations:
v Redundant host and drive fibre channel loop configurations, as shown in
v Two storage subsystems in a dual SAN fabric configuration, as shown in
Notes:
1. These configurations have host and drive path failover protection and are
recommended for high availability.
2. The following illustrations do not accurately represent the controller locations or
port locations in the DS4700 Express. The illustrations are for illustration
purposes only.
Host system
with two host
adapters
Host system
with two host
adapters
Host system
with two host
adapters
DS4700
DS4700
Figure 87. Examples of redundant host direct attached fibre channel configurations
inter-switch link (ISL) to form a single SAN fabric.
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Host system
with two host
adapters
Host system
with two host
adapters
Switch
Switch
Interswitch link
DS4700
Figure 88. Example of a single SAN fabric configuration
link (ISL) to form a dual SAN fabric.
Host system
with two host
adapters
Host system
with two host
adapters
Note: Node level
redundancy with
cluster software.
Switch
Switch
DS4700
Figure 89. Example of a dual SAN fabric configuration
Each switch forms its own SAN fabric.
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Host system
with two host
adapters
Host system
with two host
adapters
Switch
Switch
DS4700
DS4700
Figure 90. Example of two storage subsystems in a dual SAN environment
Figure 91 shows an example of a two-cluster configuration.
Cluster 1
Cluster 2
Host system
with two host
adapters
Host system
with two host
adapters
Host system
with two host
adapters
Host system
with two host
adapters
Switch
Switch
Switch
Switch
DS4700
Figure 91. Example of a two-cluster configuration
Installing the storage subsystem configuration
Using the information gathered in the previous sections, install the host systems
and host adapters.
Notes:
1. See the documentation provided with your host adapters for installation
requirements and procedures.
2. Use the correct host adapter driver. For the latest supported host adapters and
drivers, go to the following Web site:
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Attach fiber-optic interface cables to each host adapter. You will connect the other
end of the cables to the controller later in the installation process. For more
information about handling fiber-optic cables, see “Handling fibre-optic cables” on
Cabling the ac power supply for ac models
Complete the following steps to connect the ac power supply cable:
1. Using the supplied strap, tie the power supply cord to the rail to provide strain
relief for the power cord.
2. Connect the power cable to the power supply.
3. Plug the supplied power cable into a properly grounded electrical outlet. For
maximum protection against power loss, connect each of the two power
supplies to a different power source.
startup of the storage subsystem.
Cabling the dc power supply for dc models
Statement 29:
CAUTION:
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment.
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment. If this
connection is made, all of the following conditions must be met:
v This equipment shall be connected directly to the dc supply system
earthing electrode conductor or to a bonding jumper from an earthing
terminal bar or bus to which the dc supply system earthing electrode
conductor is connected.
v This equipment shall be located in the same immediate area (such as,
adjacent cabinets) as any other equipment that has a connection between
the earthed conductor of the same dc supply circuit and the earthing
conductor, and also the point of earthing of the dc system. The dc system
shall not be earthed elsewhere.
v The dc supply source shall be located within the same premises as this
equipment.
v Switching or disconnecting devices shall not be in the earthed circuit
conductor between the dc source and the point of connection of the
earthing electrode conductor.
Statement 30:
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CAUTION:
To reduce the risk of electric shock or energy hazards:
v This equipment must be installed by trained service personnel in a
restricted-access location, as defined by the NEC and IEC 60950-1, First
Edition, The Standard for Safety of Information Technology Equipment.
v Connect the equipment to a reliably grounded safety extra low voltage
(SELV) source. An SELV source is a secondary circuit that is designed so
that normal and single fault conditions do not cause the voltages to exceed
a safe level (60 V direct current).
v The branch circuit overcurrent protection must be rated 20 A.
v Use 12 American Wire Gauge (AWG) or 2.5 mm2 copper conductor only, not
exceeding 4.5 meters in length.
v Incorporate a readily available approved and rated disconnect device in the
field wiring.
CAUTION:
This unit has more than one power source. To remove all power from the unit,
all dc MAINS must be disconnected.
CAUTION:
There is current to the power supply and fan units even though the power
supply switch is in the OFF position. Use a disconnect device to shut power
off before unplugging the dc power jumper cable from the dc power supply
connectors.
There are two ways to cable the dc power supply and fan units:
v Single-level redundant dc cabling
v Dual-level redundant dc cabling
Single-level redundant dc cabling
In a single-level redundant dc cabling scheme, the DS4700 Express NEBS models
are connected to the dc power source using the two dc power cords that are
shipped. Only one dc power connector in each of the dc power supply and fan units
is connected to a dc power source. The other dc power connector in each dc power
supply and fan unit is left open. The dc power connectors A1 (ꢀ5ꢁ) are connected to
the left dc power source (ꢀ1ꢁ) while dc power connectors B1 (ꢀ6ꢁ) are connected to
the right dc power source (ꢀ2ꢁ). This cabling scheme protects against any single
failure such as failed dc source, dc power supply, or dc cable. Figure 92 on page
113 illustrates single-level redundant cabling.
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1
2
3
6
5
6
5
4
4
6
5
ds470094
Figure 92. DC power supply and fan unit cabling scheme - single-level redundancy
Dual-level redundant dc cabling
In a dual-level redundancy dc cabling scheme, both dc power connectors in each of
the dc power supply and fan units are connected to a dc power source. You will
need two additional dc power cables (IBM Option P/N 42D3329) to cable in this
way. The dc power connectors A1 (ꢀ5ꢁ) are connected to the left dc power source
(ꢀ1ꢁ) and dc power connectors A2 (ꢀ7ꢁ) are connected to the right dc power source
(ꢀ2ꢁ). dc power connectors B1 (ꢀ6ꢁ) are connected to the right dc power source
(ꢀ2ꢁ) and dc power connectors B2 (ꢀ8ꢁ) are connected to the left dc power source
(ꢀ1ꢁ). For maximum protection, connect dc power connectors A2 and B2 to a
different set of dc power sources than dc power connectors A1 and B1 are
connected to.
This cabling scheme protects against certain combinations of dual failures in the dc
power supply connections such as a failed dc source and dc power supply and fan
unit. For example, if the left dc power source (ꢀ1ꢁ) and the right side dc power
supply and fan unit failed, the DS4700 Express Storage Subsystem remains
operational because the dc power is supplied from the right dc power source (ꢀ2ꢁ)
through the left dc power supply connector A2 (ꢀ7ꢁ).
Figure 93 on page 114 illustrates dual-level cabling.
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1
2
8
3
6
5
7
8
6
6
5
4
4
7
7
8
5
ds470093
Figure 93. DC power supply and fan unit cabling scheme - dual-level redundancy
Complete the following steps to connect the dc power supply cable:
1. Using the supplied strap, tie the power supply cord to the rail to provide strain
relief for the power cord.
power supply connector PIN positions.
1
2
3
Figure 94. DC power supply connector - PIN positions
Table 38. DC power supply connector - PIN descriptions
Number
Description
1
2
3
Pin 1: -48 V dc
Pin 2: POS RTN
Pin 3: GND
3. Connect the - 48V line of the dc power cable to an approved and rated
disconnect device. The disconnect device must be easily accessible from the
back of the DS4700 Express unit.
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4. Complete the wiring from the disconnect device to the terminal marked -48V of
the Reliably grounded safety extra low voltage (SELV) dc power source.
Connect the POS RTN and ground lines of the dc power cable to the terminals
marked POS RTN and GND on the dc power source, as shown in Figure 95.
For maximum protection against power loss, connect each of the two dc power
supplies to a different power source.
5
1
2
3
4
Figure 95. DC wiring from DS4700 Express to disconnect device and dc power source
Table 39. DC power source wiring descriptions
Number
Description
1
2
3
4
5
Pin 1: -48 V dc
Pin 2: POS RTN
Pin 3: GND
DC power source
Disconnect device
startup of the storage subsystem.
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Chapter 4. Operating the storage subsystem
This chapter describes operating procedures for the DS4700 Express.
Performing the DS4000 Health Check process
The DS4000 Health Check process is a sequence of suggested actions developed
by IBM to help users verify and maintain the optimal performance of their DS4000
storage configurations. The information that you collect in these steps also helps
provide IBM Service with important information needed for problem troubleshooting
during IBM Service calls.
Perform the following Health Check tasks after the initial configuration of your
DS4000 Storage Subsystem, and after all configuration sessions. It is also
recommended that you set a regular schedule of periodic Health Check evaluations
in order to keep your DS4000 code current and to preserve optimal data access
and performance.
1. Monitor the Recovery Guru in the Storage Manager client for any obvious
storage subsystem errors or problem conditions.
2. Gather and save the following DS4000 storage subsystem event logs for review
by IBM Service. These event logs should be gathered periodically for regular
Health Check monitoring regardless of the state of the Recovery Guru. (You can
collect all these logs at once and zip them into a single file by clicking
Advanced ꢀ Troubleshooting ꢀ Collect All Support Data in the DS4000
Storage Manager Subsystem Management window.)
v DS4000 storage subsystem management event log (MEL)
v Storage Subsystem Profile or DS4000 Profile
v Read-Link Status (RLS) data
In addition, you should also collect event logs for the host servers that have
mapped logical drives from the storage subsystem.
Attention: Save these event log files to a server disk that will remain
accessible in the event of a DS4000 storage configuration failure. Do not save
these event log files only to a LUN in the DS4000 Storage Subsystem.
3. Use the Storage Subsystem Profile or DS4000 Profile to verify that the following
firmware levels are at the latest versions supported for your DS4000 storage
subsystem:
v Controller firmware
v ESM firmware
v Drive firmware
If you discover your firmware is not up-to-date, upgrade the firmware and
software to the latest level appropriate to your DS4000 storage configuration.
firmware and software.
Attention: You must resolve Recovery Guru errors or problems before
upgrading firmware.
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Save the storage subsystem profile before performing any controller or ESM
firmware upgrades. Save the storage subsystem profile and all *.cfg files to a
server disk that will remain accessible in the event of a DS4000 storage
configuration failure.
Note: When you upgrade firmware, you must upgrade all client package
components to the same release level. For example, if you are upgrading
your controller firmware from version 6.x to version 7.x, you must also
upgrade your Storage Manager client to version 10.x or higher. If your
host system uses RDAC, upgrading controller firmware from version 6.x
to version 7.x might also require host software updates, such as RDAC
updates and HBA driver updates. Refer to the IBM DS4000 Web site for
detailed instructions.
4. Use the Storage Subsystem Profile or DS4000 Profile to verify that the following
functions are enabled:
v For all DS4000 models, Media Scan should be enabled both at the controller
level and at the LUN level.
v For all DS4000 models, the read/write cache should be enabled. In addition,
use the Storage Subsystem Profile to verify that cache is matched between
the controllers.
Web pages
IBM maintains pages on the World Wide Web where you can get the latest
technical information and download device drivers and updates.
For DS4000 information, go to the following Web site:
For the latest information about operating system and HBA support, clustering
support, SAN fabric support, and Storage Manager feature support, see the System
Storage DS4000 Interoperability Matrix at the following Web site:
Hardware responsibilities
In addition to the Health Check steps described above, regular hardware inspection
and maintenance helps to support the optimal performance of your DS4000 storage
configuration. You should periodically inspect the fibre channel components of your
DS4000 storage configuration.
The following guidelines are suggested:
v Maintain an up-to-date storage subsystem profile for your DS4000 storage
configuration. Save the profile to a server disk that will remain accessible in case
of a DS4000 storage configuration failure. Do not save the profile only to a LUN
in the DS4000 Storage Subsystem.
v Develop a Change Management plan. The plan should include schedules for
updating subsystem firmware and server host software.
Note: Some updates might require storage subsystem downtime.
v Use IBM-approved fibre channel cables for all situations. Note in your
configuration documentation whether any cables are not IBM-approved.
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v Create and maintain a cabling diagram of the current SAN configuration. Keep
this diagram updated as you make configuration changes, and keep the cabling
diagram available for review.
v Create and maintain a list of other components that are being used within the
cabling diagram (such as the host system, fibre channel switches, and other SAN
attachments).
v Ensure that all ESMs are properly seated.
v Ensure that all drives are properly seated.
v Ensure that all SFP modules are properly seated.
v Confirm fibre channel cable loop size. (IBM specifications call for at least 3-inch
cable loops, but it is recommended that you use 6-inch cable loops or longer.)
v Ensure proper fibre channel cable management.
v Ensure proper air flow and temperature for all components in your EXP810
storage configuration.
Note: You can find details on many of these inspection and maintenance
responsibilities in the appropriate sections of this document.
In addition to these inspection and maintenance responsibilities, IBM also strongly
recommends DS4000 training for staff that supports DS4000 storage configurations.
Although training is not a part of the Health Check process, DS4000 training
reduces the potential for configuration problems and contributes to the overall
health of the system.
Powering on the storage subsystem
This section contains instructions for turning the storage subsystem on under
normal and emergency situations. When you turn on and turn off the DS4700
Express, be sure to use the startup sequence in this section. If you are turning on
the storage subsystem after an emergency shutdown or power outage, see
Turning on the storage subsystem
The following procedure covers two situations:
v The entire storage subsystem has been shut down. (The main circuit breakers for
the cabinet are off.)
v Some storage expansion enclosures are being powered on while others remain
online. (The main circuit breakers for the cabinet are on.) You might encounter
this if you are adding an additional storage expansion enclosure to increase
storage capacity.
Attention:
1. Potential damage to E-DDMs - Repeatedly turning the power off and on
without waiting for the E-DDMs to spin down can damage them. Always wait
at least 70 seconds from when you turn off the power until you turn it on
again.
2. If you are connecting a power cord to a DS4700 Express Storage Subsystem
or storage expansion enclosure, turn off both of its power switches first. If the
main circuit breaker is off, be sure both power switches are off on each
storage expansion enclosure in the cabinet before turning on the main circuit
breakers.
1. Are the main circuit breakers turned on?
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v Yes - Turn off both power switches on each enclosure that you intend to
connect to the power.
v No - Turn off both power switches on all enclosures in the storage
subsystem. For dc power supply and fan units only, turn off the disconnect
devices for all of the dc power supply and fan units.
page 111 for details, depending on your model.
Note: If the power cords are not connected, turn off both power switches on
all modules in the configuration before connecting power cords or
turning on the main circuit breakers.
3. If the main circuit breakers are turned off, turn them on.
4. Verify that the link rate setting on the front of the storage expansion enclosure
matches the speed of the drives in the subsystem.
Attention: You must turn on power to each attached storage expansion
enclosure before turning on power to the DS4700 Express Storage Subsystem
to ensure that the controllers recognize all drives in the configuration during
the startup process.
5. (For models with dc power supply and fan units only) Verify that any attached
disconnect devices are turned ON.
6. Turn on both power switches on the back of each storage expansion enclosure
attached to the storage subsystem. While each storage expansion enclosure
powers up, the green and amber LEDs on the front and back of the storage
expansion enclosure turn on and off intermittently. Depending on your
configuration, it can take several minutes for each storage expansion
enclosure to power up.
Check the LEDs on the front and back of all the storage expansion enclosures.
Verify that no Needs Attention or enclosure ID LEDs light on any of the storage
expansion enclosures. To verify the fibre channel connections between the
drive expansion enclosures, make sure that no Port Bypass LEDs for
connections to other storage expansion enclosures are lit. Only the Port
Bypass LED of the ESM port that connects directly to the storage subsystem
drive port should be lit.
Note: The drive activity LEDs will flash slowly (once every 2 seconds) until the
drive is started by the DS4700 Express controller.
7. Turn on both power switches on the back of each controller in the storage
switch locations on ac power supply and fan units and see Figure 8 on page
and fan units.
Depending on the number of storage expansion enclosures in the
configuration, the storage subsystem might take several minutes to power up.
The battery self-test might take an additional 15 minutes. The LEDs will blink
intermittently until the storage subsystem powers up and completes the battery
self-test. The green Battery Charging LED will flash slowly (once every 2
seconds) until the battery is fully charged.
Before attempting any operations, wait at least five minutes for the storage
subsystem to completely power up. A storage subsystem can take up to 10
minutes to power on and up to 15 more minutes to complete its controller
battery self-test. During this time, the indicator lights on the front and back of
the module blink intermittently.
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8. Determine the status of all storage subsystems and components in the
configuration by completing the following steps:
a. Check all LEDs on each component in the storage expansion enclosures.
Ensure that all the LEDs show normal status. For more information on LED
status for storage expansion enclosures, see “Checking the LEDs” on page
125 or the Installation, User’s, and Maintenance Guide for your DS4000
storage expansion enclosure.
b. Check all LEDs on each component in the storage subsystem. Ensure that
all the LEDs show normal status. For information about LED status, see
c. Open the DS4000 Storage Manager Subsystem Management window, and
display the Physical View for the configuration.
The status for each component will be either Optimal or Needs Attention.
d. Review the status of the configuration components shown in the
Subsystem Management window by selecting the appropriate component
button for each storage subsystem.
9. Are the LEDs indicating normal operation, and is the status Optimal on all the
configuration components?
v Yes — End of procedure.
10. Diagnose and correct the fault by completing the following steps.
a. Run the DS4000 Storage Manager Recovery Guru by selecting the
Recovery Guru toolbar button in the Subsystem Management window.
b. Complete the recovery procedure.
If the Recovery Guru directs you to replace a failed component, use the
individual LEDs on the storage subsystem to locate the specific failed
component. For troubleshooting procedures, see Chapter 6, “Hardware
c. When the recovery procedure is completed, select Recheck in the
Recovery Guru. This action reruns the Recovery Guru to ensure that the
problem has been corrected.
d. If the problem persists, contact your IBM service representative.
Installing the DS4000 Storage Manager client
Refer to the IBM System Storage DS4000 Storage Manager Installation and Host
Support Guide for the appropriate operating system for instructions on how to install
the Storage Manager software. Use that document and the online help to configure
the logical drives, partitions, and so on for the RAID controllers. Use your operating
system documentation to make the new logical drives accessible to the operating
system. Do not proceed with the configuration setup until you have completed the
DS4000 Storage Manager installation.
Assemble any additional items in preparation for software installation. These items
might include the following:
v HBA drivers
v Controller firmware version listed at the IBM DS4000 System Storage Support
Web site:
v IP addresses for RAID controllers (for in-band management only)
v Additional documentation for switches and HBAs, if needed
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v Appropriate host kit for your operating system, which includes the DS4000
Storage Manager Support CD containing the appropriate Storage Manager
version and storage subsystem controller firmware.
Depending on the DS4700 Express model you order, your DS4700 Express will
ship with either the Microsoft Windows host software attachment kit or with your
choice of host software kits (Windows, AIX, Linux, Netware, SUN Solaris, HP-UX,
Linux on POWER, or VMware). The host software kit grants you permission to
attach host servers using the appropriate operating system to the DS4700
Express. The kit includes a DS4000 Storage Manager Support CD that has the
appropriate IBM DS4000 Storage Manager host software. The CD also includes
correct controller firmware version.
For the latest controller firmware and the DS4000 Storage Manager host
software for your operating systems, check the IBM support web site for DS4000
storage products.
Before any planned system shutdown or after any system additions, removals, or
modifications (including firmware updates, logical drive creations, storage
partitioning definitions, hardware changes, and so on), save the storage subsystem
profile as explained in the DS4000 Storage Manager guide for your operating
system. Save the profile in a location other than the logical drives created for the
DS4700 Express.
Always refer to the readme that is included with the DS4700 Express Storage
Subsystem firmware package (whether the firmware is accessed by the Web or CD)
for any special requirements or restrictions that apply to that particular firmware
the DS4000 readme files on the Web.
Note: Make sure that you install the DS4000 Storage Manager event monitoring
service to enable continuous monitoring of the status of the storage
subsystem. For more information about the importance of this information,
Monitoring status through software
Use the DS4000 Storage Manager client to monitor the status of the storage
subsystem. Run the software constantly, and check it frequently.
Notes:
1. You can only monitor storage subsystems that are within the management
domain of the storage-management software.
2. If you have not installed the DS4000 Storage Manager Event Monitor service as
part of the storage-management software installation, the DS4000 Storage
Manager Enterprise Management window must remain open. (If you close the
window, you will not receive any alert notifications from the managed storage
subsystems.)
For more information, see the Enterprise Management online Help.
Important: Refer to the IBM System Storage DS4000 Storage Manager Version 10
Installation and Host Support Guide for the appropriate operating
system for instructions on how to install the DS4000 Storage Manager
host software.
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In addition, to download the latest version of the DS4000 Storage
Manager host software, the DS4700 Express Storage Subsystem
controller firmware and NVSRAM, and the latest DS4000 ESM
firmware, go to the following Web site:
The DS4000 Storage Manager client provides the best way to diagnose and repair
storage-server failures. The software can help you do the following:
v Determine the nature of the failure
v Locate the failed component
v Determine the recovery procedures to repair the failure
Although the storage subsystem has Needs Attention LEDs, these LEDs do not
necessarily indicate which component has failed or needs to be replaced, or which
type of recovery procedure you must perform. In some cases (such as in the case
of a hard disk drive exceeding its PFAs), the Needs Attention LED does not turn on.
Only the DS4000 Storage Manager client can detect the failure.
For example, the recovery procedure for a Predictive Failure Analysis (PFA) flag
(impending drive failure) on a drive varies depending on the drive status (hot spare,
unassigned, RAID level, current logical drive status, and so on). Depending on the
circumstances, a PFA flag on a drive can indicate a high risk of data loss (if the
drive is in a RAID 0 volume) or a minimal risk (if the drive is unassigned). Only the
DS4000 Storage Manager client can identify the risk level and provide the
necessary recovery procedures.
Note: For PFA flags, the General-system-error LED and Drive Needs Attention
LEDs do not turn on, so checking the LEDs will not notify you of the failure,
even if the risk of data loss is high.
Recovering from a storage-server failure might require you to perform procedures
other than replacing the component (such as backing up the logical drive). The
DS4000 Storage Manager client gives these procedures.
Attention: Not following the software-recovery procedures can result in data loss.
In addition, always replace a failing component as soon as possible to minimize
additional failures that might occur, causing loss of data access.
Finding controller, storage expansion enclosure, and drive information
You can view a Storage Subsystem Profile to find controller, enclosure, and drive
information for the storage subsystem and attached storage expansion enclosures.
To view a Storage System Profile, perform the following steps:
1. Open the Storage Subsystem Management window from the DS4000 Storage
Manager Enterprise Management window.
2. Select Storage Subsystem → View → Profile.
A Storage Subsystem Profile window opens.
3. Select the Controllers tab.
4. Scroll through the list to find Board ID, Submodel ID, Product ID, and Product
revision for the storage subsystem.
5. Select the Enclosures tab.
6. Scroll through the list to find the Product ID for supported storage expansion
enclosures.
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7. Select the Drives tab.
8. Scroll through the list to find the drive values such as Product ID.
Firmware updates
Attention: Save the storage subsystem profile before performing any controller or
ESM firmware upgrades. Save the DS4700 Express storage subsystem profile and
all configuration (*.cfg) files to a server disk that will remain accessible in the event
of a DS4000 storage configuration failure. Do not save these files only to a LUN in
the DS4000 Storage Subsystem.
To ensure the optimal operation of the DS4700 Express and its attached storage
expansion enclosures, the storage expansion enclosure ESM firmware, the DS4700
Express controller firmware, the hard drive firmware, and the NVSRAM (for
controllers only) must be up to date. Go to the following Web site to get the latest
updates.
Always check the readme files that are included with the firmware packages for the
most up-to-date information about firmware prerequisites, firmware update
instructions, and host I/O restrictions, if any. Apply the necessary updates before
configuring the storage subsystem arrays and logical drives. Subscribe to My
Support for automatic notifications of firmware or Storage Manager software
updates or any important information about your DS4000 subsystems (see “Product
Attention: Read the readme file that is included in each firmware or DS4000
Storage Manager software package for any limitations, subsystem firmware
prerequisites, or download-sequence information. For example, the controller
firmware code might require the storage expansion enclosure ESM firmware to be
upgraded first to a particular version, or the controller firmware download might
require the halting of I/Os to the DS4700 Express's logical drives. Failure to observe
the limitations, prerequisites, and dependencies in the readme file might result in a
to access the DS4000 readme files on the Web.
Unless the readme file contains special requirements for the sequence in which you
upgrade firmware, you should perform firmware upgrades in the following sequence:
1. ESM firmware for the storage expansion enclosures
2. Controller firmware
3. Controller NVSRAM
4. Drive firmware
Troubleshooting the storage subsystem
The DS4000 Storage Manager is the best way to monitor the storage subsystem,
diagnose a problem, and recover from a hardware failure. You should run the
DS4000 Storage Manager continuously, and frequently check the configuration
status.
Use the following procedure to check the status of and identify a problem with the
storage subsystem. If a problem has occurred, use the DS4000 Storage Manager
client software and the LEDs on the storage subsystem to help locate a failed
component.
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1. Open the Subsystem Management window.
2. Select the component button for each storage expansion enclosure in this
storage subsystem, and view the status of each of the components.
The status for each component is either Optimal or Needs Attention.
3. Does any component have a Needs Attention status?
4. Select the Recovery Guru toolbar button. Perform the procedure in the
Recovery Guru to correct the problem. The Recovery Guru might direct you to
replace the failed component. If so, go to step 5.
Attention: If the fault requires you to power off an attached storage expansion
enclosure, you might need to cycle the power on the DS4000 storage
subsystem and all remaining storage expansion enclosures in the storage
subsystem. Contact IBM Customer and Technical Support before powering off
any attached storage expansion enclosures.
5. If applicable, mute the alarm.
6. Check the indicator LEDs on the front and the back of the storage expansion
enclosure.
A green LED denotes a normal status; an amber LED denotes a hardware fault.
7. Is an amber LED on?
v No - You are finished with this procedure. If you are still experiencing a
problem with this storage subsystem, create, save, and print a storage
subsystem profile. This information might be helpful when troubleshooting.
Contact IBM Customer and Technical Support for assistance. When the
recovery procedure is completed, select Recheck in the Recovery Guru to
rerun the Recovery Guru and to ensure that the problem has been corrected.
Checking the LEDs
The LEDs display the status of the storage subsystem and components. The color
of the LED is important.
v Green LEDs indicate a normal operating status
v Amber LEDs (Needs Attention) indicate a possible failure
v Blue LED on a CRU indicates that is safe to remove the component
The DS4700 Express Storage Subsystem also has a blue Global Locate LED that
is lit when the menu function is selected in the Subsystem Management window,
causing the LOCATE command to be sent to the DS4700 Express.
It is important to check all the LEDs on the front and back of the storage subsystem
when you turn on the power. During power up, the indicator LEDs blink
intermittently as the storage subsystem and components complete the power-up
process. In addition to checking for faults, you can use the LEDs on the front of the
storage subsystem to determine if the drives are responding to I/O transmissions
from the host.
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AC power supply and fan unit LEDs
This section describes the primary power supply and fan unit LEDs on the DS4700
Express Storage Subsystem (models 70A, 70H, 72A, and 72H).
4
3
2
1
ds470007
1
2
3
4
Figure 96. Power supply and fan unit LEDs
Table 40. Power supply and fan unit LEDs
Number LED
Normal Status
Problem Status
1
2
3
4
Power supply and fan unit On
Power
Off
Service Action Allowed
(OK to Remove)
Off
Off
On
On
On
Off
Service Action Required
(Fault)
Direct Current Enabled
DC power supply and fan unit LEDs
This section describes the primary dc power supply and fan unit LEDs on the
DS4700 Express Storage Subsystem (models 70S, 70T, 72S, 72T).
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4
3
2
1
ds470086
1
2
3
4
Figure 97. DC power supply and fan unit LEDs
Table 41. DC power supply and fan unit LEDs
Number LED
Normal Status
Problem Status
11
DC power supply and fan On
Off
unit power
2
Service Action Allowed
(OK to Remove)
Off
Off
On
On2
On2
Off
3
Service Action Required
(Fault)
41
Direct Current Enabled
Notes:
1. Although the symbols for dc power supply and fan unit power and Direct Current Enabled
LEDs are the same, the LEDs serve different purposes. The dc power supply and fan unit
power LED indicates that dc inputs to the dc power supply and fan unit are present and
good. The Direct Current Enabled LED indicates that the dc output from the dc power
supply and fan unit to the internal circuitry is good.
2. Verify that any attached disconnect device is set to On and the power switch is in the On
position when these LEDs are lit. If the disconnect device switch is at the On position, flip
it to the Off position, wait at least 15 seconds and flip it again to the On position. If these
LEDs did not change to an unlit state in 30 seconds, replace the dc power supply and fan
unit CRU.
Front LEDs
This section describes the primary LEDs and controls on the front of the storage
subsystem for all models.
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ds470103
1
2
3
4
5
6
Figure 98. Front LEDs and controls
Table 42. Front LEDs and controls
Number LED
Normal Status
Problem Status
1
2
3
Drive Activity LED
Drive Fault LED
Global Locate
On (not blinking) - No
data is being processed
Off
Blinking - Data is being
processed
Off
On (not blinking)
Blinking - Drive, volume,
or storage array locate
function
On
N/A
4
5
Global Summary Fault
Global Power
Off
On
On
Off
6
Link Rate Switch
Set to the 2 Gbps or 4
Gbps position, depending
on your configuration.
N/A
Battery unit LEDs
This section describes the primary LEDs on the storage subsystem battery units for
all models.
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3
2
1
ds470008
1
2
3
Figure 99. Battery unit LEDs
Table 43. Battery unit LEDs
Number
LED
Normal Status
Problem Status
1
Service Action
Allowed (OK to
Remove)
Off
On
2
3
Service Action
Required
(Fault)
Off
On
Battery
Charging
Green means on, Off
ready
Blinking green
means charging
The Global Power, Global Summary Fault, and Global Locate LEDs are general
indicators for the entire DS4700 Express Storage Subsystem (or configuration, in
the case of the Global Summary Fault). The Global Summary Fault LED turns on if
a fault condition is detected in any component in the storage subsystem
configuration, including all attached storage expansion enclosures. The Global
Power, Global Summary Fault, and Global Locate LEDs shine through the front
bezel.
Attention: If the Global Summary Fault LED lights, refer to the DS4000 Storage
Manager client software to determine the problem with the storage subsystem. Also,
inspect the Needs Attention LEDs on the other components in the storage
subsystem to help isolate the fault to a specific component.
Controller LEDs
This section describes the primary LEDs, controls, and connectors on the rear of
the storage subsystem controller for all models.
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4
5
13 12 11 10
9 8 9
7 6 7 6
1 2 3
8
8 9 8 9
6 7 6 7 10 11 12 13
5
4
3
2
1
Figure 100. Rear controller LEDs, controls, and connectors - Model 70
4
5
13 12 11 10
9 8 9
1 2 3
8
6
7
6
7
8 9 8 9
10 11 12 13
5
4
3
2
1
Figure 101. Rear controller LEDs, controls, and connectors - Model 72
Table 44. Rear controller LEDs, controls, and connectors
Number
LED
Normal Status
Problem Status
1
Service Action Allowed
(OK to Remove)
Off
On
2
Service Action Required
(Fault)
Off
On
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Table 44. Rear controller LEDs, controls, and connectors (continued)
Number
LED
Normal Status
Problem Status
3
Cache Active
On - Data is in cache
Not applicable
Off - Caching is turned
off. No data in cache
4
Diagnostic
On - Seven-segment
LEDs indicate diagnostic
code
Not applicable
Off - Seven-segment
LEDs indicate enclosure
ID
5
6
7
8
Heartbeat
Blinking
Off
Ethernet Link Speed
On - 100 Mbps
Not applicable
Not applicable
Off - 10 Mbps
9
Ethernet Link Activity
On - link established
Off - no link established
Blinking - activity
Off
10
Drive Channel Port
Bypass
On - No valid device
detected and port is
bypassed
(Also off if no SFP
connected)
(One LED per port)
Note: The drive channel
consists of two FC ports.
This LED indicates the
drive port bypass status
of one of the two FC
ports that comprise a
drive channel. The LED
marked 13 shows the
status of the other port.
11
12
13
Drive Channel Port 2
Bypass
Off
On - No valid device
detected and port is
bypassed
(Also off if no SFP
connected)
(One LED per port)
Note: The drive channel
consists of two FC ports.
This LED indicates the
drive port bypass status
of one of the two FC
ports that comprise a
drive channel. The LED
marked 10 shows the
status of the other port.
The L1 and L2 LEDs for each host and drive channel combine to indicate the status
and the operating speed of each host and drive channel.
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Table 45. Host and drive channel LED definitions
L1
L2
Definition
Off
Off
When both LEDs for a host or drive channel are off, this indicates one or more
of the following conditions:
v The host or drive channel ports are bad or the SFPs are faulty.
v An SFP module is inserted with no fibre channel cable attached.
Note: If the SFP is inserted in a drive port with no fibre channel attached,
the associated drive port bypassed LED will also be lit. In addition, the L1
and L2 LEDs will be unlit.
v No SFP module is inserted in one or both of the host or drive ports in the
channel.
On
Off
The host or drive channel l is operating at 1 Gbps.
Note: This pattern is not applicable in the drive port because the DS4700
Express does not support 1 Gbps fibre channel speed.
Off
On
On
On
The host or drive channel is operating at 2 Gbps.
The host or drive channel is operating at 4 Gbps.
Seven-segment numeric display LEDs
The numeric display consists of two seven-segment LEDs that provide information
display and the diagnostic LED.
Seven-
segment
display
76041
Diagnostic LED
Figure 102. Numeric display LEDs
When you power on the storage subsystem, the seven-segment LEDs show 88
before the boot firmware starts to run. After the boot code starts, - - is displayed.
When the storage subsystem is operating normally, the numeric display shows the
enclosure identification (enclosure ID) of the storage subsystem.
If an error has occurred and the Needs Attention LED is on, the numeric display
shows diagnostic information. The numeric display indicates the information is
diagnostic by illuminating an LED that appears as a decimal point between the
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display numbers. The diagnostic LED tuns off when the numeric display shows the
storage subsystem enclosure ID. The numeric display shows various diagnostic
codes as the enclosures perform the startup process after each power cycle or
reset. After diagnostics are complete, the current storage subsystem enclosure ID is
displayed.
Diagnostic codes in the form of Lx or Hx, where x is a hexadecimal digit, indicate
storage subsystem state information. In general, these codes are displayed only
when the storage subsystem is in a non-operational state. The storage subsystem
might be non-operational due to a configuration problem (such as mismatched
types), or it might be non-operational due to hardware faults. If the storage
subsystem is non-operational due to system configuration, the storage subsystem
Needs Attention LED is off. If the storage subsystem is non-operational due to a
hardware fault, the storage subsystem Needs Attention LED is on. The definitions
Table 46. Numeric display diagnostic codes
Storage Manager
Value
Controller State
Description
View
L0
Suspend
Mismatched controller Needs Attention
board ID
condition for board ID
mismatch
L2
L3
L5
Suspend
Suspend
Offline
Persistent memory
errors
Needs Attention
condition for offline
controller
Persistent hardware
errors
Needs Attention
condition for offline
controller
The alternate
controller has
Needs Attention
condition for offline
incompatible firmware controller
but automatic
controller firmware
synchronization (ACS)
cannot be performed
L7
Suspend/Offline
Controller with
Needs Attention for
offline controller
different controller
submodel ID inserted.
A DS4200 Express
controller is inserted
in a DS4700 Express
Storage Subsystem.
L8
88
Offline
Reset
Unsupported memory Need Attention
is present or memory because the controller
is not populated in
the correct memory
slots
is in offline/failed state
Controller is held in
reset by the other
controllers
Needs Attention
condition for offline
controller
Powering off the storage subsystem
The DS4700 Express is designed to run continuously. After you turn it on, do not
turn it off. Turn off the power only in the following situations:
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v Instructions in a hardware or software procedure require that you turn off the
power.
v An IBM technical support representative instructs you to turn off the power.
Turning off the storage subsystem
Use the following procedure to turn off the power for the DS4700 Express.
Attention: Except in an emergency, never turn off the power if any Needs
Attention LEDs are on. Correct the fault before you turn off the power. Use the
DS4000 Storage Manager client and the Needs Attention LEDs to check the overall
status of the DS4700 Express. All LEDs should be green on the front of the storage
subsystem. If they are not, use the DS4000 Storage Manager client to diagnose the
problem. This ensures that the DS4700 Express will power up correctly later.
The DS4700 Express is designed to run continuously. After you turn on the DS4700
Express, do not turn it off. Turn off the power only in the following situations:
v Instructions in a hardware or software procedure require that you turn off the
power.
v An IBM technical support representative instructs you to turn off the power.
Statement 5:
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
2
1
CAUTION:
This unit has more than one power source. To remove all power from the unit,
all dc MAINS must be disconnected.
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Attention: Turning off and turning on power without waiting for the storage
subsystem disk drives to spin down can damage the drives and might cause data
loss. Always let at least 70 seconds elapse from when you turn off the power until
you turn on the power again.
Power-off overview
Review the following information before you continue with the power-off
procedure below.
Turn off the power to each device based on the following shutdown sequence:
1. Turn off power to the host before the storage subsystem. If the host must
stay powered on to support an existing network, see the operating system
documentation for information about disconnecting the storage subsystem
logical drives from the host before the storage subsystem is powered off.
2. Turn off power to the storage subsystem before you turn off power to the
storage expansion enclosures. Turn off both power supply switches on the
back of the storage subsystem.
3. (DS4700 Express dc models only) Turn off power to attached disconnect
devices.
4. Turn off power to other supporting devices (for example, management
stations, fibre-channel switches, or Ethernet switches).
Note: You do not need to perform this step if you are servicing only the
storage subsystem.
Use the following procedure to turn off power to one or more storage subsystems
for a planned shutdown. To turn off power for an unplanned shutdown, see
Before proceeding, use the Storage Manager client to determine the status of the
system components and special instructions. The operating system software might
require you to perform other procedures before you turn off the power.
1. Stop all I/O activity to each storage subsystem.
2. Remove the front cover from the storage subsystem, if applicable.
3. Determine the status of all storage subsystems and components in the
configuration by completing the following steps:
a. Check all LEDs on each component in the storage expansion enclosures.
Ensure that all the LEDs show normal status.
b. Check all LEDs on each component in the storage subsystem. Ensure that
all the LEDs show normal status.
c. Open the Subsystem Management window for the configuration and
display the Physical View for the configuration.
d. Review the status of the configuration components shown in the
Subsystem Management window by selecting the appropriate component
button for each storage subsystem.
The status for each component will be either Optimal or Needs Attention.
4. Are the LEDs indicating normal operation, and is the status Optimal on all
configuration components?
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5. To diagnose and correct the fault, complete the following steps:
a. Run the Recovery Guru by selecting the Recovery Guru toolbar button in
the Subsystem Management window.
b. Complete the recovery procedure.
If the Recovery Guru directs you to replace a failed component, use the
individual LEDs to locate the failed component.
c. When the recovery procedure is completed, select Recheck in the
Recovery Guru. This action reruns the Recovery Guru to ensure that the
problem has been fixed.
d. If the problem has not been fixed, contact your IBM service representative.
Do not turn off power until all problems are corrected.
6. Check the Cache Active LED, and verify that it is off.
If the Cache Active LED is on steady, the cache contains data. Wait for the
data to clear from cache memory before turning off the power.
7. Check the LEDs on the storage expansion enclosures to verify that all Drive
Active LEDs are on steady (not blinking).
If one or more LEDs are blinking, data is being written to or from the drives.
Wait for all Active LEDs to stop blinking.
8. Turn off the power switch on the back of each controller in the storage
subsystem.
Note: Until the power switch on each controller is turned off, power still
remains turned on for the both controllers; therefore, the seven-segment
display on each controller stays on until the power switch on each
controller is turned off.
9. Turn off both power switches on the back of each storage expansion enclosure
in the configuration.
CAUTION:
The power switch on the power supply and fan unit does not turn off the
electrical current supplied to the device. The DS4700 Express Storage
Subsystem might also have more than one connection to dc power. To
remove all electrical current from the device, ensure that all dc power
cords are disconnected from the power supply and fan unit dc input
connectors.
10. (Models with dc power supplies and fan units only) Flip all of the disconnect
devices to the OFF position.
11. Remove (unplug) all of the power cords from the DS4700 Express power
supply connectors.
12. After you perform the necessary maintenance procedures, turn on the power
using the procedure in “Turning on the storage subsystem” on page 119.
Performing an emergency shutdown
Attention: Emergency situations might include fire, flood, extreme weather
conditions, or other hazardous circumstances. If a power outage or emergency
situation occurs, always turn off all power switches on all computing equipment.
This helps to safeguard your equipment from potential damage due to electrical
surges when power is restored. If the storage subsystem loses power unexpectedly,
it might be due to a hardware failure in the power system or in the midplane.
Complete the following steps to shut down the system during an emergency:
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1. If you have time, stop all I/O activity to the storage subsystem by shutting down
the host or disconnecting the storage subsystem logical drives through the host.
2. Check the LEDs. Make note of any Needs Attention LEDs that are on so you
can correct the problem when you turn on the power again.
3. Turn off all power supply switches, starting with the DS4700 Express storage
subsystem first, and followed by the storage expansion enclosures. Then,
unplug the power cables from the storage subsystem.
CAUTION:
The power switch on the power supply and fan unit does not turn off the
electrical current supplied to the device. The DS4700 Express Storage
Subsystem might also have more than one connection to dc power. To
remove all electrical current from the device, ensure that all dc power
cords are disconnected from the power supply and fan unit dc input
connectors.
Restoring power after an unexpected shutdown
Use the following procedure to restore power to the storage subsystem in a
configuration after an unplanned shutdown.
Risk of severe electrical shock – Never turn on the power to any equipment if
there is evidence of fire, water, or structural damage. Doing so might cause severe
electrical shock
1. After the emergency situation is over or power is restored, visually check the
storage subsystem for damage. Is there evidence of damage to any of the
storage subsystem components, cables, or equipment attached to the storage
subsystem?
v Yes – Do not continue with this procedure. Contact your IBM service
representative for assistance. Depending on the current service agreements,
you might need to return the equipment to the factory or local service center
for repair.
Potential data loss – Before resetting circuit breakers in the cabinet, ensure
that the storage subsystem and storage expansion enclosures power
switches are turned off. Resetting circuit breakers after an emergency
situation while the storage subsystem and storage expansion enclosure
power switches are turned on can cause potential data loss because the
configuration components might not be powered on in the correct sequence.
correct power-on sequence.
2. After you check the storage subsystem for damage, ensure that the power
switches are in the off position; then plug in the DS4700 Express power cables,
if required.
3. Check the system documentation of the hardware devices that you want to turn
on and determine the proper startup sequence.
Note: Be sure to turn on all of the storage expansion enclosures and verify that
there are not any ESM or power supply and fan unit fault LEDs lit before
you turn on the DS4700 Express.
In addition, consider the following items:
v The storage subsystem supports simultaneous power-up of the system
components; however, you should always follow the power-up
sequence listed in the “Turning on the storage subsystem section” of
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the appropriate DS4000 Storage Subsystem Installation, User's, and
Maintenance Guide during any attended power-up procedure.
v A storage subsystem in an optimal state should recover automatically
from an unexpected shutdown and unattended simultaneous
restoration of power to system components. After power is restored,
contact IBM technical support if any of the following conditions occur:
– The storage subsystem logical drives and subsystems do not
display in the Storage Manager graphical user interface (GUI).
– The storage subsystem logical drives and subsystems do not come
online.
– The storage subsystem logical drives and subsystems seem to be
degraded.
4. Turn on the power to each device, based on the startup sequence.
5. (DS4700 Express dc models only) Turn on any attached disconnect devices.
6. Turn on both of the power supply switches on the DS4700 Express. The green
LEDs on the front and the back of the DS4700 Express should remain lit. If
other amber Fault LEDs light, see “Solving problems” on page 183.
Recovering from an overheated power supply and fan unit
Each storage subsystem contains two power supply and fan units. Each power
supply and fan unit contains a built-in temperature sensor designed to prevent it
from overheating. Under normal operating conditions, with an ambient air
temperature range of 10° C to 35° C (50° F to 95° F), the fans in the power supply
and fan units maintain a proper operating temperature inside the module.
If the internal temperature reaches 65° C (149° F), the power supply shuts down
automatically. If both power supplies shut down because of overheating, the module
has no power, and all indicator lights are off.
The following factors can cause the power supplies to overheat:
v An unusually high room temperature
v Fan failures in the power supply and fan units
v Defective circuitry in the power supply
v Blocked air vents
v Failures in other devices in the configuration or cabinet
v Dirty filter in the Telco bezel
If a fan failure causes overheating or the operating environment becomes too hot
(greater than 55° C), the Global Fault LED on the storage expansion enclosure
turns on. The power supply and fan unit Fault and Service Action Allowed (SAA)
LEDs on the back of the storage subsystem also turn on. “Controller LEDs” on page
129 shows the location of these LEDs.
Attention: Because the power supply and fan unit CRU Fault and SAA LEDs are
lit when the operating environment temperature is too hot (greater than 55° C), do
not assume the power supply and fan unit CRU is bad. Take action to cool down
the environment first. When the operating environment temperature is within the
specified operating environment range, the power supply and fan unit Fault and
SAA LEDs will be unlit if there are no problems with the power supply and fan unit
CRU.
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If the module temperature exceeds 45° C (113° F), the storage management
software displays a Needs Attention icon in the Subsystem Management window. If
event monitoring is enabled, and event notification is configured, the software
issues the following two critical problem notifications:
v If one power supply shuts down, the storage management software displays a
Needs Attention status in the Subsystem Management window.
v If both power supplies shut down, the module shuts down, and the storage
management software displays a Not Responding status in the Array
Management window.
Use the following procedure to resume normal operation after a power supply
shutdown.
Attention: Risk of damage from overheating - The power supplies
automatically shut down when the air temperature inside the cabinet reaches 68°
C (154° F). If the power supplies shut down, immediately remove all cabinet
panels to help cool the cabinet air temperature and to prevent damage to the
DS4000 storage subsystem configuration components.
1. Remove the front cover.
2. If applicable, mute the alarm.
124 to identify an overheating problem?
page 124 to verify that the power supplies have shut down because of an
overheating problem, and then go to step 4.
4. Stop I/O activity to the storage subsystem and all attached storage expansion
enclosures.
5. Take all or some of the following measures to alleviate the overheating
problem:
v Removing all panels from the cabinet immediately
v Using external fans to cool the area
v Shutting down the power to the storage expansion enclosure, using the
procedure described in “Performing an emergency shutdown” on page 136
6. Wait for the air temperature in and around the storage subsystem to cool.
After the temperature inside the power supplies cools to below 65° C (149° F),
the storage subsystem is capable of power-up recovery without operator
intervention. After the air has cooled, the power supplies should turn on
automatically. If the power supplies restart automatically, the controllers will
reset and return to normal operation.
7. Did the power supply and fan units restart automatically?
8. Turn off the power switch on each controller in the storage subsystem, power
off all connected storage expansion enclosures, and flip the disconnected
devices to the OFF position (for models with dc power supply and fan unit
CRUs only). Wait 1 minute and then turn on power to all connected storage
expansion enclosures and flip the disconnected devices to the ON position (for
models with dc power supply and fan unit CRUs only).
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CAUTION:
The power switch on the power supply and fan unit does not turn off the
electrical current supplied to the device. The DS4700 Express Storage
Subsystem might also have more than one connection to dc power. To
remove all electrical current from the device, ensure that all dc power
cords are disconnected from the power supply and fan unit dc input
connectors.
While the storage expansion enclosure powers up, the LEDs on the front and
the back of the module blink intermittently. Depending on your configuration,
the storage expansion enclosure can take between 20 seconds and several
minutes to power on.
9. Turn on both power switches on the back of the storage subsystem.
A storage subsystem can take 10 seconds to power on and up to 15 minutes
for the battery self-test to complete. During this time, the LEDs on the front
and the back of the modules blink intermittently.
10. Check the status LEDs on the front and back of the storage subsystem.
a. Note the status of the LEDs on the front and back of each module.
A green LED indicates a normal status; amber LEDs indicate a hardware
fault.
b. Open the Subsystem Management window for the storage array.
c. Select the appropriate components button for each module in the Physical
View of the Subsystem Management window to view the status of its
components.
The status for each component is either Optimal or Needs Attention.
11. Does each module display green LEDs only, and is the status Optimal for each
module component?
12. Diagnose and correct the fault.
a. To run the Recovery Guru, select the Recovery Guru toolbar button in the
Subsystem Management window.
b. Complete the recovery procedure.
If the Recovery Guru directs you to replace a failed component, locate and
troubleshoot that component. See “Checking the LEDs” on page 125.
c. When the procedure is completed, rerun the Recovery Guru to ensure that
the problem has been corrected by selecting Recheck in the Recovery
Guru.
d. If the problem persists, contact IBM Customer and Technical Support.
13. Replace the bezel on the storage expansion enclosure, if applicable.
Cache memory and cache battery
Each RAID controller in the DS4700 Express Storage Subsystem contains either 1
GB or 2 GB of cache memory to store read and write operations. (Both RAID
controllers in the DS4700 Express must have the same amount of cache memory.)
The battery unit in each controller can maintain the data in the RAID controller
caches for up to three days in the event that the DS4700 Express Storage
Subsystem loses power.
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Attention: There are different replacement FRU part numbers for the DS4700
Express controller with certain cache sizes. The DS4700 Express Storage
Subsystem profile has the information on the installed cache memory size in the
DS4700 Express controllers. Refer to the storage subsystem profile and see “Parts
listing” on page 188 for the correct FRU part number for the DS4700 Express
controller.
Cache memory
Cache memory is memory on the RAID controller that is used for intermediate
storage of read and write data on the DS4700 Express RAID controllers. Using
cache memory can increase system performance. The data for a read operation
from the host might be in the cache memory from a previous operation (thus
eliminating the need to access the drive itself), and a write operation is completed
when it is written to the cache, rather than to the drives.
The RAID controller has a Cache Active LED that displays the current status of the
cache. The LED is on if there is data in the cache, and it is off if there is no data in
the cache.
If caching is enabled and the Cache Active LED never comes on during I/O activity,
it indicates one of the following conditions:
v The cache memory from either controller A or controller B has failed.
v The cache sizes in controller A and controller B are not the same.
v The battery has failed. (In this case, one or both of the green Battery LEDs will
be off and one or both amber Battery Needs Attention LEDs will be lit.)
Note: Always use the DS4000 Storage Manager client to check your cache
memory settings before assuming a hardware failure.
Figure 103 shows the locations of the Cache Active LEDs on the front of the RAID
controllers.
1
1
Figure 103. Cache Active LEDs
Number
Description
1
Cache Active LED
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Subsystem cache battery
The battery unit in each controller provides backup power to maintain any cached
data not written to disks in the event of a power loss. The battery units can provide
power to the data caches in the RAID controllers for up to three days.
Statement 2:
CAUTION:
When replacing the lithium battery, use only an equivalent type battery
recommended by the manufacturer. If your system has a module containing a
lithium battery, replace it only with the same module type made by the same
manufacturer. The battery contains lithium and can explode if not properly
used, handled, or disposed of.
Do not:
v Throw or immerse into water
v Heat to more than 100° C (212° F)
v Repair or disassemble
Dispose of the battery as required by local ordinances or regulations.
Replace the battery units in the DS4700 Express when they are identified as failing
by the DS4000 Storage Manager Subsystem Management window, or when the
Battery LEDs or Battery Needs Attention LEDs light. These LEDs are located on the
power supply and fan units and on the battery unit respectively, as shown in
Replace only the battery unit that is indicated as failed by the LEDs or in the
DS4000 Storage Manager Subsystem Management window. You do not need to
replace both battery units when the Battery LEDs indicate that only one battery unit
has failed.
If the battery age expires, do not call IBM technical support to replace the battery.
Instead, reset the battery age using the procedure described in the Storage
Manager online help. You should only replace the battery when it is in a failed state,
as indicated by the Storage Manager Recovery Guru.
Each power supply and fan unit has green Battery LEDs on the back that indicates
the battery status of each battery unit, as follows:
v The LED is on and remains steady when the battery is fully charged.
v The LED flashes when the battery is charging or performing a self-test.
v The LED is off if the battery or the battery charger has failed.
The battery unit also has a battery failure indicator LED that is located on the
battery unit. This LED will light if the battery fails to hold a charge.
The battery performs a self-test at startup and every 25 hours thereafter (during
which time the Battery LED flashes). If necessary, the battery begins recharging at
that time. If the battery fails the self-test, the Battery LED turns off, indicating a
battery fault.
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Data caching starts after the battery completes the startup tests.
Attention: Write caching is suspended while a battery pack is either charging or
self-testing.
Figure 104 shows the location of the Battery LEDs.
3
2
1
ds470008
1
2
3
Figure 104. Battery unit LEDs
Table 48. Battery unit LEDs
Number
LED
Normal Status
Problem Status
1
Service Action
Allowed (OK to
Remove)
Off
On
2
3
Service Action
Required
(Fault)
Off
On
Battery
Charging
Green means on, Off
ready
Blinking green
means charging
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Chapter 5. Replacing components
This chapter contains information about replacing a controller, bezel, filter and filter
retainer, E-DDM CRU, power supply and fan unit CRU, dc power supply and fan
unit CRU, battery unit, SFP module, and midplane.
Attention: Always replace a failed component as soon as possible. The Recovery
Guru menu function in the DS4700 Express Storage Subsystem identifies failed
components.
Handling static-sensitive devices
Attention: Static electricity can damage electronic devices and your system. To
avoid damage, keep static-sensitive devices in their static-protective packages until
you are ready to install them.
To reduce the possibility of electrostatic discharge, observe the following
precautions:
v Limit your movement. Movement can cause static electricity to build up around
you.
v Handle the device carefully, holding it by its edges or its frame.
v Do not touch solder joints, pins, or exposed printed circuitry.
v Do not leave the device where others can handle and possibly damage the
device.
v While the device is still in its static-protective package, touch it to an unpainted
metal part of the storage subsystem for at least two seconds. This drains static
electricity from the package and from your body.
v Remove the device from its package and install it directly into your storage
subsystem without setting it down. If it is necessary to set the device down, place
it in its static-protective package. Do not place the device on your storage
subsystem cover or any metal surface.
v Take additional care when handling devices during cold weather because heating
reduces indoor humidity and increases static electricity.
Service Action Allowed Status LED
Each controller, power supply and fan unit, and battery unit has a blue Service
Action Allowed status LED. The purpose of the Service Action Allowed status LED
is to help ensure that a component is not removed before it is safe to do so. Do not
remove any storage subsystem component unless the component's Service Action
Allowed status LED is lit.
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Attention
Never remove a controller, power supply and fan unit, or battery unit unless
the Service Action Allowed status LED is turned on. Doing so can result in a
potential loss of data availability. If the Needs Attention LED is lit and the
associated Service Action Allowed status LED is not lit, then you must perform
additional diagnostics before you can remove the indicated component. Use
the Recovery Guru instructions in the DS4000 Storage Manager Subsystem
Management window or refer to the appropriate component replacement
instructions in this chapter for the additional diagnostics required in this case.
The Service Action Allowed status LED automatically turns on or off as conditions
change. Wait at least two minutes after you replace each component for the
controller to recognize the new component and update the LED status. In most
cases when a single component fails, the Service Action Allowed status LED turns
on steadily when the Needs Attention status LED is turned on for the component.
Replacing a controller
Attention: Before you replace a controller, verify the following:
v The replacement controller part number matches the part number of the
controller to be replaced. To provide full functionality, the two controllers should
have the same cache memory capacity and FRU part number. Inserting a
non-compatible controller causes the controller to be placed in a lockout state by
the other controller in the DS4700 Express chassis.
Note: The DS4700 Express Storage Subsystem controller FRU is not compatible
with the DS4200 Express Storage Subsystem controller FRU.
v Both power supply and fan units must be connected and powered on with no
Needs Attention LEDs lit. Ensure that the Power LEDs on each of the power
supply and fan units are lit. If either of the power supply and fan units is not
optimal, it is recommended that you replace that component before you proceed
with the controller replacement procedure.
v If you are replacing an optimal controller, first make sure that the other controller
is optimal and that the fibre channel path from the hosts to the other controller is
also optimal.
Each controller has a unique hardware Ethernet address, which is printed on a label
on the front.
Use the following procedure to replace a controller in an DS4700 Express Storage
Subsystem:
1. Use the DS4000 Storage Manager client software to print a storage subsystem
profile. Move logical drive ownership to the other controller. If the controller you
are replacing has failed but is still operating, move the failed controller to an
Offline state.
Attention: Never remove a controller unless the Service Action Allowed
status LED is turned on. Doing so can result in a potential loss of data.
2. Locate the failed controller by checking the Needs Attention status LEDs on
the controllers in the storage subsystem.
3. Is the Service Action Allowed status LED turned on?
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v No – Another component might require attention before you can remove the
controller. Use the Recovery Guru function in the DS4700 Express
Subsystem Management window to identify and correct any additional
Electrostatic discharge can damage sensitive components. Touching the
storage subsystem or its components without using a proper ground might
damage the equipment. To avoid damage, use proper antistatic protection
while handling any components.
4. Put on antistatic protection.
5. Unpack the new controller. Save all packing materials in the event you need to
return the new controller.
6. Determine whether the replacement controller will serve as controller A or
controller B (controller A is inserted in the left controller bay; controller B is
inserted in the right controller bay), and then apply the controller labels for host
channels, drive channels, and numeric display to the replacement controller.
The controller labels and instructions are included with the replacement
controller. Make sure that the labels are aligned properly and do not cover any
ports or LEDs.
Attention: Handle and install fiber-optic cables properly to avoid degraded
performance or loss of communications with devices. For specific handling
guidelines, see “Handling fibre-optic cables” on page 57.
7. Disconnect all attached interface cables from the failed controller, including the
SFP modules. Ensure that you label each cable so that you can reconnect
them correctly to the new controller.
Use the following procedure to remove the SFPs from the RAID controller that
has failed:
a. Remove the LC-LC fibre-channel cable from the SFP module. For more
information, see “Handling fibre-optic cables” on page 57.
b. Unlock the SFP module latch:
v For SFP modules that contain plastic tabs, unlock the SFP module latch
by pulling the plastic tab outward 10°, as shown in Figure 105.
Plastic tab
Protective cap
10o
SFP module
Figure 105. Unlocking the SFP module latch - plastic variety
v For SFP modules that contain wire tabs, unlock the SFP module latch by
pulling the wire latch outward 90°, as shown in Figure 106 on page 148.
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Wire tab
Protective cap
o
90
SFP module
Figure 106. Unlocking the SFP module latch - wire variety
c. With the SFP latch in the unlocked position, extract the SFP module.
v For SFP modules that contain plastic tabs, slide the SFP module out of
the port.
v For SFP modules that contain wire tabs, grasp the wire latch and pull
the SFP module out of the minihub port.
d. Replace the protective cap on the SFP module.
e. Place the SFP module into a static-protective package.
f. Replace the protective cap on the port.
8. Squeeze the controller latch and pull the lever open 90° (so that the lever is
horizontal) to release the controller from the latch. The controller latch is a
coral colored tab on the lever.
Note: The lever rotates upward or downward 90°, depending on whether the
controller you are removing is the right or left controller CRU.
9. Slowly pull the lever away from the chassis to remove the controller from the
controller sliding from the storage subsystem chassis.
ds470010
Lever
Figure 107. Removing a controller from the DS4700 Express
10. If the new controller does not have the cache battery backup unit already
remove the cache backup battery from the existing controller unit and insert it
into the new controller CRU.
11. Install the new controller.
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a. Slide one controller into the empty slot in the storage subsystem. Be sure
that the lever is pulled straight out as you slide the controller in, as shown
in Figure 108.
Notch
Guide pin
Lever
Figure 108. Installing a controller
b. As you slide the controller into the empty slot, make sure the guide pins on
the side of the controller fit into the notches. After the guide pins fit into the
notches and the controller fits snugly into the bay, push the lever downward
or upward 90°, depending on whether the controller is inserted in the A or
B controller bay to fully latch it into place. Do not force fit. The controller is
designed to prevent it from being inserted into the chassis incorrectly.
Attention: Make sure that the levers lock into place in the storage
subsystem chassis.
c. Repeat step a and step b to replace the second controller.
12. Wait up to 5 minutes for the DS4000 Storage Manager client software to
recognize the new controller.
13. Complete any remaining Recovery Guru procedures for controller replacement,
if needed.
14. Check the LEDs on the new controller to verify that the controller is fully
operational.
15. Remove the antistatic protection.
16. Use the DS4000 Storage Manager client Subsystem Management window to
check the status of all components in the storage subsystem.
v If the new controller is online and the DS4000 Storage Manager client
Subsystem Management window indicates normal operation, go to step 19
v If the new controller is online and the DS4000 Storage Manager client
Subsystem Management window indicates a problem status, go to
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17. If the newly inserted controller is in an offline state, see the DS4000 Storage
Manager client online help for instructions on bringing the controller online.
If necessary, open the DS4000 Storage Manager Subsystem Management
window and place the controller on-line; select the off-line controller and click
Advanced ꢀ Recovery ꢀ Place controller online.
Subsystem Management window to identify any new faults. Do any storage
subsystems have a fault (Needs Attention) status?
v Yes – Select the Recovery Guru toolbar button in the Subsystem
Management window, and complete the recovery procedure. If the problem
persists, contact your IBM service representative.
19. Use the DS4000 Storage Manager client software to print a new storage
subsystem profile.
Removing and replacing a bezel
To access the filter and filter retainer as well as the E-DDMs, you must remove the
DS4700 Express bezel.
To remove and replace a bezel, perform the following steps:
1. Grasp the sides of the bezel and pull it slowly toward you to remove it, as
shown in Figure 109.
2. To replace the bezel, grasp the sides of the bezel and snap it onto the DS4700
Express chassis, as shown in Figure 109.
Figure 109. Removing and replacing a bezel
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Replacing a filter and filter retainer
Note: Inspect the filter as needed. Replace the filter every three months or sooner,
depending on your environment.
Complete the following steps to replace a filter and filter retainer:
1. Remove the bezel by grasping the sides of the bezel and pulling it slowly
toward you, as shown in Figure 109 on page 150.
2. Place the bezel face down on a level surface.
3. Remove the filter retainer and filter from the bezel by pressing the blue tabs
toward the edge of the bezel.
4. Flip the filter retainer over and remove the filter.
5. Remove the new filter from the packaging materials and carefully place it in the
filter retainer.
Note: Make sure the filter is fitted under all the holding tabs on the filter
retainer frame.
6. Flip the filter retainer over, line it up with the bezel opening and slightly push the
retainer into place.
7. Grasp the sides of the bezel and snap it onto the DS4700 Express chassis, as
shown in Figure 109 on page 150.
Working with hot-swap E-DDMs
This section explains how you can increase the storage subsystem capacity by
adding more E-DDMs or by replacing existing E-DDMs with ones that have a larger
capacity.
Before you begin, complete the following tasks:
v Ensure that your current system configuration is working properly.
v Back up all important data before you make changes to data storage devices.
Before you install or remove E-DDM CRUs, review the following information:
v Blank trays: A storage subsystem without a full set of E-DDMs (16) contains
blank trays in the unused drive bays. Before installing new E-DDMs, you must
remove these empty trays. Save the empty trays for future use. Each of the 16
bays must always contain either a blank tray or a hot-swap E-DDM.
For proper cooling and EMC protection, do not leave a drive slot open without
either a drive blank or a E-DDM CRU inserted.
v E-DDM CRUs:
– The DS4700 Express Storage Subsystem supports 2 or 4 Gbps fibre channel
and SATA E-DDMs. The Link Rate setting speed must be set accordingly. See
“Verifying the Link Rate setting ” on page 161 for more information.
– When adding E-DDM CRUs, if you are not installing all 16 E-DDM CRUs into
the storage subsystem, install the E-DDM CRUs from left to right
consecutively.
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– For optimum performance, never insert a E-DDM into a storage subsystem
without first confirming the drive firmware level. In the event of a drive
firmware mismatch, schedule down time as soon as possible to upgrade the
drive firmware to the same version. For information about supported drive
firmware versions, refer to the DS4000 Support Web site:
– Use of non-supported drives in the drive modules can cause the storage
subsystem to fail.
– In configurations with mixed storage expansion enclosures, all storage
expansion enclosures on a fibre loop must be operating at the same interface
speed.
– Ensure that the speed of the E-DDM CRU you are adding is supported in the
storage subsystem. For example, do not install a 2 Gbps E-DDM CRU in a
storage subsystem that supports only 4 Gbps E-DDMs.
– E-DDM CRUs are not interchangeable between EXP710 and EXP810 storage
expansion enclosures.
– After you remove a E-DDM CRU, wait 70 seconds before replacing or
reseating it to allow it to properly spin down. Failure to do so may cause
undesired events.
Attention
Before powering on the DS4700 Express Storage Subsystem, it must be
populated with at least two E-DDMs. If at least two E-DDMs are not
installed in each attached storage expansion enclosure or DS4700 Express
Storage Subsystem, when you power on the DS4700 Express and its
attached storage expansion enclosures, your standard storage partition key
might be lost and must be regenerated using instructions on the IBM
DS4000 Solutions and Premium Features Web site:
In addition, the resulting insufficient load to the enclosure power supplies
might cause them to intermittently appear as failed, falsely indicating the
power supplies are bad. All drives in the DS4700 Express Storage
Subsystem and the connected storage expansion enclosure or enclosures
must contain no prior configuration data.
v E-DDM CRU labels: A label is provided on the front of each E-DDM. Use this
label to record the location information for each E-DDM before you remove it.
Ensure that you keep track of the E-DDMs and their corresponding bays. Also,
in the wrong bay, you might lose data.
v E-DDM LEDs: Each E-DDM CRU tray has two associated LEDs, a green Activity
LED and an amber Fault LED. These LEDs indicate the status for that drive. See
v E-DDM CRUs are not interchangeable between the DS4700 Express and other
DS4000 storage subsystems.
Table 49. Drive LED activity
LED
LED state
Descriptions
Activity LED
Flashing green The green LED flashes to indicate fibre-channel activity to
the drive.
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Table 49. Drive LED activity (continued)
LED
LED state
Descriptions
Activity LED
Steady green
The green LED lights to indicate that the drive is properly
installed and is spun up by the DS4000 controller.
Fault LED
Fault LED
Flashing
amber
The amber LED flashes to indicate that a drive has been
identified by the software.
Steady amber The amber LED lights to indicate a drive failure due to bad
or uncertified drive. The green activity LED might flash
once every 2 seconds, remain steady green, or be unlit.
Activity and
Fault LEDs
All unlit
Check for and resolve one of the following situations:
v DS4700 Express is turned off.
v DS4700 Express link rate speed is not set correctly.
Activity LED
Flashing once Check for and resolve one of the following situations:
every 2
seconds
v The controller did not complete the boot process.
v DS4000 storage subsystem controller firmware is not
correct.
Activity and
Fault LEDs
Flashing
together in a
certain pattern
Drive failure due to the incorrect link rate speed setting or
internal drive hardware failures.
v Fibre-channel loop IDs: When you install a E-DDM in the storage subsystem,
the drive tray connects into a printed circuit board called the midplane. The
midplane sets the fibre-channel loop ID automatically, based on the setting of the
enclosure ID switch and the physical location (bay) of the drive CRU.
v Hot-swap hardware: The DS4700 Express contains hardware that enables you
to replace a failed E-DDM without turning off the storage subsystem. You can
continue to operate your system while an E-DDM is removed or installed. These
E-DDMs are known as hot-swap E-DDMs.
Installing hot-swap E-DDMs
With the exception of the DS4000 storage subsystem initial power up, add E-DDMs
while the storage subsystem is turned on and running. Complete the following steps
to install hot-swap E-DDMs in the storage subsystem:
Attention:
v After you remove a E-DDM CRU, wait 70 seconds before replacing or reseating
it to allow it to properly spin down. Failure to do so may cause undesired events.
v The DS4700 Express and EXP810 E-DDMs and FRUs are not compatible with
the DS4200 Express and EXP420 EV-DDMs and FRUs.
1. Read the documentation that comes with the E-DDM.
lit, see “Solving problems” on page 183.
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Figure 110. Hot-swap E-DDM LEDs
3. Determine the bay into which you want to install the E-DDM.
4. Remove the blank tray by doing the following:
a. Release the latch on the E-DDM CRU by pressing on the inside of the
bottom of the tray handle.
b. Lift the closed latch to its open position. (The latch is at a 90° angle to the
front of the E-DDM when open.)
c. Pull the blank tray out of the bay.
d. Save the blank tray for later use.
5. Install the E-DDM by doing the following:
Note: The hard disk drive comes installed in a drive tray. Do not attempt to
detach the drive from the tray.
a. Release the latch on the drive CRU by pressing on the inside of the bottom
of the tray handle.
b. Pull the handle on the tray out so that it is in the open position, as shown in
Tray handle
Tray latch
Figure 111. E-DDM CRU handle
c. Slide the E-DDM CRU into the empty bay until the hinge of the tray handle
latches beneath the storage subsystem bezel or the adjacent E-DDM CRU
bezel.
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Note: Make sure that the EMC gasket does not snag on the bezel.
d. Push the tray handle down until it latches into place.
Replacing hot-swap E-DDMs
E-DDM problems include any malfunctions that delay, interrupt, or prevent
successful I/O activity between the hosts and the E-DDMs in the storage
subsystem. This includes transmission problems between the host controllers and
the E-DDMs. This section explains how to replace a failed E-DDM.
Note: If you want to remove an E-DDM that is not in a failed or bypass state,
always use the Storage Manager client program either to place the E-DDM
in a failed state or to place the array that is associated with the E-DDM (or
E-DDMs) in an offline state before you remove it from the storage
subsystem.
Attention: Failure to replace the E-DDMs in their correct bays might result in loss
of data. If you are replacing an E-DDM that is part of a configured array and logical
drive, ensure that you install the replacement E-DDM in the correct bay. Check the
hardware and software documentation that is provided with your DS4000 to see if
there are restrictions regarding E-DDM configurations.
Complete the following steps to replace a hot-swap E-DDM:
1. Use the DS4000 Storage Management client software to print a new storage
system profile.
2. Determine the location of the E-DDM that you want to remove.
Attention: Never hot-swap a E-DDM CRU when its associated green Activity
LED is flashing. Hot-swap a E-DDM CRU only when its associated amber Fault
LED is lit and not flashing.
3. Put on antistatic protection.
4. Remove the E-DDM CRU by doing the following:
a. Release the latch on the E-DDM CRU by pressing on the inside of the
bottom of the tray handle, as shown by the arrow in Figure 111 on page 154.
b. Pull the tray handle out into the open position.
c. Pull the E-DDM CRU about 1/2 inch out of the bay and wait 70 seconds to
allow the E-DDM to properly spin down and the storage subsystem
controller to properly recognize that an E-DDM is removed from the
configuration. .
d. Verify that there is proper identification (such as a label) on the E-DDM
CRU, and then slide it completely out of the storage subsystem.
5. Unpack the new E-DDM. Save all packing material in case you need to return it.
6. Install the new E-DDM CRU by doing the following:
a. Gently push the E-DDM CRU into the empty bay until the hinge of the tray
handle latches beneath the storage subsystem enclosure bezel.
b. Push the tray handle down into the closed (latched) position.
7. Check the E-DDM LEDs by doing the following:
v When a E-DDM is ready for use, the green Activity LED lights and the amber
Fault LED is off.
v If the amber Fault LED lights and is not flashing, remove the E-DDM from the
unit and wait 70 seconds; then, install the E-DDM again.
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Attention: After you remove a E-DDM CRU, wait 70 seconds before replacing
or reseating the E-DDM CRU to allow it to properly spin down. Failure to do so
may cause undesired events.
8. Use the DS4000 Storage Manager subsystem management window to verify
that the E-DDM is shown in the Storage Subsystem Management window.
Replacing multiple E-DDMs
This section provides guidelines for upgrading the E-DDMs in the storage
subsystem. Read the software documentation and this entire section to determine if
you should use this procedure, use a modified version of this procedure, or use a
different procedure that is provided by your operating system.
Note: Instructions that are provided with your software should supersede anything
stated in this document.
Attention: After you remove a E-DDM CRU, wait 70 seconds before replacing or
reseating the E-DDM CRU to allow it to properly spin down. Failure to do so may
cause undesired events.
The following are methods for upgrading E-DDMs:
v Replacing all the E-DDMs at the same time
This method requires that you back up the data on the affected E-DDMs and
then turn off the DS4700 Express storage subsystem.
Attention: Turn off the DS4700 Express storage subsystem before you turn off
the attached storage expansion enclosures.
After replacing all the E-DDMs, you must reconfigure the new E-DDMs and
restore data from backup. See the procedure in “Replacing all E-DDMs at the
This is the safest way to exchange E-DDMs without losing data. However, this
method might take a long time to complete because of the backup,
reconfiguration, and restoration processes. In addition, other users are not able
to use the storage subsystem (or any storage expansion enclosures attached to
the storage subsystem) until you finish the procedure. You must use this method
on RAID 0 logical drives.
v Replacing the E-DDMs one at a time
In this method, you manually fail each E-DDM, replace it, and wait for the system
to restore data to the new E-DDM before installing the next E-DDM. After you
install the new E-DDMs, you can configure them to make the additional drive
space available. See the procedure in “Replacing the E-DDMs one at a time” on
Using this method, you can replace the E-DDMs while the storage expansion
enclosures and the DS4700 Express are running, eliminating the down time that
is required if you replace all the E-DDMs at once. However, this method is more
risky because you can lose data if the drive restoration or storage subsystem
reconfiguration process fails. In addition, the reconstruction process might take a
long time. This method works only on redundant logical drives (RAID 1, 3, or 5).
You cannot use this method with any drives containing RAID 0 logical drives.
Consider backing up your data if you use this method. This safeguards your data
if the restoration and reconfiguration process fails or the new drive malfunctions.
The method you use depends on the following considerations:
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v Which method most closely matches the recommended drive upgrade procedure
that is provided in the operating system or the storage-management software
documentation.
v Which RAID level is used on the affected drives. (RAID 0 requires you to replace
all the E-DDMs at the same time.)
v How much downtime is acceptable as you swap the E-DDMs.
v The number of E-DDMs in an array. Replacing E-DDMs one at a time is better
suited for arrays consisting of 3 to 5 E-DDMs. If you have more than 10 E-DDMs
or arrays that are comprised of high capacity SATA E-DDMs, consider replacing
all E-DDMs at the same time.
v How much risk of losing data is acceptable. Because the array will be in a
degraded state during the RAID array reconstruction and copyback process as
result of replacing a drive in the array, any new E-DDM failure will cause the
array to fail (causing a loss of data availability and even a loss of data). The
duration of the reconstruction and copyback process can be quite long,
depending on the size of the RAID array.
v How extensive will the data be changed while the array is in a degraded state
during the RAID array reconstruction and copyback process as result of replacing
an E-DDM in the array. The more extensive the data changes, the more work
that will need to be performed to restore the data in the event that the array
failed because of an addition E-DDM failed while the array is in degraded state.
Replacing all E-DDMs at the same time
Use this procedure to replace all E-DDMs at the same time. You must use this
method if you are upgrading E-DDMs containing RAID 0 logical drives. All the data
currently on the E-DDMs is lost when you replace the E-DDMs; therefore, you must
back up all data that is currently on the E-DDMs. This procedure also requires you
to turn off the storage expansion enclosures and the DS4700 Express, which
makes the storage subsystem (and any attached storage expansion enclosures)
inaccessible to other users.
Attention: After you remove a E-DDM CRU, wait 70 seconds before replacing or
reseating the E-DDM CRU to allow it to properly spin down. Failure to do so may
cause undesired events.
To replace all the E-DDMs at the same time, perform the following steps:
1. Read the following information:
the paragraphs that discuss the differences between the two possible
upgrade procedures
v The information in your software documentation regarding E-DDM upgrades
and installation
v The documentation that comes with the new E-DDMs
Read all precautionary notes, kit instructions, and other information. Kit
instructions often contain the most current information regarding the
E-DDMs and their installation, plus upgrade or servicing procedures.
Compare the kit instructions with this procedure to determine if you need to
modify this procedure.
2. Use the DS4000 Storage Manager software to check the status of the DS4700
Express. Correct any problems that are reported.
3. Perform a complete backup of the E-DDMs that you are replacing.
You need the backup to restore data on the E-DDMs later in this procedure.
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Attention: When you handle static-sensitive devices, take precautions to
avoid damage from static electricity. For details about handling static-sensitive
devices, see “Handling static-sensitive devices” on page 33.
4. Unpack the new E-DDMs.
Set the E-DDMs on a dry, level surface away from magnetic fields. Save the
packing material and documentation in case you need to return them.
5. Perform the following steps:
a. Stop all I/O activity to the storage subsystem and attached storage
expansion enclosures. Make sure of the following:
1) All of the green Drive activity LEDs on the front of the storage
subsystem (and on all attached storage expansion enclosures) are not
flashing.
2) The green Cache active LEDs are off. Refer to the IBM System
Storage DS4700 Storage Subsystem Installation, User's, and
Maintenance Guide for the location of the Cache active LEDs.
b. If applicable, use the operating system software to disconnect the storage
subsystem logical drives from the host before you power off the storage
subsystem.
Attention: To turn off all power to the storage subsystem, you must turn off
both power supply and fan unit switches and disconnect both power cords.
6. Turn off the power to each device based on the following shutdown sequence:
a. Turn off power to the host before you turn off power to the storage
subsystem. If the host must stay powered on to support an existing
network, see the operating system documentation for information about
disconnecting the storage subsystem logical drives from the host before
the storage subsystem is powered off.
b. Turn off power to the storage subsystem before you turn off power to the
storage expansion enclosures. Turn off both power supply switches on the
back of the storage subsystem.
CAUTION:
The power switch on the power supply and fan unit does not turn off
the electrical current supplied to the device. The DS4700 Express
Storage Subsystem might also have more than one connection to dc
power. To remove all electrical current from the device, ensure that all
dc power cords are disconnected from the power supply and fan unit
dc input connectors.
c. Turn off power to other supporting devices (for example, management
stations, fibre-channel switches, or Ethernet switches).
the E-DDMs that you want to replace. Use the procedures in “Installing
hot-swap E-DDMs” on page 153 to install the new E-DDMs into the storage
subsystem.
8. After you install all the new E-DDMs, check the system documentation for the
hardware devices that you intend to power up, and then determine the proper
startup sequence. Use the following power-on sequence, where applicable:
a. Turn on the power to the supporting devices (for example, Ethernet
switches and management stations) before you turn off power to the
storage subsystem.
b. You must turn on the storage expansion enclosures before the storage
subsystem. The controllers might not recognize the correct configuration if
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the E-DDMs are powered up after the storage subsystem. For instructions
on powering up the storage subsystem, see the storage subsystem
documentation.
c. Turn on the power to the storage subsystem; then restart or turn on the
power to the host.
expansion enclosures, turn on the power supply and fan unit switches on the
back of the storage subsystem. You must turn on both power supply and fan
unit switches to take advantage of the redundant power supplies.
10. Check the green Drive activity LEDs and the amber Drive fault LEDs above
the new E-DDM CRUs.
Make sure that the Drive activity LEDs are on and the Drive fault LEDs are off.
Note: The Drive fault LEDs might flash intermittently while the E-DDMs spin
up.
v If the Drive activity LED is off, the E-DDM CRU might not be installed
correctly. Remove the E-DDM CRU, wait 30 seconds, and then reinstall it.
v If the Drive fault LED stays on or the Drive activity LED stays off, the new
E-DDM might be faulty. See the DS4000 Storage Manager software for
problem determination.
11. Use the DS4000 Storage Manager software to configure the new E-DDMs.
See the DS4000 Storage Manager software online Help for detailed
instructions.
12. Restore the data from backup to all the E-DDMs.
Replacing the E-DDMs one at a time
Use this procedure to replace all the E-DDMs one at a time. You cannot use this
procedure on RAID 0 logical drives (use the procedure in “Replacing all E-DDMs at
Note: If your storage subsystem has hot spares assigned, you might want to
unassign the hot spares while you perform this procedure. If you do not,
reconstruction might start on the hot spare before you insert the new
E-DDM. The data on the new E-DDM is still rebuilt, but the process takes
longer for each E-DDM. Remember to reassign the hot spares when you are
finished with this procedure.
Attention: After you remove an E-DDM CRU, wait 70 seconds before replacing or
reseating the E-DDM CRU to allow it to properly spin down. Failure to do so may
cause undesired events.
To replace the E-DDMs one at a time, perform the following steps:
1. Read the following information:
discuss the differences between the two possible upgrade procedures
v Your software documentation regarding E-DDM upgrades and installation
v The documentation that comes with the new E-DDMs
Read all precautionary notes, kit instructions, and other information. Kit
instructions often contain the most current information regarding the
E-DDMs and their installation, plus upgrade or servicing procedures.
Compare the kit instructions with this procedure to determine if you need to
modify this procedure.
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2. Use the DS4000 Storage Manager software to check the status of the unit.
Correct any problems that are reported.
3. Back up the data in the arrays and logical drives that are configured using the
E-DDMs that you are replacing.
Attention: When you handle static-sensitive devices, take precautions to
avoid damage from static electricity. For details about handling static-sensitive
devices, see “Handling static-sensitive devices” on page 33.
4. Unpack the new E-DDMs.
Set the E-DDMs on a dry, level surface away from magnetic fields. Save the
packing material and documentation in case you need to return the E-DDMs.
5. Use the DS4000 Storage Manager software to ensure that the array that was
defined using these E-DDMs is in optimal (not degraded) state before manually
failing the first E-DDM you want to replace. If the array is in degraded state,
use the recovery procedures to bring the array into the optimal state.
Make sure of the following:
v You fail only one E-DDM.
v The software status display shows a failed status for the appropriate
E-DDM.
v The amber Drive fault LED (on the front bezel below the E-DDM) is on.
Attention: Removing the wrong E-DDM can cause data loss. Make sure that
you remove only the failed E-DDM CRU. The Drive fault LED below the failed
E-DDM CRU should be on.
If you remove an active E-DDM accidentally, wait at least 30 seconds and then
reinstall it. Because you failed two E-DDMs in a RAID array, the array might be
marked failed by the controller. This array will not be available to the host for
I/O. See the DS4000 Storage Manager software for further recovery
instructions. Do not attempt to replace any E-DDMs until the array is brought
back to optimal state.
the failed E-DDM. Use the procedures in “Installing hot-swap E-DDMs” on
page 153 to install the new E-DDMs into the storage subsystem.
The new E-DDM automatically reconstructs the data after you install it in the
drive slot.
During data reconstruction, the amber Drive fault LED might come on for a few
minutes, then turn off when the green Drive activity LED begins flashing. A
flashing Drive activity LED indicates that data reconstruction is in progress.
Note: If your storage subsystem has active hot spares, data might not start
copying to the new E-DDM until the data is reconstructed on the hot
spare. This increases the time that is required to complete the
procedure.
7. Check the green Drive activity LED and the amber Drive fault LED above the
new E-DDM CRUs.
Make sure that the Drive activity LEDs are on and the Drive fault LEDs are off.
Note: The Drive fault LEDs might flash intermittently while the E-DDMs spin
up.
v If the Drive activity LED is off, the E-DDM CRU might not be installed
correctly. Remove the E-DDM CRU, wait 30 seconds, and then reinstall it.
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v If the Drive fault LED stays on or the Drive activity LED stays off, the new
E-DDM might be faulty or might be an uncertified drive. See the DS4000
Storage Manager software for problem determination. In the case of an
uncertified drive, verify that the drive options or drive FRU part number is
correct for your storage subsystem.
8. Use the DS4000 Storage Manager software to monitor the status of the new
E-DDM and the progress of the data reconstruction. Wait for data
reconstruction to finish (the Drive activity LED stops flashing).
Note: The Drive activity LED will continue to flash after reconstruction is
finished if there is I/O activity to that E-DDM. In that case, use the host
software to determine if the data reconstruction is finished.
10. Use the DS4000 Storage Manager software to configure the additional space
on the new E-DDMs.
Verifying the Link Rate setting
If a link rate problem is indicated, use the following procedure to verify the Link
Rate setting.
A Link Rate switch is located on the front of the storage subsystem as shown in
Figure 113 on page 163. The Link Rate indicator LEDs are located on the back of
the storage subsystem. The Link Rate switch enables you to select the data
transfer rate between the controllers and the drives to either 2 Gbps or 4 Gbps. The
Link Rate switch is only read when the storage subsystem is powered up.
Note: Do not mix storage subsystems with different Link Rate speed settings in the
same drive loop.
The DS4700 Express Storage Subsystem drive channel operates at either 2 or 4
Gbps fibre channel interface speed. The DS4700 Express Storage Subsystem
SATA E-DDM CRUs have an ATA translator card that converts E-DDM 3 Gbps
SATA drive interface protocol to either 2 Gbps or 4 Gbps fibre channel interface
protocol. It is recommended that the DS4700 Express enclosure speed is set at 4
Gbps when these SATA E-DDM CRUs are installed and connected to storage
expansion enclosures running at 4 Gbps speed. The Link Rate setting speed must
Do not mix 2 GB drives and 4 GB drives in the same storage subsystem. If drives
of mixed speeds reside in the storage subsystem, the data transfer rate changes
for drives of different configurations.
CAUTION:
Do not change the Link Rate setting while the storage subsystem is running.
Changing the Link Rate setting while the storage subsystem is running could
cause drives to fail. You must power down the storage subsystem and
storage expansion enclosures before changing the Link Rate setting.
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Attention: All devices on the loop must have the same data transfer rate, which
means that you must set the link rate on the storage expansion enclosure to the
same rate as the storage subsystem to which it is connected. Information about
supported DS4000 storage subsystems can be obtained from the certified
Compatibility Matrix, which can be found at the following Internet location:
Table 50. Data transfer rates for drive modules
Link Rate
Switch
Setting
Storage Subsystem
with 2 GB Drives
Storage Subsystem with Storage Subsystem with
4 GB Drives
Mixed Drives
2 Gbps
Drives function in 2
Gbps mode.
Drives work in 2 Gbps
mode.
All drives work in 2 Gbps
mode.
4 Gbps
Drives do not come
online.
Drives work in 4 Gbps
mode.
2 GB drives do not come
online.
4 GB drives work in 4 Gbps
mode.
Use the following procedure to check the current setting of the data transfer rate
and change it, if necessary:
subsystem” on page 134 ensuring that the DS4000 storage subsystem is
turned off before any attached storage expansion enclosures.
location of the Link Rate indicator lights on the back of the storage subsystem.
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Link
Rate
LEDs
Two on = 4 Gbps
One on = 2 Gbps
Figure 112. Link rate LEDs
If both Link Rate indicator LEDs are on, the data transfer rate is set for 4
Gbps. If one Link Rate indicator light is on, the data transfer rate is set for 2
Gbps.
3. Is the data transfer rate set correctly?
Attention: When you handle static-sensitive devices, take precautions to
avoid damage from static electricity. For details about handling static-sensitive
devices, see “Handling static-sensitive devices” on page 33.
indicator light on the front of the command module.
77025-01
Link Rate switch
(2 Gbps or 4 Gbps)
Figure 113. Link rate switch
5. Change the Link Rate switch setting by doing the following:
a. Put on antistatic protection.
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b. Use a small screwdriver or the tip of a ball point pen to slide the Link Rate
switch to the left or right to set the desired fibre channel operating speed.
Attention: Although the Link Rate LED indicates the correct speed
setting, the link rate speed does not change until after you cycle power to
the storage subsystem.
subsystems in the configuration.
8. Check the indicator lights on the front and back of all of the storage subsystem
and expansion drive modules. All the green indicator LEDs should be on, and
the amber indicator LEDs should be off. (No LEDs are displayed on blank
drives.)
9. Are only the green indicator LEDs on?
v Yes - The drive is working correctly.
10. Diagnose and correct the fault.
a. To run the Recovery Guru, select the Recovery Guru toolbar button in the
Subsystem Management window.
b. Complete the recovery procedure.
c. When the procedure is completed, rerun the Recovery Guru to ensure that
the problem has been corrected by selecting Recheck in the Recovery
Guru.
11. If the problem persists, contact IBM Customer and Technical Support.
Replacing an ac power supply and fan unit
Statement 5:
CAUTION:
The power control button on the device and the power switch on the power
supply do not turn off the electrical current supplied to the device. The device
also might have more than one power cord. To remove all electrical current
from the device, ensure that all power cords are disconnected from the power
source.
2
1
CAUTION:
Disconnect the power cord before replacing the power supply and fan unit.
The power supply and fan unit is a component that includes both a 600-W power
supply unit and two fans. The power supply and fan units provide power and
cooling for the DS4700 Express. The power supply and fan units are customer
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replaceable units (CRUs) and do not require preventive maintenance. Use only the
supported power supply and fan units for your specific storage subsystem.
Each power supply and fan unit has a built-in sensor that detects the following
conditions:
v Over-voltage
v Over-current
v Overheated power supply
If any of these conditions occurs, one or both power supplies will shut down. If the
power remains off after the condition that causes it to go off, make sure that the
environment is optimal (no overheating has occurred, all electrical outlets are
working, and so on). For more information, see “Restoring power after an
The storage subsystem cooling system consists of two fans in each of the two
power supply and fan unit CRUs. The power supply and fan units circulate air from
the front to the back of the unit.
If both power supply and fan units fail, or if the power supply and fan units cannot
maintain an internal temperature below 68° C (154° F), the power supply and fan
units in the unit will automatically shut down (an over-temperature condition). If this
occurs, you must cool the unit and restart it. See “Restoring power after an
Attention: The fans in the power supply and fan units draw in fresh air and force
out hot air. The power supply and fan units are hot-swappable and redundant;
however, if the fans in one power supply and fan unit fail, you must replace the
entire failed power supply and fan unit within 72 hours to maintain redundancy and
optimum cooling. Do not remove the failed power supply and fan unit until you have
the replacement power supply and fan unit. When you do remove the failed power
supply and fan unit, be sure to install the second power supply and fan unit within
10 minutes to prevent any overheating due to the interruption to the air flow that
cools the storage subsystem.
Do not run the storage subsystem without adequate ventilation and cooling,
because it might cause damage to the internal components and circuitry.
Use the following procedure to replace an ac power supply and fan unit. Figure 114
on page 168 illustrates removing and inserting a unit.
Attention: Potential damage to a component - To prevent damage from
overheating, replace a failed power supply and fan unit CRU within 15 minutes of
removal. If replacing it will take longer than 15 minutes, stop all I/O activity to the
storage subsystem and turn off the power until you complete the replacement.
Statement 8:
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CAUTION:
Never remove the cover on a power supply and fan unit or any part that has
the following label attached.
Hazardous voltage, current, and energy levels are present inside any
component that has this label attached. There are no serviceable parts inside
these components. If you suspect a problem with one of these parts, contact
a service technician.
1. If needed, use the DS4000 Storage Manager client software to print a storage
system profile.
2. Did the Recovery Guru direct you to replace a failed power supply and fan
unit?
v No - Run the Recovery Guru to identify the failed component, and then go
to step 3.
3. Put on antistatic protection.
4. Unpack the new power supply and fan unit. Save all packing material in case
you need to return the failed power supply and fan unit CRU.
Note: The new power supply and fan unit CRU comes with an instruction
sheet and label sheet. The instruction sheet provides instructions on
placing the appropriate labels on the power supply and fan unit CRU to
mark the LEDs correctly. The label sheet contains the peel-off labels
that you actually place on the power supply and fan unit CRU.
5. Using the information provided on the instruction sheet, place the labels on the
power supply and fan unit CRU to correctly mark the LEDs.
6. Turn off the power switch on the new unit.
7. Check the Fault LED to locate the failed power supply and fan unit. If a fault is
detected, the amber Fault LED is on.
8. Verify that the Service Action Allowed LED is on. Do not remove the power
supply and fan unit if the LED is off. For more information on the Service
Action Allowed LED, see “Service Action Allowed Status LED” on page 145.
Statement 1:
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DANGER
Electrical current from power, telephone, and communication cables is
hazardous.
To avoid a shock hazard:
v Do not connect or disconnect any cables or perform installation,
maintenance, or reconfiguration of this product during an electrical
storm.
v Connect all power cords to a properly wired and grounded electrical
outlet.
v Connect to properly wired outlets any equipment that will be
attached to this product.
v When possible, use one hand only to connect or disconnect signal
cables.
v Never turn on any equipment when there is evidence of fire, water,
or structural damage.
v Disconnect the attached power cords, telecommunications systems,
networks, and modems before you open the device covers, unless
instructed otherwise in the installation and configuration
procedures.
v Connect and disconnect cables as described in the following table
when installing, moving, or opening covers on this product or
attached devices.
To Connect:
To Disconnect:
1. Turn everything OFF.
1. Turn everything OFF.
2. First, attach all cables to devices.
3. Attach signal cables to connectors.
4. Attach power cords to outlet.
5. Turn device ON.
2. First, remove power cords from outlet.
3. Remove signal cables from connectors.
4. Remove all cables from devices.
9. Turn off the power switch, and unplug the power cord from the failed power
supply and fan unit.
10. Squeeze the latch and pull the lever open 90° (so that the lever is horizontal)
to release the power supply and fan unit from the latch. The latch is a coral
colored tab on the lever.
11. Slowly pull the lever away from the chassis to remove the power supply and
fan unit, as shown in Figure 114 on page 168.
Note: The lever rotates upward or downward 90°, depending on whether the
power supply and fan unit you are removing is in the right or left power
supply and fan unit bay.
12. Slide the new unit into the empty slot. As you slide the power supply and fan
unit into the empty slot, make sure the guide pins on the side of the power
supply and fan unit fit into the notches. After the guide pins fit into the notches
and power supply and fan unit fits snugly into the slot, push the lever
downward or upward 90° to fully latch the power supply and fan unit into place,
depending on whether you are inserting the power supply and fan unit into the
right or left power supply and fan unit bay. Then gently push the front of the
power supply and fan unit to ensure that it is fully seated.
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Attention: The left and right power supply and fan units are seated in the
DS4700 Express chassis in opposite orientations. If you cannot fully insert the
power supply and fan unit into the power supply and fan unit bay, flip it 180°
and reinsert it. Make sure that the levers lock into place in the storage
subsystem chassis. Do not force fit. The power supply and fan unit is designed
to prevent it from being inserted into the chassis incorrectly.
13. Plug in the power cord and turn on the power.
14. Check the Power and Fault LEDs on the new unit.
Lever
Figure 114. Replacing a power supply and fan unit
15. Based on the status of the Power and Fault LEDs, choose one of the following
steps:
v Fault LED is on and ac and dc power LED are off - The new unit might
be installed incorrectly. The power supply and fan unit switch may not be
turned on. The power cord plug may not be fully inserted into the power
outlet or the power supply and fan unit ac socket. There is not any power to
the outlet that the power supply-unit is connected to. The power cord may
be faulty. Go to step 16.
v Fault and ac power LED are on but the dc power LED is off - The power
supply and fan unit is faulty. Turn the power supply and fan unit power
switch to off and contact IBM Customer and Technical Support for another
power supply and fan unit.
16. Perform the following task or task(s) to resolve the problem:
v Ensure that the power switch is turned to the on position.
v Ensure that there is power at the ac outlet and no circuit breaker has
tripped.
v Ensure that the power cord is working and fully seated into the electrical
outlet and the power supply and fan unit ac socket.
v Reinstall the power supply and fan unit.
If the above tasks do not resolve the problem, contact IBM Customer and
Technical Support
17. Complete any remaining Recovery Guru procedures, if needed.
18. Check the status of each component in the storage subsystem.
19. Do any components have a Needs Attention LED?
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v Yes - Select the Recovery Guru toolbar button in the Subsystem
Management window and complete the recovery procedure. If a problem is
still indicated, contact IBM Customer and Technical Support.
20. Create, save, and print a new storage subsystem profile.
Replacing a dc power supply and fan unit
CAUTION:
This unit has more than one power source. To remove all power from the unit,
all dc MAINS must be disconnected.
Statement 29:
CAUTION:
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment.
This equipment is designed to permit the connection of the earthed conductor
of the dc supply circuit to the earthing conductor at the equipment. If this
connection is made, all of the following conditions must be met:
v This equipment shall be connected directly to the dc supply system
earthing electrode conductor or to a bonding jumper from an earthing
terminal bar or bus to which the dc supply system earthing electrode
conductor is connected.
v This equipment shall be located in the same immediate area (such as,
adjacent cabinets) as any other equipment that has a connection between
the earthed conductor of the same dc supply circuit and the earthing
conductor, and also the point of earthing of the dc system. The dc system
shall not be earthed elsewhere.
v The dc supply source shall be located within the same premises as this
equipment.
v Switching or disconnecting devices shall not be in the earthed circuit
conductor between the dc source and the point of connection of the
earthing electrode conductor.
Statement 30:
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CAUTION:
To reduce the risk of electric shock or energy hazards:
v This equipment must be installed by trained service personnel in a
restricted-access location, as defined by the NEC and IEC 60950-1, First
Edition, The Standard for Safety of Information Technology Equipment.
v Connect the equipment to a reliably grounded safety extra low voltage
(SELV) source. An SELV source is a secondary circuit that is designed so
that normal and single fault conditions do not cause the voltages to exceed
a safe level (60 V direct current).
v The branch circuit overcurrent protection must be rated 20 A.
v Use 12 American Wire Gauge (AWG) or 2.5 mm2 copper conductor only, not
exceeding 4.5 meters in length.
v Incorporate a readily available approved and rated disconnect device in the
field wiring.
CAUTION:
Disconnect the dc power jumper cord from the dc connector on the dc power
supply and fan unit before replacing the dc power supply and fan unit.
The dc power supply and fan unit is a component that includes both a -48 V power
supply unit and two fans. The dc power supplies provide power and cooling for the
DS4700 Express. The dc power supplies are customer replaceable units (CRUs)
and do not require preventive maintenance. Use only the supported dc power
supplies for your specific storage subsystem.
Each dc power supply and fan unit has a built-in sensor that detects the following
conditions:
v Over-voltage
v Over-current
v Overheated power supply
If any of these conditions occurs, one or both power supplies will shut down. If the
power remains off after the condition that causes it to go off, make sure that the
environment is optimal (no overheating has occurred, all electrical outlets are
working, and so on). For more information, see “Restoring power after an
The storage subsystem cooling system consists of two fans in each of the two dc
power supply and fan unit CRUs. The dc power supplies circulate air from the front
to the back of the unit.
If both dc power supplies fail, or if the dc power supplies cannot maintain an
internal temperature below 68° C (154° F), the dc power supplies in the unit will
automatically shut down (an over-temperature condition). If this occurs, you must
cool the unit and restart it. See “Restoring power after an unexpected shutdown” on
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Attention: The fans in the dc power supplies draw in fresh air and force out hot
air. The dc power supplies are hot-swappable and redundant; however, if the fans in
one dc power supply and fan unit fail, you must replace the entire failed dc power
supply and fan unit within 72 hours to maintain redundancy and optimum cooling.
Do not remove the failed dc power supply and fan unit until you have the
replacement dc power supply and fan unit. When you do remove the failed dc
power supply and fan unit, be sure to install the second dc power supply and fan
unit within 10 minutes to prevent any overheating due to the interruption to the air
flow that cools the storage subsystem.
Do not run the storage subsystem without adequate ventilation and cooling,
because it might cause damage to the internal components and circuitry.
Use the following procedure to replace a dc power supply and fan unit. Figure 114
on page 168 illustrates removing and inserting a unit.
Attention: Potential damage to a component - To prevent damage from
overheating, replace a failed dc power supply and fan unit CRU within 15 minutes
of removal. If replacing it will take longer than 15 minutes, stop all I/O activity to the
storage subsystem and turn off the power until you complete the replacement.
Statement 8:
CAUTION:
Never remove the cover on a dc power supply and fan unit or any part that
has the following label attached.
Hazardous voltage, current, and energy levels are present inside any
component that has this label attached. There are no serviceable parts inside
these components. If you suspect a problem with one of these parts, contact
a service technician.
1. If needed, use the DS4000 Storage Manager client software to print a storage
system profile.
2. Did the Recovery Guru direct you to replace a failed dc power supply and fan
unit?
v No - Run the Recovery Guru to identify the failed component, and then go
to step 3.
3. Put on antistatic protection.
4. Unpack the new dc power supply and fan unit. Save all packing material in
case you need to return the failed dc power supply and fan unit CRU.
Note: The new dc power supply and fan unit CRU comes with an instruction
sheet and label sheet. The instruction sheet provides instructions on
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placing the appropriate labels on the dc power supply and fan unit CRU
to mark the LEDs correctly. The label sheet contains the peel-off labels
that you actually place on the dc power supply and fan unit CRU.
5. Using the information provided on the instruction sheet, place the labels on the
dc power supply and fan unit CRU to correctly mark the LEDs.
6. Turn off the power switch on the new unit.
7. Check the Fault LED to locate the failed dc power supply and fan unit. If a
fault is detected, the amber Fault LED is on.
8. Verify that the Service Action Allowed LED is on. Do not remove the dc power
supply and fan unit if the LED is off. For more information on the Service
Action Allowed LED, see “Service Action Allowed Status LED” on page 145.
Statement 1:
DANGER
Electrical current from power, telephone, and communication cables is
hazardous.
To avoid a shock hazard:
v Do not connect or disconnect any cables or perform installation,
maintenance, or reconfiguration of this product during an electrical
storm.
v Connect all power cords to a properly wired and grounded electrical
outlet.
v Connect to properly wired outlets any equipment that will be
attached to this product.
v When possible, use one hand only to connect or disconnect signal
cables.
v Never turn on any equipment when there is evidence of fire, water,
or structural damage.
v Disconnect the attached power cords, telecommunications systems,
networks, and modems before you open the device covers, unless
instructed otherwise in the installation and configuration
procedures.
v Connect and disconnect cables as described in the following table
when installing, moving, or opening covers on this product or
attached devices.
To Connect:
To Disconnect:
1. Turn everything OFF.
1. Turn everything OFF.
2. First, attach all cables to devices.
3. Attach signal cables to connectors.
4. Attach power cords to power source.
5. Turn device ON.
2. First, remove power cords from power
source.
3. Remove signal cables from connectors.
4. Remove all cables from devices.
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9. Turn off the dc power supply switch, set disconnect devices to the OFF
position, and then unplug the power cord from the failed dc power supply and
fan unit.
Attention:
a. IBM recommends that you use the disconnect device to remove power
before disconnecting the dc power cord.
b. The power switch on the dc power supply and fan unit does not turn off the
electrical current supplied to the device. The DS4700 Express Storage
Subsystem power supply and fan unit might also have more than one
connection to dc power. To remove all electrical current from the device,
ensure that all dc power cords are disconnected from the power supply
and fan unit dc input connectors.
10. Squeeze the latch and pull the lever open 90° (so that the lever is horizontal)
to release the dc power supply and fan unit from the latch. The latch is a coral
colored tab on the lever.
11. Slowly pull the lever away from the chassis to remove the dc power supply and
fan unit, as shown in Figure 115 on page 174.
Note: The lever rotates upward or downward 90°, depending on whether the
dc power supply and fan unit you are removing is in the right or left dc
power supply and fan unit bay.
12. Slide the new unit into the empty slot. As you slide the dc power supply and
fan unit into the empty slot, make sure the guide pins on the side of the dc
power supply and fan unit fit into the notches. After the guide pins fit into the
notches and dc power supply and fan unit fits snugly into the slot, push the
lever downward or upward 90° to fully latch the dc power supply and fan unit
into place, depending on whether you are inserting the dc power supply and
fan unit into the right or left dc power supply and fan unit bay. Then gently
push the front of the dc power supply and fan unit to ensure that it is fully
seated.
Attention: The left and right dc power supplies are seated in the DS4700
Express chassis in opposite orientations. If you cannot fully insert the dc power
supply and fan unit into the dc power supply and fan unit bay, flip it 180° and
reinsert it. Make sure that the levers lock into place in the storage subsystem
chassis. Do not force fit. The dc power supply and fan unit is designed to
prevent it from being inserted into the chassis incorrectly.
13. Plug in the power cord, turn on any attached disconnect devices, and turn on
the power to the dc power supply and fan unit.
14. Check the Power and Fault LEDs on the new unit.
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Figure 115. Replacing a dc power supply and fan unit
15. Based on the status of the Power and Fault LEDs, choose one of the following
steps:
v Fault LED is on and dc power LED are off - The new unit might be
installed incorrectly. The dc power supply and fan unit switch may not be
turned on. The power cord plug may not be fully inserted into the power
source or the power supply and fan unit dc socket. There is not any power
to the power source that the power supply-unit is connected to. The
disconnect device might be in the OFF position. The power cord may be
faulty. Go to step 16.
v Fault LED and dc power supply and fan unit LED are on but the dc
power LED is off - The dc power supply and fan unit is faulty. Turn the dc
power supply and fan unit power switch to off and contact IBM Customer
and Technical Support for another dc power supply and fan unit.
v dc power supply and fan unit LED and dc Power LED are on and Fault
16. Perform the following task or task(s) to resolve the problem:
v Ensure the disconnect device is set to the ON position.
v Ensure that the power switch is turned to the ON position.
v Ensure that there is power at the power source and no circuit breaker has
tripped.
v Ensure that the power cord is working and fully seated into the power
source and the dc power supply and fan unit ac socket.
v Reinstall the dc power supply and fan unit.
If the above tasks do not resolve the problem, contact IBM Customer and
Technical Support
17. Complete any remaining Recovery Guru procedures, if needed.
18. Check the status of each component in the storage subsystem.
19. Do any components have a Needs Attention LED?
v Yes - Select the Recovery Guru toolbar button in the Subsystem
Management window and complete the recovery procedure. If a problem is
still indicated, contact IBM Customer and Technical Support.
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20. Create, save, and print a new storage subsystem profile.
Replacing a battery unit
Each RAID controller in the DS4700 Express Storage Subsystem contains a
rechargeable battery unit that maintains data in the cache memory for three days
without power to the unit.
Use the following procedure if the DS4000 Storage Manager client instructs you to
replace the battery unit because the current battery has failed. You can also use the
DS4000 Storage Manager client to check the status of the battery. Because
write-caching is disabled when either one of the battery units fail, IBM recommends
that you replace the failed battery unit as soon as possible to minimize any impact
due to the disabling of the write-caching function.
Replace only the battery unit that is indicated as failed by the LEDs. You do not
need to replace both battery units when the Battery LEDs indicate that only one
battery unit has failed.
Note: Unlike the batteries for other DS4000 Storage Subsystems, the DS4700
Express Storage Subsystem battery units do not have set expiration dates.
Do not replace these batteries after a certain usage period.
Attention: When you handle static-sensitive devices, take precautions to avoid
damage from static electricity. For details about handling static-sensitive devices,
Use the following procedure to replace a battery unit.
1. Use the DS4000 Storage Manager client software to print a storage subsystem
profile.
2. Locate the RAID controller that contains the failed battery unit.
3. Check the LEDs on the battery units to determine which of the two battery units
that is indicated as failed by the LEDs.
4. Put on antistatic protection.
5. To remove the failed battery unit from the RAID controller, press the battery unit
latch (the coral colored tabꢀ3ꢁ) toward the black colored battery pull handle
(ꢀ4ꢁ) to unlatch the battery from the DS4700 Express chassis and slowly pull
the battery unit from the controller chassis using the black handle, as shown in
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3
4
1
2
Figure 116. Removing and replacing a battery unit from the controller chassis
Attention: This product contains a sealed Lithium Ion battery. Discharged
Lithium and Lithium Ion batteries are currently designated to be disposed of in
normal trash. However, users should contact their municipal waste disposal
facility prior to discarding any used battery in normal trash. Alternatively, IBM
recommends users may return Lithium, Lithium Ion and Lithium Ion battery
packs to IBM for recycling.
In the United States, IBM has established a collection process for reuse,
recycling, or proper disposal of used IBM Lithium, Lithium Ion and Lithium Ion
battery packs. For information on proper disposal of these batteries, please
contact IBM at 1-800-426-4333. Please have the IBM part number listed on the
battery available prior to your call.
For information on disposal of sealed Lithium Ion batteries outside the United
contact your local waste disposal facility.
6. Place the battery unit that you removed on a level surface.
7. Unpack the new battery unit. Set the new battery unit on a dry, level surface.
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Save all packing materials in the event you need to return the new battery unit.
8. Insert the new battery unit into the controller chassis. Make sure the new battery
unit is inserted in the correct orientation in the battery unit bay. Press the battery
unit fully into the bay until it clicks into place. Do not force fit. The battery unit is
designed to prevent it from being inserted into the chassis incorrectly.
Note: The green Battery Charging LED flashes until the battery is fully charged.
9. Reset the battery age in the DS4000 Subsystem Management window. Refer to
the online help for instructions on how to reset the battery age, if required.
Replacing an SFP module
The speed of the SFP module determines the maximum operating speed of the
fibre channel port in which the SFP is installed. For example, a 2-Gbps SFP that is
plugged into a 4-Gbps-capable port will limit the speed of that port to a maximum of
2 Gbps.
Attention: Refer to the FRU option P/N on the SFP to identify the maximum
operating speed of the SFP and to request the correct FRU replacement.
Use the following procedure to replace a Small Form-factor Pluggable (SFP)
module on the storage subsystem. The SFP module shown in this procedure might
look different from those you are using, but the difference will not affect functionality.
Figure 117 on page 178 illustrates installing an SFP module.
Electrostatic discharge can damage sensitive components. To prevent electrostatic
discharge damage to the storage subsystem, use proper antistatic protection when
handling components.
To replace an SFP module, do the following:
1. Use the DS4000 Storage Manager client software to print a new storage
subsystem profile.
2. Using the Recovery Guru, identify the failed component that needs to be
replaced.
3. Check the Fault LEDs to locate the failed SFP module. If a fault is detected,
the amber Fault LED is on.
Attention: Potential loss of data access - To prevent loss of access to
data, remove only the SFP module that has a failed status in the storage
management software and has Port Bypass LED lit.
4. Put on antistatic protection.
5. Unpack the new SFP module. Verify that it is the same type of module you are
replacing. If it is not, contact IBM Customer and Technical Support.
Attention: The speed of the SFP module determines the maximum operating
speed of the fibre channel port in which the SFP is installed. For example, a
2-Gbps SFP that is plugged into a 4-Gbps-capable port will limit the speed of
that port to a maximum of 2 Gbps.
Attention: Handle and install fiber-optic cables properly to avoid degraded
performance or loss of communications with devices. For specific handling
guidelines, see “Handling fibre-optic cables” on page 57.
6. Disconnect the interface cables from the SFP module.
7. Remove the failed SFP module from the controller.
8. Install the new SFP module into the controller.
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9. Reconnect the interface cable.
ESM Fault Light
ESM
SFP
Transceiver
Fiber-optic cable
(Host interface cable)
Figure 117. Replacing an SFP module
10. Check the Bypass and Fault LEDs for the new SFP module.
11. Based on the status of the Bypass and Fault LEDs, choose one of the
following steps:
v Bypass LED or Fault LED is on - Reinstall the SFP module and cables,
and verify that the SFP module and cables are securely connected. Use the
fibre channel loopback and the LC-LC connector to perform path diagnostics
to ensure that the FC cable is good and the SFP on the other end of the
fibre channel connection is working properly. When finished, go to step 12.
12. Is the problem corrected?
v No - Contact IBM Support.
13. Complete any remaining Recovery Guru procedures, if needed.
14. Use the DS4000 Storage Manager Subsystem Management window to check
the status the status of all components in the storage subsystem.
15. Remove the antistatic protection.
16. Does any component have a Needs Attention status?
v Yes - Select the Recovery Guru toolbar button in the Subsystem
Management window, and complete the recovery procedure. If the problem
persists, contact IBM Support.
17. Use the DS4000 Storage Manager client software to print a new storage
subsystem profile.
Replacing a midplane
Attention: Observe handling static-sensitive device precautions stated in
“Handling static-sensitive devices” on page 33 when removing components.
Perform the following steps to replace a midplane:
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subsystem” on page 134 ensuring that the DS4000 storage subsystem is
turned off before any attached storage expansion enclosures.
Attention:
a. The power switch on the power supply and fan unit does not turn off the
electrical current supplied to the device. The DS4700 Express Storage
Subsystem might also have more than one connection to dc power. To
remove all electrical current from the device, ensure that all dc power cords
are disconnected from the power supply and fan unit dc input connectors.
b. For a DS4700 Express Storage Subsystem with dc power supply and fan
units only, turn off all of the attached disconnect devices. IBM recommends
that you use the disconnect device to remove power before disconnecting
the dc power cord.
2. Label and remove the power cords from the power supply and fan units of the
DS4700 Express Storage Subsystem.
3. Label the fibre channel cables that are attached to the rear of the controllers.
Labeling the cables simplifies the re-cabling process.
4. Remove the fibre channel cables that are attached to the rear of the
controllers.
5. Remove both controllers. To remove them do the following:
a. Squeeze the controller latch and pull the lever open 90° (so that the lever
is horizontal) to release the controller from the latch. The controller latch is
a coral colored tab on the lever.
Note: The lever rotates upward or downward 90°, depending on whether
the controller you are removing is the right or left controller CRU.
b. Slowly pull the lever away from the storage subsystem chassis to remove
the controller from the controller bay, as shown in Figure 21 on page 42.
(Remove the controllers from the chassis and place it on electrostatic
discharge (ESD) protected surface.)
6. Remove both power supply and fan units. To remove them, do the following:
a. Squeeze the latch and pull the lever open 90° (so that the lever is
horizontal) to release the power supply and fan unit from the latch. The
latch is a coral colored tab on the lever.
b. Slowly pull the lever away from the chassis to remove the power supply
supply and fan unit from the chassis and place it on ESD protected
surface.)
Note: The lever rotates upward or downward 90°, depending on whether
the power supply and fan unit you are removing is in the right or left
power supply and fan unit bay.
on page 150 for instructions.
8. Label the Enhanced Disk Drive Module (E-DDM) CRUs so you know their
physical location in the midplane.
9. Remove the E-DDM CRUs and any blank drive CRUs if the storage subsystem
E-DDMs on ESD protected surface.
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Attention: Do not stack E-DDM CRUs on top of each other. Protect the
E-DDM CRUs from vibrations or sudden shocks.
10. Use a #1 Phillips screwdriver to loosen the four front cage frame screws on
the midplane, as shown in Figure 118.
Front cage frame screws
810midpl
Front cage frame screws
Figure 118. Front cage frame screw locations
11. On the back of the DS4700 Express, remove the four Phillips screws (two
screws on each side) that hold the sides of the DS4700 Express chassis to the
sides of the rails.
12. On the front of the DS4700 Express, remove the four M5 screws (two screws
on each side) on the DS4700 Express chassis that hold the DS4700 Express
to the rails.
Attention: The unit must be removed from the rack and placed on a level
ESD protected surface before servicing it.
13. Pull the chassis outward from the front of the rack and remove from the rack.
Place it on a level surface. Look for a row of three Phillips screws on top of the
chassis and a row of four Phillips screws on the bottom of the chassis, as
#1 Phillips screwdriver. Save these screws.
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Screws
ds470096
Screws
Figure 119. Screws holding the top and bottom sides of the chassis to the cage frame
14. Grasp the blue handle in the center of the front cage frame and pull it outward
to slide the front cage frame out approximately two inches. Grab the two sides
of the front cage frame and remove it from the chassis.
Note: The front cage frame might be tightly secured in the chassis. IBM
recommends mounting the DS4700 Express chassis back in the rack
using the four M5 screws to hold the DS4700 Express chassis in place
while you pull on the blue handle to separate the front cage frame from
the chassis. Remove the DS4700 Express chassis from the rack and
place it on a level surface after you remove the failed front cage frame
for the next step.
15. Unpack the new front cage frame with the midplane. Save the packaging
materials in case you need to return it.
16. Insert the new front cage plane/midplane by aligning it with the storage
subsystem front opening and slowly sliding it into the storage subsystem
chassis. Make sure that the front cage frame EMC gaskets do not snag
between the frame and chassis.
18. Install the seven Phillips screws (three on top and four on bottom) that hold the
front cage frame to the EXP810 chassis that you removed in step 13 on page
19. Push the chassis all the way back into the rail and install the four M5 screws
along the side edges of the DS4700 Express chassis.
20. Install the four Phillips screws on the back along the sides of the DS4700
Express chassis that hold the DS4700 Express to the rails.
21. Insert the E-DDM CRUs. Be sure you insert them in the correct slots. Use the
labels you put on them before you removed them to guide you.
on page 150 for instructions.
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23. Re-insert the controllers and reconnect the fibre channel cables.
24. Re-insert the power supply and fan units and reconnect the power supply
cords.
25. (For DS4700 Express Storage Subsystems with dc power supply and fan units
only) Turn on all attached disconnect devices before proceeding to step 26.
26. Power on the attached storage expansion enclosures.
27. Wait at least 3 minutes and then power on the DS4700 Express Storage
Subsystem. Verify the status of the configuration using LEDs and the DS4000
Storage Manager client program.
28. After removing the faulty cage frame with midplane assembly, transpose the
DS4700 Express serial number, machine type, and model tag from the faulty
cage frame assembly to the Repair Identification (RID) tag on the new cage
frame assembly. The RID tag is important in transferring the serial number,
machine type, and model from the faulty cage frame assembly to the new
cage frame assembly. Ensure that the new RID tag is affixed to the new cage
frame assembly before you dispose of the faulty cage frame with midplane
assembly. This will ensure that the warranty coverage is not interrupted.
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Chapter 6. Hardware maintenance
This chapter contains information to help you solve some of the simpler problems
that you might have with your storage subsystem. It contains the problem indicators
and error messages along with suggested actions to take to resolve the problem.
For instructions on how to obtain service and technical assistance for your storage
subsystem and other IBM products, see “Getting information, help, and service” on
General checkout
Use the indicator lights, the diagnostics and test information, the symptom-to-FRU
index, and the connected server HMM to diagnose problems.
The PD maps found in the IBM System Storage DS4000 Problem Determination
Guide provide you with additional diagnostic aids.
Solving problems
This section contains information to help you solve some of the problems you might
symptoms and error messages, along with suggested actions to take to resolve
problems.
Always use the DS4000 Storage Manager client to diagnose storage subsystem
problems and component failures and find solutions to problems that have definite
symptoms.
error messages, along with suggested actions as a guide for troubleshooting
problems in addition to the DS4000 Storage Manager Recovery Guru in the
FRU replacement decision.
See the problem determination maps in the DS4000 Problem Determination Guide
for more detailed procedures for problem isolation.
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Table 51. Symptom-to-FRU index
Problem
indicator
Component
Possible cause
Possible solutions
Amber LED is lit
Drive CRU
(Drive Fault
LED)
Note: The
green Drive
Activity LED
might also be
lit.
Drive failure
Replace the failed drive.
Note: The amber LED on the
drive is also lit if the drive slot
has a blank drive tray inserted.
Drive uncertified
Verify the drive option and FRU
part number to verify that it is
supported by the DS4700
Express Storage Subsystem. (For
RAID controller RAID controller
Replace the RAID controller. See
your controller documentation for
more information. See Chapter 5,
145 for more information.
(Fault LED)
Note:
failure
Controller
Service Action
Allowed LED
will also be lit.
Controller was
placed offline by a
user or the other
controller.
Use the menu function in the
DS4700 Express Subsystem
Management window to place the
controller back online. If the
controller continues going to an
offline state after being placed
online, replace the RAID
controller.
Unsupported
Use the Storage Manager Client
controller type. For Subsystem Management window
example, a DS4200 and Recovery Guru to verify that
Express FRU is
inserted into a
DS4700 Express
chassis.
the correct controller FRU is
used. Replace with the correct
DS4700 Express controller FRU.
RAID controller No incoming signal Reconnect the SFP modules and
(Port Bypass
LED)
detected
the fibre-channel cables. Verify
the input and output SFP using
the path failure determination
instruction in the DS4000
Problem Determination Guide
and the FC loopback and
female-female LC connector.
Replace either input or output
SFP modules or fibre channel
cables as necessary.
Incorrect enclosure When connecting storage
speed setting
expansion enclosures to the
existing operating redundant
drive loop with a different speed
setting, the port goes into bypass
mode because mixing different
speed enclosures within the
same redundant drive
loop/channel is not supported.
RAID controller
failure
If the RAID controller Fault LED
is lit, also replace the RAID
controller.
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Table 51. Symptom-to-FRU index (continued)
Problem
indicator
Component
Possible cause
Possible solutions
Amber LED is lit
(continued)
Front panel
General machine
fault
A Fault LED is lit somewhere on
the storage subsystem (check for
Amber LEDs on CRUs).
(Global
Summary Fault
LED)
General machine
fault (continued)
Open the DS4700 Express
Storage Subsystem Management
window and click on the
Recovery Guru to see problems
in the DS4700 Express
configuration.
Some errors will cause the
Global Summary Fault LED to be
lit but will not cause any
individual CRU Fault LEDs to be
lit. (Drive PFA exceeded or
nominal temperature exceeded
errors are a few examples.)
Follow the corrective actions in
the Recovery Guru window.
Fibre-channel
Check that the CRUs are
connection failure
properly installed. If none of the
amber LEDs are lit on any of the
CRUs, this indicates an SFP
module transmission fault in the
storage subsystem. Replace the
failed SFP module. See the
DS4000 Storage Manager
software documentation for more
information.
Battery unit
fault
Battery unit failure
Verify the failure using DS4000
Storage Manager Client and
replace the failing battery.
Amber LED is lit
and green LED is CRU
off
Power supply
The power switch is Replace the failed power supply
turned off or there is or turn on all power supply
an ac power failure. switches.
Amber and green Power supply
Power supply failure Replace the failed power supply.
LEDs are lit
CRU
Operating
environment is too
hot
Cool down the environment.
(Fault and
Power LEDs lit;
SAA lit; Direct
Current Enable
LED is not lit)
Fan failure
Replace the power supply and
fan unit CRU
All amber and
green LEDs are
slowly flashing
All drive CRUs The DS4700 Express controllers are going through
start-of-day process (booting up). Wait up to five
minutes for the controllers to complete the booting
process. If the drive Activity LEDs are not steady lit or
momentarily flicker, and the amber LEDs are unlit after
waiting more than six minutes, contact IBM support.
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Table 51. Symptom-to-FRU index (continued)
Problem
indicator
Component
Possible cause
Possible solutions
All green LEDs
are off
All CRUs
Subsystem power is Check that all storage subsystem
off
power cables are plugged in and
the power switches are on. If
applicable, check that the main
circuit breakers for the rack are
powered on.
AC power failure
Check the main circuit breaker
and ac outlet.
Power supply failure Replace the power supply.
Operating
environment is too
hot
Cool down the environment.
Amber LED is
flashing
Drive CRUs
(Fault LED lit)
Drive identity is in
process
No corrective action needed.
Use the Read Link Status
RAID controller An FC loop
port bypass
initialization process window in the Storage Manager
(LIP) is being
generated in the
Client Subsystem Management
window and the storage
drive loop due to a subsystem event logs to isolate
faulty component.
the faulty component.
Controller drive The enclosure
Use the Recovery Guru menu
port bypass
LED
speed was set to 4 function in the Storage Manager
Gbps but the SFP
inserted in the
Client Subsystem Management
window to verify the problem and
controller drive SFP replace the SFP with a 4 Gbps
port does not
SFP.
operate at 4 Gbps.
General Fault
LED (located
on the front of
the storage
An intermittent
failure in the
DS4700
ExpressStorage
Subsystem
Use the Recovery Guru menu
function in the Storage Manager
Client Subsystem Management
window to diagnose the problem.
subsystem)
configuration. The
problem could be
directly related to
the hardware in the
configuration (hard
drive or bad cable)
or indirectly related
to the DS4700
Express Storage
Subsystem
configuration (such
as a fibre channel
host bus adapter
failure in the host
server or the fibre
channel switch in
the SAN causing
LUNs to be on a
non-preferred path.)
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Table 51. Symptom-to-FRU index (continued)
Problem
indicator
Component
Possible cause
Possible solutions
One or more
green LEDs are
off
Power supply
CRUs
Power cable is
unplugged or
switches are turned switches are turned on.
off.
Make sure that the power cable
is plugged in and that the
All drive CRUs Midplane failure
Several CRUs Hardware failure
Replace the midplane. Contact
an IBM technical support
representative.
Replace the affected CRUs. If
this does not correct the problem,
replace the RAID controllers,
followed by the midplane.
Contact an IBM technical support
representative.
Front panel
Power supply
problem
Make sure that the power cables
are plugged in and that the
power supplies are turned on.
Hardware failure
If any other LEDs are lit, replace
the midplane. Contact an IBM
technical support representative.
Intermittent or
sporadic power
loss to the storage
subsystem
Some or all
CRUs
Defective ac power Check the ac power source.
source or
Reseat all installed power cables
and power supplies. If applicable,
check the power components
(power units or universal power
supply). Replace defective power
cables.
improperly
connected power
cable
Power supply failure Check the power supply Fault
LED on the power supply. If the
LED is lit, replace the failed CRU.
Midplane failure
Have the midplane replaced.
Contact an IBM technical support
representative.
Unable to access Drives and
Incorrect storage
subsystem ID
settings
Ensure that the fibre-channel
optical cables are undamaged
and properly connected. Check
the storage subsystem ID
settings.
drives
fibre-channel
loop
Note: Change the switch
position only when your storage
subsystem is powered off.
RAID controller
failure
Replace one or both RAID
controllers. Contact an IBM
technical support representative.
Drive or drives
failed
Replace failed drive or drives.
Random errors
Subsystem
Midplane failure
Have the midplane replaced.
Contact an IBM technical support
representative.
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Table 51. Symptom-to-FRU index (continued)
Problem
indicator
Component
Possible cause
Possible solutions
Hard disk drive
not visible in RAID
management
software
Several CRUs Drive or drives
failed
Replace failed drive or drives.
FC cable failed
SFP failed
Replace FC cable.
Replace SFP.
RAID controller
failure
Replace RAID controller.
Midplane failure
Have the midplane replaced.
Contact an IBM technical support
representative.
Drive CRU has
interface problem
with the ESM or
controller.
Replace the drive CRU.
Incorrect firmware
version
Verify that the DS4700 Express
Storage Subsystem has the
correct firmware version. Refer to
A controller has
Replace the failed controller and
failed in addition to ESM.
the ESM failure in
the drive channel
that originates from
the functioning
controller.
Parts listing
Figure 120 on page 189 and the following table provide a parts listing for the
DS4700 Express.
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1
6
2
3
5
4
7
Figure 120. DS4700 Express Storage Subsystem parts list
Table 52. Parts listing (DS4700 Express Storage Subsystem)
Index
DS4700 Express Storage Subsystem
FRU P/N
41Y5152
41Y5155
1
2
Rail kit
AC power supply and fan unit FRU, 600 W
(Models that are not NEBs Level 3/Telco
compliant)
AC power supply and fan unit FRU, 600 W
(Models that are NEBs Level 3/Telco
compliant)1
42D3346
DC power supply and fan unit FRU
Controller model 70
42D3290
39M5896
3
4
Controller model 72
41Y0676
41Y0724
Cage frame assembly, midplane
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Table 52. Parts listing (DS4700 Express Storage Subsystem) (continued)
Index
5
DS4700 Express Storage Subsystem
FRU P/N
2 Gbps FC, 73.4 GB/10K drive module
42D0386
2 Gbps FC, 146.8 GB/10K drive module
2 Gbps FC, 300 GB/10K drive module
2 Gbps FC, 36.4 GB/15K drive module
2 Gbps FC, 73.4 GB/15K drive module
2 Gbps FC, 146.8 GB 15K drive module
4 Gbps FC, 36.4 GB/15K drive module
4 Gbps FC, 73.4 GB/15K drive module
4 Gbps FC, 146.8 GB/15K drive module
42D0369
42D0370
42D0371
42D0372
42D0373
40K6815
40K6819
40K6823
39M4557
43W9715
3 Gbps SATA, 500 GB HS, 7200 RPM drive
module
3 Gbps SATA, 750 GB HS, 7200 RPM drive
module
6
7
Battery backup unit
Telco filter bezel assembly
Blank drive module
Cable, FRU-1M
41Y0679
42D3308
42D3315
39M5699
39M5700
39M5701
39M5942
22R6443
39M5914
39M5081
39M5377
42D3295
42D3283
Cable, FRU-5M
Cable, FRU-25M
Serial cable adapter (RoHS)
SFP LC (shortwave) 4 Gbps
LC wrap plug assembly
Power cord, 2.8M
AC power cord jumper
DC power cord jumper
Filter pack
Notes:
1. To identify whether a DS4700 Express Storage Subsystem is NEBS/Telco compliant,
check the serial number. Any DS4700 Express Storage Subsystem with serial numbers
starting at 138500A and higher are NEBS level 3/Telco compliant.
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Appendix A. Records
Whenever you add options to your DS4700 Express, be sure to update the
information in this appendix. Accurate, up-to-date records make it easier to add
other options and provide needed data whenever you contact your IBM technical
support representative.
Identification numbers
Record and retain the following information.
Product name:
IBM System Storage DS4000 DS4700 Express
Storage Subsystem
Machine type:
Model number:
Serial number:
1814
70A, 70H, 70S, 70T, 72A, 72H, 72S, 72T
The serial number is located on the bottom inside surface at the rear and on the left
edge at the front of the DS4700 Express.
© Copyright IBM Corp. 2010
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Storage subsystem and controller information record
management types, Ethernet hardware addresses, and IP addresses. Make a copy
of this table and complete the information for your storage subsystems and
controllers. Use the information to set up the BOOTP table for the network server
and the host or Domain Name System (DNS) table. The information is also helpful
if you add storage subsystems after initial installation. Refer to your Storage
Manager documentation for detailed instructions about how to obtain the
Table 53. Storage subsystem and controller information record
Storage
subsystem
name
Management Controllers-Ethernet and IP
method addresses, and host name
Host-IP address
and host name
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Sample information record
subsystems that are managed by using both the direct-management and
host-agent-management method.
Table 54. Sample information record
Storage
subsystem name method
Management
Controllers-Ethernet and IP
addresses, and host name
Host-IP address
and host name
Controller A
Controller B
Finance
Direct
Hardware
Hardware
Ethernet address Ethernet address
= 00a0b8020420 = 00a0b80000d8
IP address =
IP address =
192.168.128.101 192.168.128.102
Host = Denver_a Host = Denver_b
Engineering
Host-agent
IP address =
192.168.2.22
Host = Atlanta
Appendix A. Records 193
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Installed device records
Use the following table to record the number of the hard disk drives that you
replaced and the corresponding bay number.
Attention: If you replace a hard disk drive in the wrong drive bay it might cause a
loss of data.
Table 55. Hard disk drive record
Replaced hard disk drive serial
Bay number Hard disk drive serial number
number
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Appendix B. Rack mounting template
This appendix provides duplicate copies of the rack mounting templates. If you want
to tear out the templates from this document for easier use, use these copies rather
than those provided in “Installing the support rails” on page 36.
to identify the proper locations for inserting M5 screws when mounting the support
rails and DS4700 Express to a rack. The locations for the M5 screws are
highlighted in the templates.
The DS4700 Express is 3 U high. Align the template with the rack at a U boundary.
U boundaries are shown as horizontal dashed lines in the rack mounting templates.
Note: The mounting holes that are shown in the following templates are square.
The holes in your rack might be round or square.
© Copyright IBM Corp. 2010
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3 U
3 U
DS4700
FRONT
Bezel
Bezel
(Front Left)
Install second --->
Rack Mounting(Front Right)
Template
Install first --->
<--- Install first
2 U
2 U
Install first --->
<--- Install first
1 U
1 U
Rail assembly
(Front Left)
Rail assembly
(Front Right)
Install second --->
0 U
0 U
Figure 121. Front rack mounting template
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Appendix C. Power cords
For your safety, IBM provides a power cord with a grounded attachment plug to use
with this IBM product. To avoid electrical shock, always use the power cord and
plug with a properly grounded outlet.
IBM power cords used in the United States and Canada are listed by Underwriter's
Laboratories (UL) and certified by the Canadian Standards Association (CSA).
For units intended to be operated at 115 volts: Use a UL-listed and CSA-certified
cord set consisting of a minimum 18 AWG, Type SVT or SJT, three-conductor cord,
a maximum of 15 feet in length and a parallel blade, grounding-type attachment
plug rated 15 amperes, 125 volts.
For units intended to be operated at 230 volts (U.S. use): Use a UL-listed and
CSA-certified cord set consisting of a minimum 18 AWG, Type SVT or SJT,
three-conductor cord, a maximum of 15 feet in length and a tandem blade,
grounding-type attachment plug rated 15 amperes, 250 volts.
For units intended to be operated at 230 volts (outside the U.S.): Use a cord set
with a grounding-type attachment plug. The cord set should have the appropriate
safety approvals for the country in which the equipment will be installed.
IBM power cords for a specific country or region are usually available only in that
country or region.
Table 56. IBM power cords
IBM power cord Feature
Used in these countries or
regions
part number
code
Description
39Y7931
9800
Power Cord (125v,
10A, 4.3m)
Antigua and Barbuda, Aruba,
Bahamas, Barbados, Belize,
Bermuda, Bolivia, Cayman Islands,
Costa Rica, Columbia, Cuba,
Dominican Republic, Ecuador, El
Salvador, Guam, Guatemala, Haiti,
Honduras, Jamaica, Mexico,
Micronesia (Federal States of),
Netherlands Antilles, Nicaragua,
Panama, Peru, Philippines, Saudi
Arabia, Thailand, Turks and Caicos
Islands, United States, Venezuela
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Table 56. IBM power cords (continued)
IBM power cord Feature
Used in these countries or
regions
part number
code
Description
39Y7917
9820
Power Cord (250v,
10A, 2.8m)
Afghanistan, Albania, Algeria,
Andorra, Angola, Armenia, Austria,
Azerbaijan, Belarus, Belgium,
Benin, Bosnia and Herzegovina,
Bulgaria, Burkina Faso, Burundi,
Cambodia, Cameroon, Cape Verde,
Central African Republic, Chad,
Comoros, Congo (Democratic
Republic of), Congo (Republic of),
Cote D'Ivoire (Ivory Coast), Croatia
(Republic of), Czech Rep,
Dahomey, Djibouti, Egypt,
Equatorial Guinea, Eritrea, Estonia,
Ethiopia, Finland, France, French
Guyana, French Polynesia, Gabon,
Georgia, Germany, Greece,
Guadeloupe, Guinea, Guinea
Bissau, Hungary, Iceland,
Indonesia, Iran, Kazakhstan,
Kyrgyzstan, Laos (Peoples
Democratic Republic of), Latvia,
Lebanon, Lithuania, Luxembourg,
Macedonia (former Yugoslav
Republic of), Madagascar, Mali,
Martinique, Mauritania, Mauritius,
Mayotte, Moldova (Republic of),
Monaco, Mongolia, Morocco,
Mozambique, Netherlands, New
Caledonia, Niger, Norway, Poland,
Portugal, Reunion, Romania,
Russian Federation Rwanda, Sao
Tome and Principe, Saudi Arabia,
Senegal, Serbia, Slovakia, Slovenia
(Republic of), Somalia, Spain,
Suriname, Sweden, Syrian Arab
Republic, Tajikistan, Tahiti, Togo,
Tunisia, Turkey, Turkmenistan,
Ukraine, Upper Volta, Uzbekistan,
Vanuatu, Vietnam, Wallis and
Futuna, Yugoslavia (Federal
Republic of), Zaire
39Y7918
9821
Power Cord (250v,
10A, 2.8m)
Denmark
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Table 56. IBM power cords (continued)
IBM power cord Feature
Used in these countries or
regions
part number
code
Description
39Y7923
9825
Power Cord (250v,
10A, 2.8m)
Abu Dhabi, Bahrain, Botswana,
Brunei Darussalam, Channel
Islands, Cyprus, Dominica, Gambia,
Ghana, Grenada, Guyana, Hong
Kong, Iraq, Ireland, Jordan, Kenya,
Kuwait, Liberia, Malawi, Malaysia,
Malta, Myanmar (Burma), Nigeria,
Oman, Qatar, Saint Kitts & Nevis,
Saint Lucia, Saint Vincent and the
Grenadines, Seychelles, Sierra
Leone, Singapore, Sudan, Tanzania
(United Republic of), Trinidad &
Tobago, United Arab Emirates
(Dubai), United Kingdom, Yemen,
Zambia, Zimbabwe
39Y7920
39Y7919
39Y7922
9827
9828
9829
Power Cord (250v,
10A, 2.8m)
Israel
Power Cord (250v,
10A, 2.8m)
Liechtenstein, Switzerland
Power Cord (250v,
10A, 2.8m)
Bangladesh, Lesotho, Maceo,
Maldives, Namibia, Nepal, Pakistan,
Samoa, South Africa, Sri Lanka,
Swaziland, Uganda
39Y7925
39Y7921
39M7924
39Y7930
39Y7928
39M2830
39Y7929
39Y7927
39Y7926
N/A
9845
9830
9831
9834
9840
9841
9842
9843
9844
9986
Power Cord (250v,
12A, 2.8m)
Korea (Democratic Peoples
Republic of)
Power Cord (250v,
10A, 2.8m)
Chile, Italy, Libyan Arab Jamahiriya
Power Cord (250v,
10A, 2.8m)
Australia, Fiji, Kiribati, Nauru, New
Zealand, Papua New Guinea
Power Cord (250v,
10A, 2.8m)
Argentina, Paraguay, Uruguay
Power Cord (250v,
10A, 2.8m)
China
Taiwan
Brazil
India
Power Cord 1.8m
long
Power Cord (125v,
10A, 2.8m)
Power Cord (250v,
10A, 2.8m)
Power Cord (125v,
10A, 4.3m)
Japan
Power Cord (125v,
10A, 1.8m) -
US/Chicago
Appendix C. Power cords 201
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Appendix D. Additional DS4000 documentation
The following tables present an overview of the IBM System Storage DS4000
Storage Manager, Storage Subsystem, and Storage Expansion Enclosure product
libraries, as well as other related documents. Each table lists documents that are
included in the libraries and what common tasks they address.
You can access the documents listed in these tables at both of the following Web
sites:
DS4000 Storage Manager Version 10 library
library with its related common user tasks.
Table 57. DS4000 Storage Manager Version 10 titles by user tasks
Title
User tasks
Planning
Hardware
Software
Configuration
Operation and
Diagnosis and
installation
installation
administration maintenance
IBM System
Storage DS4000
Storage Manager
Installation and Host
Support Guide for
Windows
U
U
U
2000/Server
2003/2008,
NetWare, VMWare
ESX Server, and
Linux
IBM System
Storage DS4000
Storage Manager
Installation and Host
Support Guide for
AIX, UNIX, Solaris,
and Linux on
U
U
U
POWER
IBM System
Storage DS4000
Storage Manager
Copy Services
User's Guide
U
U
U
U
U
U
U
IBM System
Storage DS4000
Storage Manager
Concepts Guide
U
U
U
© Copyright IBM Corp. 2010
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Table 57. DS4000 Storage Manager Version 10 titles by user tasks (continued)
Title
User tasks
Planning
Hardware
Software
Configuration
Operation and
Diagnosis and
installation
installation
administration maintenance
IBM System
Storage DS4000
Fibre Channel and
Serial ATA Intermix
Premium Feature
Installation
U
U
U
U
Overview
DS4800 Storage Subsystem library
its related common user tasks.
Table 58. DS4800 Storage Subsystem document titles by user tasks
Title
User Tasks
Planning
Hardware
Software
Configuration
Operation and
Diagnosis and
Installation
Installation
Administration Maintenance
IBM System Storage
DS4800 Storage
Subsystem
Installation, User's
and Maintenance
Guide
U
U
U
U
U
IBM System Storage
Quick start guide,
Quick reference for
the DS4800
U
U
U
U
U
IBM TotalStorage
DS4800 Controller
Cache Upgrade Kit
Instructions
U
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DS4700 Storage Subsystem library
its related common user tasks.
Table 59. DS4700 Storage Subsystem document titles by user tasks
Title
User Tasks
Planning
Hardware
Software
Configuration
Operation and
Diagnosis and
Installation
Installation
Administration Maintenance
IBM System Storage
DS4700 Storage
Subsystem
Installation, User's
and Maintenance
Guide
U
U
U
U
U
IBM System Storage
Quick start guide,
Quick reference for
the DS4700 and
DS4200, Sections 2,
3, and 4 also for
installing the
U
U
U
EXP810 and
EXP420
Appendix D. Additional DS4000 documentation 205
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DS4500 Storage Subsystem library
Subsystem library with its related common user tasks.
Table 60. DS4500 Storage Subsystem document titles by user tasks
Title
User Tasks
Planning
Hardware
Software
Configuration
Operation and
Diagnosis and
Installation
Installation
Administration Maintenance
IBM TotalStorage
DS4500 Storage
Subsystem
Installation, User's,
and Maintenance
Guide
U
U
U
U
U
IBM TotalStorage
DS4500 Storage
Subsystem Cabling
Instructions
U
U
U
U
IBM TotalStorage
DS4500 Rack
Mounting
Instructions
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DS4400 Storage Subsystem library
Subsystem library with its related common user tasks.
Table 61. DS4400 Storage Subsystem document titles by user tasks
Title
User Tasks
Planning
Hardware
Software
Configuration
Operation and
Diagnosis and
Installation
Installation
Administration Maintenance
IBM TotalStorage
DS4400 Fibre
Channel Storage
Server User's Guide
U
U
U
U
U
U
U
U
U
IBM TotalStorage
DS4400 Fibre
Channel Storage
Server Installation
and Support Guide
U
U
IBM TotalStorage
DS4400 Fibre
Channel Cabling
Instructions
Appendix D. Additional DS4000 documentation 207
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DS4300 Storage Subsystem library
Subsystem library with its related common user tasks.
Table 62. DS4300 Storage Subsystem document titles by user tasks
Title
User Tasks
Planning
Hardware
Software
Configuration
Operation and
Diagnosis and
Installation
Installation
Administration Maintenance
IBM TotalStorage
DS4300 Storage
Subsystem
Installation, User's,
and Maintenance
Guide
U
U
U
U
U
IBM TotalStorage
DS4300 Rack
Mounting
U
U
U
U
Instructions
IBM TotalStorage
DS4300 Storage
Subsystem Cabling
Instructions
IBM TotalStorage
DS4300 SCU Base
Upgrade Kit
U
U
U
U
IBM TotalStorage
DS4300 SCU Turbo
Upgrade Kit
IBM TotalStorage
DS4300 Turbo
Models 6LU/6LX
Upgrade Kit
U
U
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DS4200 Express Storage Subsystem library
library with its related common user tasks.
Table 63. DS4200 Express Storage Subsystem document titles by user tasks
Title
User Tasks
Planning
Hardware
Software
Configuration
Operation and
Diagnosis and
Installation
Installation
Administration Maintenance
IBM System Storage
DS4200 Express
Storage Subsystem
Installation, User's
and Maintenance
Guide
U
U
U
U
U
IBM System Storage
Quick start guide,
Quick reference for
the DS4700 and
DS4200, Sections 2,
3, and 4 also for
installing the
U
U
U
EXP810 and
EXP420
Appendix D. Additional DS4000 documentation 209
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DS4100 Storage Subsystem library
Subsystem library with its related common user tasks.
Table 64. DS4100 Storage Subsystem document titles by user tasks
Title
User Tasks
Planning
Hardware
Software
Configuration
Operation and
Diagnosis and
Installation
Installation
Administration Maintenance
IBM TotalStorage
DS4100 Storage
Server Installation,
User's and
U
U
U
U
U
U
Maintenance Guide
IBM TotalStorage
DS4100 Storage
Server Cabling
Guide
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DS4000 Storage Expansion Enclosure documents
tasks.
Table 65. DS4000 Storage Expansion Enclosure document titles by user tasks
Title
User Tasks
Planning
Hardware
Software
Configuration
Operation and
Diagnosis and
Installation
Installation
Administration Maintenance
IBM System Storage
DS4000 EXP810
Storage Expansion
Enclosure
U
U
U
U
U
Installation, User's,
and Maintenance
Guide
IBM System Storage
Quick start guide,
Quick reference for
the DS4700 and
DS4200, Sections 2,
3, and 4 also for
installing the
U
U
U
EXP810 and
EXP420
IBM TotalStorage
DS4000 EXP700
and EXP710
Storage Expansion
Enclosures
U
U
U
U
U
Installation, User's,
and Maintenance
Guide
IBM DS4000
EXP500 Installation
and User's Guide
U
U
U
U
U
U
U
U
U
U
IBM System Storage
DS4000 EXP420
Storage Expansion
Enclosure
Installation, User's,
and Maintenance
Guide
IBM System Storage
DS4000 Hard Drive
and Storage
Expansion
U
U
Enclosures
Installation and
Migration Guide
Appendix D. Additional DS4000 documentation 211
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Other DS4000 and DS4000-related documents
tasks.
Table 66. DS4000 and DS4000–related document titles by user tasks
Title
User Tasks
Planning
Hardware
Software
Configuration
Operation and
Diagnosis and
Installation
Installation
Administration Maintenance
IBM Safety
Information
U
IBM TotalStorage
DS4000 Hardware
Maintenance Manual
¹
U
U
IBM System Storage
DS4000 Problem
Determination Guide
IBM Fibre Channel
Planning and
Integration: User's
Guide and Service
Information
U
U
U
U
U
U
U
IBM TotalStorage
DS4000 FC2-133
Host Bus Adapter
Installation and
User's Guide
IBM TotalStorage
DS4000 FC2-133
Dual Port Host Bus
Adapter Installation
and User's Guide
IBM Netfinity® Fibre
Channel Cabling
Instructions
U
U
IBM Fibre Channel
SAN Configuration
Setup Guide
U
U
U
U
Notes:
1. The IBM TotalStorage DS4000 Hardware Maintenance Manual does not contain maintenance information for the
IBM System Storage DS4100, DS4200, DS4300, DS4500, DS4700, or DS4800 storage subsystems. You can find
maintenance information for these products in the IBM System Storage DSx000 Storage Subsystem Installation,
User's, and Maintenance Guide for the particular subsystem.
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Appendix E. Accessibility
This section provides information about alternate keyboard navigation, which is a
DS4000 Storage Manager accessibility feature. Accessibility features help a user
who has a physical disability, such as restricted mobility or limited vision, to use
software products successfully.
By using the alternate keyboard operations that are described in this section, you
can use keys or key combinations to perform Storage Manager tasks and initiate
many menu actions that can also be done with a mouse.
Note: In addition to the keyboard operations that are described in this section, the
DS4000 Storage Manager version 9.14 - 10.10 (and later) software installation
packages for Windows include a screen reader software interface.
To enable the screen reader, select Custom Installation when using the installation
wizard to install Storage Manager 9.14 - 10.10 (or later) on a Windows
host/management station. Then, in the Select Product Features window, select Java
Access Bridge in addition to the other required host software components.
activate user interface components. The following terms are used in the table:
v Navigate means to move the input focus from one user interface component to
another.
v Select means to choose one or more components, typically for a subsequent
action.
v Activate means to carry out the action of a particular component.
Note: In general, navigation between components requires the following keys:
v Tab - Moves keyboard focus to the next component or to the first member
of the next group of components
v Shift-Tab - Moves keyboard focus to the previous component or to the
first component in the previous group of components
v Arrow keys - Move keyboard focus within the individual components of a
group of components
Table 67. DS4000 Storage Manager alternate keyboard operations
Short cut
F1
Action
Open the Help.
F10
Move keyboard focus to main menu bar and post first
menu; use the arrow keys to navigate through the
available options.
Alt+F4
Alt+F6
Close the management window.
Move keyboard focus between dialogs (non-modal) and
between management windows.
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Table 67. DS4000 Storage Manager alternate keyboard operations (continued)
Short cut
Action
Alt+ underlined letter
Access menu items, buttons, and other interface
components by using the keys associated with the
underlined letters.
For the menu options, select the Alt + underlined letter
combination to access a main menu, and then select the
underlined letter to access the individual menu item.
For other interface components, use the Alt + underlined
letter combination.
Ctrl+F1
Display or conceal a tool tip when keyboard focus is on
the toolbar.
Spacebar
Select an item or activate a hyperlink.
Ctrl+Spacebar
Select multiple drives in the Physical View.
(Contiguous/Non-contiguous)
AMW Logical/Physical View
To select multiple drives, select one drive by pressing
Spacebar, and then press Tab to switch focus to the next
drive you want to select; press Ctrl+Spacebar to select
the drive.
If you press Spacebar alone when multiple drives are
selected then all selections are removed.
Use the Ctrl+Spacebar combination to deselect a drive
when multiple drives are selected.
This behavior is the same for contiguous and
non-contiguous selection of drives.
End, Page Down
Esc
Move keyboard focus to the last item in the list.
Close the current dialog (does not require keyboard
focus).
Home, Page Up
Shift+Tab
Move keyboard focus to the first item in the list.
Move keyboard focus through components in the reverse
direction.
Ctrl+Tab
Tab
Move keyboard focus from a table to the next user
interface component.
Navigate keyboard focus between components or select
a hyperlink.
Down arrow
Left arrow
Right arrow
Up arrow
Move keyboard focus down one item in the list.
Move keyboard focus to the left.
Move keyboard focus to the right.
Move keyboard focus up one item in the list.
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Notices
This information was developed for products and services offered in the U.S.A.
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program, or service that does not infringe any IBM intellectual property right may be
used instead. However, it is the user's responsibility to evaluate and verify the
operation of any non-IBM product, program, or service.
IBM may have patents or pending patent applications covering subject matter
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IBM, the IBM logo, and ibm.com are trademarks or registered trademarks of
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Java and all Java-based trademarks are trademarks of Sun Microsystems, Inc., in
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Other company, product, or service names may be trademarks or service marks of
others.
Important notes
Processor speed indicates the internal clock speed of the microprocessor; other
factors also affect application performance.
CD or DVD drive speed is the variable read rate. Actual speeds vary and are often
less than the possible maximum.
When referring to processor storage, real and virtual storage, or channel volume,
KB stands for 1024 bytes, MB stands for 1 048 576 bytes, and GB stands for
1 073 741 824 bytes.
When referring to hard disk drive capacity or communications volume, MB stands
for 1 000 000 bytes, and GB stands for 1 000 000 000 bytes. Total user-accessible
capacity can vary depending on operating environments.
Maximum internal hard disk drive capacities assume the replacement of any
standard hard disk drives and population of all hard disk drive bays with the largest
currently supported drives that are available from IBM.
Maximum memory might require replacement of the standard memory with an
optional memory module.
IBM makes no representation or warranties regarding non-IBM products and
services that are ServerProven®, including but not limited to the implied warranties
of merchantability and fitness for a particular purpose. These products are offered
and warranted solely by third parties.
IBM makes no representations or warranties with respect to non-IBM products.
Support (if any) for the non-IBM products is provided by the third party, not IBM.
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Some software might differ from its retail version (if available) and might not include
user manuals or all program functionality.
Particulate contamination
Attention: Airborne particulates (including metal flakes or particles) and reactive
gases acting alone or in combination with other environmental factors such as
humidity or temperature might pose a risk to the storage expansion enclosure that
is described in this document. Risks that are posed by the presence of excessive
particulate levels or concentrations of harmful gases include damage that might
cause the storage expansion enclosure to malfunction or cease functioning
altogether. This specification sets forth limits for particulates and gases that are
intended to avoid such damage. The limits must not be viewed or used as definitive
limits, because numerous other factors, such as temperature or moisture content of
the air, can influence the impact of particulates or environmental corrosives and
gaseous contaminant transfer. In the absence of specific limits that are set forth in
this document, you must implement practices that maintain particulate and gas
levels that are consistent with the protection of human health and safety. If IBM
determines that the levels of particulates or gases in your environment have caused
damage to the storage expansion enclosure, IBM may condition provision of repair
or replacement of storage expansion enclosure or parts on implementation of
appropriate remedial measures to mitigate such environmental contamination.
Implementation of such remedial measures is a customer responsibility.
Table 68. Limits for particulates and gases
Contaminant
Limits
Particulate
v The room air must be continuously filtered with 40% atmospheric dust
spot efficiency (MERV 9) according to ASHRAE Standard 52.21.
v Air that enters a data center must be filtered to 99.97% efficiency or
greater, using high-efficiency particulate air (HEPA) filters that meet
MIL-STD-282.
v The deliquescent relative humidity of the particulate contamination
must be more than 60%2.
v The room must be free of conductive contamination such as zinc
whiskers.
Gaseous
v Copper: Class G1 as per ANSI/ISA 71.04-19853
v Silver: Corrosion rate of less than 300 Å in 30 days
1 ASHRAE 52.2-2008 - Method of Testing General Ventilation Air-Cleaning Devices for
Removal Efficiency by Particle Size. Atlanta: American Society of Heating, Refrigerating and
Air-Conditioning Engineers, Inc.
2 The deliquescent relative humidity of particulate contamination is the relative humidity at
which the dust absorbs enough water to become wet and promote ionic conduction.
3 ANSI/ISA-71.04-1985. Environmental conditions for process measurement and control
systems: Airborne contaminants. Instrument Society of America, Research Triangle Park,
North Carolina, U.S.A.
Documentation format
The publications for this product are in Adobe Portable Document Format (PDF)
and should be compliant with accessibility standards. If you experience difficulties
when you use the PDF files and want to request a Web-based format or accessible
PDF document for a publication, direct your mail to the following address:
Information Development
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205/A015
3039 E. Cornwallis Road
P.O. Box 12195
Research Triangle Park, North Carolina 27709-2195
U.S.A.
In the request, be sure to include the publication part number and title.
When you send information to IBM, you grant IBM a nonexclusive right to use or
distribute the information in any way it believes appropriate without incurring any
obligation to you.
Electronic emission notices
Federal Communications Commission (FCC) statement
Note: This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is likely to cause
harmful interference, in which case the user will be required to correct the
interference at his own expense.
Properly shielded and grounded cables and connectors must be used in order to
meet FCC emission limits. IBM is not responsible for any radio or television
interference caused by using other than recommended cables and connectors or by
unauthorized changes or modifications to this equipment. Unauthorized changes or
modifications could void the user's authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may
cause undesired operation.
Industry Canada Class A emission compliance statement
This Class A digital apparatus complies with Canadian ICES-003.
Avis de conformité à la réglementation d'Industrie Canada
Cet appareil numérique de la classe A est conforme à la norme NMB-003 du
Canada.
Australia and New Zealand Class A statement
Attention: This is a Class A product. In a domestic environment this product may
cause radio interference in which case the user may be required to take adequate
measures.
European Union EMC Directive conformance statement
This product is in conformity with the protection requirements of EU Council
Directive 2004/108/EC on the approximation of the laws of the Member States
relating to electromagnetic compatibility. IBM cannot accept responsibility for any
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failure to satisfy the protection requirements resulting from a nonrecommended
modification of the product, including the fitting of non-IBM option cards.
This product has been tested and found to comply with the limits for Class A
Information Technology Equipment according to CISPR 22/European Standard EN
55022. The limits for Class A equipment were derived for commercial and industrial
environments to provide reasonable protection against interference with licensed
communication equipment.
Attention: This is a Class A product. In a domestic environment this product may
cause radio interference in which case the user may be required to take adequate
measures.
European Community contact:
IBM Technical Regulations
Pascalstr. 100, Stuttgart, Germany 70569
Telephone: 0049 (0)711 785 1176
Fax: 0049 (0)711 785 1283
E-mail: [email protected]
Taiwanese Class A warning statement
Germany Electromagnetic Compatibility Directive
Deutschsprachiger EU Hinweis:
Hinweis für Geräte der Klasse A EU-Richtlinie zur Elektromagnetischen
Verträglichkeit
Dieses Produkt entspricht den Schutzanforderungen der EU-Richtlinie 2004/108/EG
zur Angleichung der Rechtsvorschriften über die elektromagnetische Verträglichkeit
in den EU-Mitgliedsstaaten und hält die Grenzwerte der EN 55022 Klasse A ein.
Um dieses sicherzustellen, sind die Geräte wie in den Handbüchern beschrieben zu
installieren und zu betreiben. Des Weiteren dürfen auch nur von der IBM
empfohlene Kabel angeschlossen werden. IBM übernimmt keine Verantwortung für
die Einhaltung der Schutzanforderungen, wenn das Produkt ohne Zustimmung der
IBM verändert bzw. wenn Erweiterungskomponenten von Fremdherstellern ohne
Empfehlung der IBM gesteckt/eingebaut werden.
EN 55022 Klasse A Geräte müssen mit folgendem Warnhinweis versehen werden:
“Warnung: Dieses ist eine Einrichtung der Klasse A. Diese Einrichtung kann im
Wohnbereich Funk-Störungen verursachen; in diesem Fall kann vom Betreiber
verlangt werden, angemessene Maßnahmen zu ergreifen und dafür aufzukommen.”
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Deutschland: Einhaltung des Gesetzes über die
elektromagnetische Verträglichkeit von Geräten
Dieses Produkt entspricht dem “Gesetz über die elektromagnetische Verträglichkeit
von Geräten (EMVG)”. Dies ist die Umsetzung der EU-Richtlinie 2004/108/EG in
der Bundesrepublik Deutschland.
Zulassungsbescheinigung laut dem Deutschen Gesetz über die
elektromagnetische Verträglichkeit von Geräten (EMVG) (bzw. der
EMC EG Richtlinie 2004/108/EG) für Geräte der Klasse A
Dieses Gerät ist berechtigt, in Übereinstimmung mit dem Deutschen EMVG das
EG-Konformitätszeichen - CE - zu führen. Verantwortlich für die
Konformitätserklärung des EMVG ist die IBM Deutschland GmbH, 70548 Stuttgart.
Generelle Informationen:
Das Gerät erfüllt die Schutzanforderungen nach EN 55024 und EN 55022
Klasse A.
People's Republic of China Class A warning statement
Japan Voluntary Control Council for Interference (VCCI) Class A
Statement
Japan Electronics and Information Technology Industries Association
(JEITA) Statement (less than or equal to 20 A per phase)
Korean Communications Commission (KCC) Class A Statement
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Glossary
host system and the external fibre-channel (FC) link and
vice versa. Also called an I/O adapter, host adapter, or
FC adapter.
This glossary provides definitions for the
terminology and abbreviations used in IBM
System Storage DS4000 publications.
advanced technology (AT) bus architecture. A bus
standard for IBM compatibles. It extends the XT bus
architecture to 16 bits and also allows for bus
mastering, although only the first 16 MB of main
memory are available for direct access.
If you do not find the term you are looking for, see
the IBM Glossary of Computing Terms located at
the following Web site:
agent. A server program that receives virtual
connections from the network manager (the client
program) in a Simple Network Management
Protocol-Transmission Control Protocol/Internet Protocol
(SNMP-TCP/IP) network-managing environment.
This glossary also includes terms and definitions
from:
v Information Technology Vocabulary by
Subcommittee 1, Joint Technical Committee 1,
of the International Organization for
AGP. See accelerated graphics port.
Standardization and the International
AL_PA. See arbitrated loop physical address.
Electrotechnical Commission (ISO/IEC
JTC1/SC1). Definitions are identified by the
symbol (I) after the definition; definitions taken
from draft international standards, committee
drafts, and working papers by ISO/IEC
JTC1/SC1 are identified by the symbol (T) after
the definition, indicating that final agreement
has not yet been reached among the
arbitrated loop. One of three existing fibre-channel
topologies, in which 2 - 126 ports are interconnected
serially in a single loop circuit. Access to the Fibre
Channel Arbitrated Loop (FC-AL) is controlled by an
arbitration scheme. The FC-AL topology supports all
classes of service and guarantees in-order delivery of
FC frames when the originator and responder are on
the same FC-AL. The default topology for the disk array
is arbitrated loop. An arbitrated loop is sometimes
referred to as a Stealth Mode.
participating National Bodies of SC1.
v IBM Glossary of Computing Terms. New York:
McGraw-Hill, 1994.
arbitrated loop physical address (AL_PA). An 8-bit
value that is used to uniquely identify an individual port
within a loop. A loop can have one or more AL_PAs.
The following cross-reference conventions are
used in this glossary:
array. A collection of fibre-channel or SATA hard drives
that are logically grouped together. All the drives in the
array are assigned the same RAID level. An array is
sometimes referred to as a "RAID set." See also
redundant array of independent disks (RAID), RAID
level.
See
Refers you to (a) a term that is the
expanded form of an abbreviation or
acronym, or (b) a synonym or more
preferred term.
See also
Refers you to a related term.
asynchronous write mode. In remote mirroring, an
option that allows the primary controller to return a write
I/O request completion to the host server before data
has been successfully written by the secondary
controller. See also synchronous write mode, remote
mirroring, Global Copy,Global Mirroring.
Abstract Windowing Toolkit (AWT). A Java graphical
user interface (GUI).
accelerated graphics port (AGP). A bus specification
that gives low-cost 3D graphics cards faster access to
main memory on personal computers than the usual
peripheral component interconnect (PCI) bus. AGP
reduces the overall cost of creating high-end graphics
subsystems by using existing system memory.
AT. See advanced technology (AT) bus architecture.
ATA. See AT-attached.
AT-attached. Peripheral devices that are compatible
with the original IBM AT computer standard in which
signals on a 40-pin AT-attached (ATA) ribbon cable
followed the timings and constraints of the Industry
Standard Architecture (ISA) system bus on the IBM PC
AT computer. Equivalent to integrated drive electronics
(IDE).
access volume. A special logical drive that allows the
host-agent to communicate with the controllers in the
storage subsystem.
adapter. A printed circuit assembly that transmits user
data input/output (I/O) between the internal bus of the
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auto-volume transfer/auto-disk transfer (AVT/ADT).
A function that provides automatic failover in case of
controller failure on a storage subsystem.
customer replaceable unit (CRU). An assembly or
part that a customer can replace in its entirety when any
of its components fail. Contrast with field replaceable
unit (FRU).
AVT/ADT. See auto-volume transfer/auto-disk transfer.
AWT. See Abstract Windowing Toolkit.
cyclic redundancy check (CRC). (1) A redundancy
check in which the check key is generated by a cyclic
algorithm. (2) An error detection technique performed at
both the sending and receiving stations.
basic input/output system (BIOS). The personal
computer code that controls basic hardware operations,
such as interactions with diskette drives, hard disk
drives, and the keyboard.
dac. See disk array controller.
dar. See disk array router.
BIOS. See basic input/output system.
BOOTP. See bootstrap protocol.
DASD. See direct access storage device.
data striping. See striping.
bootstrap protocol (BOOTP). In Transmission Control
Protocol/Internet Protocol (TCP/IP) networking, an
alternative protocol by which a diskless machine can
obtain its Internet Protocol (IP) address and such
configuration information as IP addresses of various
servers from a BOOTP server.
default host group. A logical collection of discovered
host ports, defined host computers, and defined host
groups in the storage-partition topology that fulfill the
following requirements:
v Are not involved in specific logical drive-to-LUN
mappings
bridge. A storage area network (SAN) device that
provides physical and transport conversion, such as
fibre channel to small computer system interface (SCSI)
bridge.
v Share access to logical drives with default logical
drive-to-LUN mappings
device type. Identifier used to place devices in the
physical map, such as the switch, hub, or storage.
bridge group. A bridge and the collection of devices
connected to it.
DHCP. See Dynamic Host Configuration Protocol.
broadcast. The simultaneous transmission of data to
more than one destination.
direct access storage device (DASD). A device in
which access time is effectively independent of the
location of the data. Information is entered and retrieved
without reference to previously accessed data. (For
example, a disk drive is a DASD, in contrast with a tape
drive, which stores data as a linear sequence.) DASDs
include both fixed and removable storage devices.
cathode ray tube (CRT). A display device in which
controlled electron beams are used to display
alphanumeric or graphical data on an
electroluminescent screen.
client. A computer system or process that requests a
service of another computer system or process that is
typically referred to as a server. Multiple clients can
share access to a common server.
direct memory access (DMA). The transfer of data
between memory and an input/output (I/O) device
without processor intervention.
disk array controller (dac). A disk array controller
device that represents the two controllers of an array.
See also disk array router.
command. A statement used to initiate an action or
start a service. A command consists of the command
name abbreviation, and its parameters and flags if
applicable. A command can be issued by typing it on a
command line or selecting it from a menu.
disk array router (dar). A disk array router that
represents an entire array, including current and
deferred paths to all logical unit numbers (LUNs) (hdisks
on AIX). See also disk array controller.
community string. The name of a community
contained in each Simple Network Management
Protocol (SNMP) message.
DMA. See direct memory access.
concurrent download. A method of downloading and
installing firmware that does not require the user to stop
I/O to the controllers during the process.
domain. The most significant byte in the node port
(N_port) identifier for the fibre-channel (FC) device. It is
not used in the fibre channel-small computer system
interface (FC-SCSI) hardware path ID. It is required to
be the same for all SCSI targets logically connected to
an FC adapter.
CRC. See cyclic redundancy check.
CRT. See cathode ray tube.
CRU. See customer replaceable unit.
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drive channels. The DS4200, DS4700, and DS4800
subsystems use dual-port drive channels that, from the
physical point of view, are connected in the same way
as two drive loops. However, from the point of view of
the number of drives and enclosures, they are treated
as a single drive loop instead of two different drive
loops. A group of storage expansion enclosures are
connected to the DS4000 storage subsystems using a
drive channel from each controller. This pair of drive
channels is referred to as a redundant drive channel
pair.
receiving end. Most ECCs are characterized by the
maximum number of errors they can detect and correct.
ESD. See electrostatic discharge.
ESM canister. See environmental service module
canister.
automatic ESM firmware synchronization. When
you install a new ESM into an existing storage
expansion enclosure in a DS4000 storage subsystem
that supports automatic ESM firmware synchronization,
the firmware in the new ESM is automatically
drive loops. A drive loop consists of one channel from
each controller combined to form one pair of redundant
drive channels or a redundant drive loop. Each drive
loop is associated with two ports. (There are two drive
channels and four associated ports per controller.) For
the DS4800, drive loops are more commonly referred to
as drive channels. See drive channels.
synchronized with the firmware in the existing ESM.
EXP. See storage expansion enclosure.
expansion port (E_port). A port that connects the
switches for two fabrics.
Extended Industry Standard Architecture (EISA).
bus standard for IBM compatibles that extends the
A
DRAM. See dynamic random access memory.
Industry Standard Architecture (ISA) bus architecture to
32 bits and allows more than one central processing
unit (CPU) to share the bus. See also Industry Standard
Architecture.
Dynamic Host Configuration Protocol (DHCP).
A
protocol defined by the Internet Engineering Task Force
that is used for dynamically assigning Internet Protocol
(IP) addresses to computers in a network.
fabric. A fibre channel entity which interconnects and
facilitates logins of N_ports attached to it. The fabric is
responsible for routing frames between source and
destination N_ports using address information in the
frame header. A fabric can be as simple as a
point-to-point channel between two N-ports, or as
complex as a frame-routing switch that provides multiple
and redundant internal pathways within the fabric
between F_ports.
dynamic random access memory (DRAM).
storage in which the cells require repetitive application
of control signals to retain stored data.
A
ECC. See error correction coding.
EEPROM. See electrically erasable programmable
read-only memory.
EISA. See Extended Industry Standard Architecture.
fabric port (F_port). In a fabric, an access point for
connecting a user's N_port. An F_port facilitates N_port
logins to the fabric from nodes connected to the fabric.
An F_port is addressable by the N_port connected to it.
See also fabric.
electrically erasable programmable read-only
memory (EEPROM). A type of memory chip which can
retain its contents without consistent electrical power.
Unlike the PROM which can be programmed only once,
the EEPROM can be erased electrically. Because it can
only be reprogrammed a limited number of times before
it wears out, it is appropriate for storing small amounts
of data that are changed infrequently.
FC. See Fibre Channel.
FC-AL. See arbitrated loop.
feature enable identifier. A unique identifier for the
storage subsystem, which is used in the process of
generating a premium feature key. See also premium
feature key.
electrostatic discharge (ESD). The flow of current
that results when objects that have a static charge
come into close enough proximity to discharge.
environmental service module (ESM) canister.
component in a storage expansion enclosure that
monitors the environmental condition of the components
in that enclosure. Not all storage subsystems have ESM
canisters.
A
Fibre Channel (FC). A set of standards for a serial
input/output (I/O) bus capable of transferring data
between two ports at up to 100 Mbps, with standards
proposals to go to higher speeds. FC supports
point-to-point, arbitrated loop, and switched topologies.
E_port. See expansion port.
Fibre Channel Arbitrated Loop (FC-AL). See
arbitrated loop.
error correction coding (ECC). A method for
encoding data so that transmission errors can be
detected and corrected by examining the data on the
Fibre Channel Protocol (FCP) for small computer
system interface (SCSI). A high-level fibre-channel
mapping layer (FC-4) that uses lower-level fibre-channel
Glossary 223
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(FC-PH) services to transmit SCSI commands, data,
and status information between a SCSI initiator and a
SCSI target across the FC link by using FC frame and
sequence formats.
HBA. See host bus adapter.
hdisk. An AIX term representing a logical unit number
(LUN) on an array.
heterogeneous host environment. A host system in
which multiple host servers, which use different
operating systems with their own unique disk storage
subsystem settings, connect to the same DS4000
storage subsystem at the same time. See also host.
field replaceable unit (FRU). An assembly that is
replaced in its entirety when any one of its components
fails. In some cases, a field replaceable unit might
contain other field replaceable units. Contrast with
customer replaceable unit (CRU).
host. A system that is directly attached to the storage
subsystem through a fibre-channel input/output (I/O)
path. This system is used to serve data (typically in the
form of files) from the storage subsystem. A system can
be both a storage management station and a host
simultaneously.
FlashCopy. A premium feature for DS4000 that can
make an instantaneous copy of the data in a volume.
F_port. See fabric port.
FRU. See field replaceable unit.
GBIC. See gigabit interface converter
host bus adapter (HBA). An interface between the
fibre-channel network and a workstation or server.
gigabit interface converter (GBIC). A transceiver that
performs serial, optical-to-electrical, and
electrical-to-optical signal conversions for high-speed
networking. A GBIC can be hot swapped. See also
small form-factor pluggable.
host computer. See host.
host group. An entity in the storage partition topology
that defines a logical collection of host computers that
require shared access to one or more logical drives.
Global Copy. Refers to a remote logical drive mirror
pair that is set up using asynchronous write mode
without the write consistency group option. This is also
referred to as "Asynchronous Mirroring without
Consistency Group." Global Copy does not ensure that
write requests to multiple primary logical drives are
carried out in the same order on the secondary logical
drives as they are on the primary logical drives. If it is
critical that writes to the primary logical drives are
carried out in the same order in the appropriate
secondary logical drives, Global Mirroring should be
used instead of Global Copy. See also asynchronous
write mode, Global Mirroring, remote mirroring, Metro
Mirroring.
host port. Ports that physically reside on the host
adapters and are automatically discovered by the
DS4000 Storage Manager software. To give a host
computer access to a partition, its associated host ports
must be defined.
hot swap. To replace a hardware component without
turning off the system.
hub. In a network, a point at which circuits are either
connected or switched. For example, in a star network,
the hub is the central node; in a star/ring network, it is
the location of wiring concentrators.
IBMSAN driver. The device driver that is used in a
Novell NetWare environment to provide multipath
input/output (I/O) support to the storage controller.
Global Mirroring. Refers to a remote logical drive
mirror pair that is set up using asynchronous write mode
with the write consistency group option. This is also
referred to as "Asynchronous Mirroring with Consistency
Group." Global Mirroring ensures that write requests to
multiple primary logical drives are carried out in the
same order on the secondary logical drives as they are
on the primary logical drives, preventing data on the
secondary logical drives from becoming inconsistent
with the data on the primary logical drives. See also
asynchronous write mode, Global Copy, remote
mirroring, Metro Mirroring.
IC. See integrated circuit.
IDE. See integrated drive electronics.
in-band. Transmission of management protocol over
the fibre-channel transport.
Industry Standard Architecture (ISA). Unofficial
name for the bus architecture of the IBM PC/XT
personal computer. This bus design included expansion
slots for plugging in various adapter boards. Early
versions had an 8-bit data path, later expanded to 16
bits. The "Extended Industry Standard Architecture"
(EISA) further expanded the data path to 32 bits. See
also Extended Industry Standard Architecture.
graphical user interface (GUI). A type of computer
interface that presents a visual metaphor of a real-world
scene, often of a desktop, by combining high-resolution
graphics, pointing devices, menu bars and other menus,
overlapping windows, icons, and the object-action
relationship.
GUI. See graphical user interface.
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initial program load (IPL). The initialization procedure
that causes an operating system to commence
operation. Also referred to as a system restart, system
startup, and boot.
local area network (LAN). A computer network
located on a user's premises within a limited geographic
area.
logical block address (LBA). The address of a logical
block. Logical block addresses are typically used in
hosts' I/O commands. The SCSI disk command
protocol, for example, uses logical block addresses.
integrated circuit (IC). A microelectronic
semiconductor device that consists of many
interconnected transistors and other components. ICs
are constructed on a small rectangle cut from a silicon
crystal or other semiconductor material. The small size
of these circuits allows high speed, low power
dissipation, and reduced manufacturing cost compared
with board-level integration. Also known as a chip.
logical partition (LPAR). (1) A subset of a single
system that contains resources (processors, memory,
and input/output devices). A logical partition operates as
an independent system. If hardware requirements are
met, multiple logical partitions can exist within a system.
(2) A fixed-size portion of a logical volume. A logical
partition is the same size as the physical partitions in its
volume group. Unless the logical volume of which it is a
part is mirrored, each logical partition corresponds to,
and its contents are stored on, a single physical
partition. (3) One to three physical partitions (copies).
The number of logical partitions within a logical volume
is variable.
integrated drive electronics (IDE). A disk drive
interface based on the 16-bit IBM personal computer
Industry Standard Architecture (ISA) in which the
controller electronics reside on the drive itself,
eliminating the need for a separate adapter card. Also
known as an Advanced Technology Attachment
Interface (ATA).
Internet Protocol (IP). A protocol that routes data
through a network or interconnected networks. IP acts
as an intermediary between the higher protocol layers
and the physical network.
logical unit number (LUN). An identifier used on a
small computer system interface (SCSI) bus to
distinguish among up to eight devices (logical units) with
the same SCSI ID.
Internet Protocol (IP) address. The unique 32-bit
address that specifies the location of each device or
workstation on the Internet. For example, 9.67.97.103 is
an IP address.
loop address. The unique ID of a node in
fibre-channel loop topology sometimes referred to as a
loop ID.
interrupt request (IRQ). A type of input found on
many processors that causes the processor to suspend
normal processing temporarily and start running an
interrupt handler routine. Some processors have several
interrupt request inputs that allow different priority
interrupts.
loop group. A collection of storage area network
(SAN) devices that are interconnected serially in a
single loop circuit.
loop port. A node port (N_port) or fabric port (F_port)
that supports arbitrated loop functions associated with
an arbitrated loop topology.
IP. See Internet Protocol.
LPAR. See logical partition.
IPL. See initial program load.
IRQ. See interrupt request.
LUN. See logical unit number.
MAC. See medium access control.
ISA. See Industry Standard Architecture.
management information base (MIB). The
information that is on an agent. It is an abstraction of
configuration and status information.
Java Runtime Environment (JRE). A subset of the
Java Development Kit (JDK) for end users and
developers who want to redistribute the Java Runtime
Environment (JRE). The JRE consists of the Java virtual
machine, the Java Core Classes, and supporting files.
man pages. In UNIX-based operating systems, online
documentation for operating system commands,
subroutines, system calls, file formats, special files,
stand-alone utilities, and miscellaneous facilities.
Invoked by the man command.
JRE. See Java Runtime Environment.
label. A discovered or user entered property value that
is displayed underneath each device in the Physical and
Data Path maps.
MCA. See micro channel architecture.
media scan. A media scan is a background process
that runs on all logical drives in the storage subsystem
for which it has been enabled, providing error detection
on the drive media. The media scan process scans all
LAN. See local area network.
LBA. See logical block address.
Glossary 225
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logical drive data to verify that it can be accessed, and
optionally scans the logical drive redundancy
information.
NMS. See network management station.
non-maskable interrupt (NMI). A hardware interrupt
that another service request cannot overrule (mask). An
NMI bypasses and takes priority over interrupt requests
generated by software, the keyboard, and other such
devices and is issued to the microprocessor only in
disastrous circumstances, such as severe memory
errors or impending power failures.
medium access control (MAC). In local area
networks (LANs), the sublayer of the data link control
layer that supports medium-dependent functions and
uses the services of the physical layer to provide
services to the logical link control sublayer. The MAC
sublayer includes the method of determining when a
device has access to the transmission medium.
node. A physical device that allows for the
transmission of data within a network.
Metro Mirroring. This term is used to refer to a
remote logical drive mirror pair which is set up with
synchronous write mode. See also remote mirroring,
Global Mirroring.
node port (N_port). A fibre-channel defined hardware
entity that performs data communications over the
fibre-channel link. It is identifiable by a unique worldwide
name. It can act as an originator or a responder.
MIB. See management information base.
nonvolatile storage (NVS). A storage device whose
micro channel architecture (MCA). Hardware that is
used for PS/2 Model 50 computers and above to
provide better growth potential and performance
characteristics when compared with the original
personal computer design.
contents are not lost when power is cut off.
N_port. See node port.
NVS. See nonvolatile storage.
NVSRAM. Nonvolatile storage random access
memory. See nonvolatile storage.
Microsoft Cluster Server (MSCS). MSCS, a feature
of Windows NT Server (Enterprise Edition), supports the
connection of two servers into a cluster for higher
availability and easier manageability. MSCS can
automatically detect and recover from server or
application failures. It can also be used to balance
server workload and provide for planned maintenance.
Object Data Manager (ODM). An AIX proprietary
storage mechanism for ASCII stanza files that are
edited as part of configuring a drive into the kernel.
ODM. See Object Data Manager.
mini hub. An interface card or port device that
receives short-wave fiber channel GBICs or SFPs.
These devices enable redundant fibre channel
connections from the host computers, either directly or
through a fibre channel switch or managed hub, over
optical fiber cables to the DS4000 Storage Server
controllers. Each DS4000 controller is responsible for
two mini hubs. Each mini hub has two ports. Four host
ports (two on each controller) provide a cluster solution
without use of a switch. Two host-side mini hubs are
shipped as standard. See also host port, gigabit
interface converter (GBIC), small form-factor pluggable
(SFP).
out-of-band. Transmission of management protocols
outside of the fibre-channel network, typically over
Ethernet.
partitioning. See storage partition.
parity check. (1) A test to determine whether the
number of ones (or zeros) in an array of binary digits is
odd or even. (2) A mathematical operation on the
numerical representation of the information
communicated between two pieces. For example, if
parity is odd, any character represented by an even
number has a bit added to it, making it odd, and an
information receiver checks that each unit of information
has an odd value.
mirroring. A fault-tolerance technique in which
information on a hard disk is duplicated on additional
hard disks. See also remote mirroring.
PCI local bus. See peripheral component interconnect
local bus.
model. The model identification that is assigned to a
device by its manufacturer.
PDF. See portable document format.
performance events. Events related to thresholds set
on storage area network (SAN) performance.
MSCS. See Microsoft Cluster Server.
network management station (NMS). In the Simple
Network Management Protocol (SNMP), a station that
runs management application programs that monitor
and control network elements.
peripheral component interconnect local bus (PCI
local bus). A local bus for PCs, from Intel, that
provides a high-speed data path between the CPU and
up to 10 peripherals (video, disk, network, and so on).
The PCI bus coexists in the PC with the Industry
Standard Architecture (ISA) or Extended Industry
NMI. See non-maskable interrupt.
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Standard Architecture (EISA) bus. ISA and EISA boards
plug into an IA or EISA slot, while high-speed PCI
controllers plug into a PCI slot. See also Industry
Standard Architecture, Extended Industry Standard
Architecture.
recoverable virtual shared disk (RVSD). A virtual
shared disk on a server node configured to provide
continuous access to data and file systems in a cluster.
redundant array of independent disks (RAID).
A
collection of disk drives (array) that appears as a single
volume to the server, which is fault tolerant through an
assigned method of data striping, mirroring, or parity
checking. Each array is assigned a RAID level, which is
a specific number that refers to the method used to
achieve redundancy and fault tolerance. See also array,
parity check, mirroring, RAID level, striping.
polling delay. The time in seconds between
successive discovery processes during which discovery
is inactive.
port. A part of the system unit or remote controller to
which cables for external devices (such as display
stations, terminals, printers, switches, or external
storage units) are attached. The port is an access point
for data entry or exit. A device can contain one or more
ports.
redundant disk array controller (RDAC). (1) In
hardware, a redundant set of controllers (either
active/passive or active/active). (2) In software, a layer
that manages the input/output (I/O) through the active
controller during normal operation and transparently
reroutes I/Os to the other controller in the redundant set
if a controller or I/O path fails.
portable document format (PDF). A standard
specified by Adobe Systems, Incorporated, for the
electronic distribution of documents. PDF files are
compact; can be distributed globally by e-mail, the Web,
intranets, or CD-ROM; and can be viewed with the
Acrobat Reader, which is software from Adobe Systems
that can be downloaded at no cost from the Adobe
Systems home page.
remote mirroring. Online, real-time replication of data
between storage subsystems that are maintained on
separate media. The Enhanced Remote Mirror Option is
a DS4000 premium feature that provides support for
remote mirroring. See also Global Mirroring, Metro
Mirroring.
premium feature key. A file that the storage
subsystem controller uses to enable an authorized
premium feature. The file contains the feature enable
identifier of the storage subsystem for which the
premium feature is authorized, and data about the
premium feature. See also feature enable identifier.
ROM. See read-only memory.
router. A computer that determines the path of
network traffic flow. The path selection is made from
several paths based on information obtained from
specific protocols, algorithms that attempt to identify the
shortest or best path, and other criteria such as metrics
or protocol-specific destination addresses.
private loop. A freestanding arbitrated loop with no
fabric attachment. See also arbitrated loop.
program temporary fix (PTF). A temporary solution or
bypass of a problem diagnosed by IBM in a current
unaltered release of the program.
RVSD. See recoverable virtual shared disk.
SAI. See Storage Array Identifier.
SA Identifier. See Storage Array Identifier.
SAN. See storage area network.
SATA. See serial ATA.
PTF. See program temporary fix.
RAID. See redundant array of independent disks
(RAID).
RAID level. An array's RAID level is a number that
refers to the method used to achieve redundancy and
fault tolerance in the array. See also array, redundant
array of independent disks (RAID).
scope. Defines a group of controllers by their Internet
Protocol (IP) addresses. A scope must be created and
defined so that dynamic IP addresses can be assigned
to controllers on the network.
RAID set. See array.
SCSI. See small computer system interface.
RAM. See random-access memory.
segmented loop port (SL_port). A port that allows
division of a fibre-channel private loop into multiple
segments. Each segment can pass frames around as
an independent loop and can connect through the fabric
to other segments of the same loop.
random-access memory (RAM). A temporary storage
location in which the central processing unit (CPU)
stores and executes its processes. Contrast with DASD.
RDAC. See redundant disk array controller.
read-only memory (ROM). Memory in which stored
data cannot be changed by the user except under
special conditions.
sense data. (1) Data sent with a negative response,
indicating the reason for the response. (2) Data
describing an I/O error. Sense data is presented to a
host system in response to a sense request command.
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serial ATA. The standard for a high-speed alternative
to small computer system interface (SCSI) hard drives.
The SATA-1 standard is equivalent in performance to a
10 000 RPM SCSI drive.
optical fiber cables and switches. An SFP is smaller
than a gigabit interface converter (GBIC). See also
gigabit interface converter.
SNMP. See Simple Network Management Protocol and
SNMPv1.
serial storage architecture (SSA). An interface
specification from IBM in which devices are arranged in
a ring topology. SSA, which is compatible with small
computer system interface (SCSI) devices, allows
full-duplex packet multiplexed serial data transfers at
rates of 20 Mbps in each direction.
SNMP trap event. (1) (2) An event notification sent by
the SNMP agent that identifies conditions, such as
thresholds, that exceed a predetermined value. See
also Simple Network Management Protocol.
SNMPv1. The original standard for SNMP is now
referred to as SNMPv1, as opposed to SNMPv2, a
revision of SNMP. See also Simple Network
Management Protocol.
server. A functional hardware and software unit that
delivers shared resources to workstation client units on
a computer network.
server/device events. Events that occur on the server
or a designated device that meet criteria that the user
sets.
SRAM. See static random access memory.
SSA. See serial storage architecture.
SFP. See small form-factor pluggable.
static random access memory (SRAM). Random
access memory based on the logic circuit know as
flip-flop. It is called static because it retains a value as
long as power is supplied, unlike dynamic random
access memory (DRAM), which must be regularly
refreshed. It is however, still volatile, meaning that it can
lose its contents when the power is turned off.
Simple Network Management Protocol (SNMP). In
the Internet suite of protocols, a network management
protocol that is used to monitor routers and attached
networks. SNMP is an application layer protocol.
Information on devices managed is defined and stored
in the application's Management Information Base
(MIB).
storage area network (SAN). A dedicated storage
network tailored to a specific environment, combining
servers, storage products, networking products,
software, and services. See also fabric.
SL_port. See segmented loop port.
SMagent. The DS4000 Storage Manager optional
Java-based host-agent software, which can be used on
Microsoft Windows, Novell NetWare, AIX, HP-UX,
Solaris, and Linux on POWER host systems to manage
storage subsystems through the host fibre-channel
connection.
Storage Array Identifier (SAI or SA Identifier). The
Storage Array Identifier is the identification value used
by the DS4000 Storage Manager host software
(SMClient) to uniquely identify each managed storage
server. The DS4000 Storage Manager SMClient
program maintains Storage Array Identifier records of
previously-discovered storage servers in the host
resident file, which allows it to retain discovery
information in a persistent fashion.
SMclient. The DS4000 Storage Manager client
software, which is a Java-based graphical user interface
(GUI) that is used to configure, manage, and
troubleshoot storage servers and storage expansion
enclosures in a DS4000 storage subsystem. SMclient
can be used on a host system or on a storage
management station.
storage expansion enclosure (EXP). A feature that
can be connected to a system unit to provide additional
storage and processing capacity.
SMruntime. A Java compiler for the SMclient.
storage management station. A system that is used
to manage the storage subsystem. A storage
management station does not need to be attached to
the storage subsystem through the fibre-channel
input/output (I/O) path.
SMutil. The DS4000 Storage Manager utility software
that is used on Microsoft Windows, AIX, HP-UX, Solaris,
and Linux on POWER host systems to register and map
new logical drives to the operating system. In Microsoft
Windows, it also contains a utility to flush the cached
data of the operating system for a particular drive before
creating a FlashCopy.
storage partition. Storage subsystem logical drives
that are visible to a host computer or are shared among
host computers that are part of a host group.
small computer system interface (SCSI). A standard
hardware interface that enables a variety of peripheral
devices to communicate with one another.
storage partition topology. In the DS4000 Storage
Manager client, the Topology view of the Mappings
window displays the default host group, the defined host
group, the host computer, and host-port nodes. The
host port, host computer, and host group topological
small form-factor pluggable (SFP). An optical
transceiver that is used to convert signals between
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elements must be defined to grant access to host
computers and host groups using logical drive-to-LUN
mappings.
Transmission Control Protocol (TCP).
A
communication protocol used in the Internet and in any
network that follows the Internet Engineering Task Force
(IETF) standards for internetwork protocol. TCP
striping. Splitting data to be written into equal blocks
and writing blocks simultaneously to separate disk
drives. Striping maximizes performance to the disks.
Reading the data back is also scheduled in parallel, with
a block being read concurrently from each disk then
reassembled at the host.
provides a reliable host-to-host protocol between hosts
in packed-switched communication networks and in
interconnected systems of such networks. It uses the
Internet Protocol (IP) as the underlying protocol.
Transmission Control Protocol/Internet Protocol
(TCP/IP). A set of communication protocols that
provide peer-to-peer connectivity functions for both local
and wide-area networks.
subnet. An interconnected but independent segment
of a network that is identified by its Internet Protocol (IP)
address.
trap. In the Simple Network Management Protocol
(SNMP), a message sent by a managed node (agent
function) to a management station to report an
exception condition.
sweep method. A method of sending Simple Network
Management Protocol (SNMP) requests for information
to all the devices on a subnet by sending the request to
every device in the network.
trap recipient. Receiver of a forwarded Simple
Network Management Protocol (SNMP) trap.
Specifically, a trap receiver is defined by an Internet
Protocol (IP) address and port to which traps are sent.
Presumably, the actual recipient is a software
application running at the IP address and listening to
the port.
switch. A fibre-channel device that provides full
bandwidth per port and high-speed routing of data by
using link-level addressing.
switch group. A switch and the collection of devices
connected to it that are not in other groups.
switch zoning. See zoning.
TSR program. See terminate and stay resident
program.
synchronous write mode. In remote mirroring, an
option that requires the primary controller to wait for the
acknowledgment of a write operation from the
secondary controller before returning a write I/O request
completion to the host. See also asynchronous write
mode, remote mirroring, Metro Mirroring.
uninterruptible power supply. A source of power
from a battery that is installed between a computer
system and its power source. The uninterruptible power
supply keeps the system running if a commercial power
failure occurs, until an orderly shutdown of the system
can be performed.
system name. Device name assigned by the vendor's
third-party software.
user action events. Actions that the user takes, such
as changes in the storage area network (SAN), changed
settings, and so on.
TCP. See Transmission Control Protocol.
TCP/IP. See Transmission Control Protocol/Internet
Protocol.
worldwide port name (WWPN). A unique identifier for
a switch on local and global networks.
terminate and stay resident program (TSR
program). A program that installs part of itself as an
extension of DOS when it is executed.
worldwide name (WWN). A globally unique 64-bit
identifier assigned to each fibre channel port.
WORM. See write-once read-many.
topology. The physical or logical arrangement of
devices on a network. The three fibre-channel
topologies are fabric, arbitrated loop, and point-to-point.
The default topology for the disk array is arbitrated loop.
write-once read many (WORM). Any type of storage
medium to which data can be written only a single time,
but can be read from any number of times. After the
data is recorded, it cannot be altered.
TL_port. See translated loop port.
WWN. See worldwide name.
transceiver. A device that is used to transmit and
receive data. Transceiver is an abbreviation of
transmitter-receiver.
zoning. (1) In fibre channel environments, the
grouping of multiple ports to form a virtual, private,
storage network. Ports that are members of a zone can
communicate with each other, but are isolated from
ports in other zones. (2) A function that allows
segmentation of nodes by address, name, or physical
port and is provided by fabric switches or hubs.
translated loop port (TL_port). A port that connects
to a private loop and allows connectivity between the
private loop devices and off loop devices (devices not
connected to that particular TL_port).
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230 IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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Index
cabling schemes (continued)
A
a hot-swap E-DDM
a hot-swap hard disk drive
ac power supply
ac power supply and fan unit
cabling the DS4700 Express
cabling the storage subsystem
cabling topologies
B
battery
battery unit
bays
bezel
cache battery
BOOTP server
cache memory
components
C
cabling
cabling schemes
© Copyright IBM Corp. 2010
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controller
drive
controllers
drive loop configurations
connecting to DS4700 Express
drive, hard disk
DS4000
DS4000 storage expansion enclosures
DS4000 Storage Manager
D
DS4100
DS4200 Express
DS4300
DS4400
DS4500
DS4700
DS4700 Express
dc power supply
dc power supply and fan unit
DHCP server
documentation
DS4800
E
E-DDM
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Ethernet
hub
I
F
IBM System Storage DS4000
IBM System Storage DS4700 Express
indicator LEDs
fibre channel
fibre channel loop ID
fibre-channel cable adapter
fibre-channel loop and ID
indicator lights
filter and filter retainer
installation
installing and replacing devices
installing CRUs
interconnect-battery unit
G
intermixing
H
hard disk drive
L
LC-SC fibre-channel cable adapter
hot swap
LEDs
hot-swap E-DDMs
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loop configurations
power supply and fan units (dc)
power-fan canister
powering off
powering on
problem
M
managed hub
memory, cache
midplane
mixed configuration
multiple drives
R
rack cabinet
multiple E-DDMs
RAID controller
N
readme files
records
replacing
O
replacing components
P
replacing CRUs
replacing failed
power indicator light
power outage
power supply and fan unit
power supply and fan units (ac)
resources
234 IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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restoring power
storage subsystem (continued)
S
storage subsystem configuration
settings
SFP modules
storage subsystem profile
support code upgrades
switch
T
small form-factor pluggable module (SFP)
Telco bezel
Small-form Factor Pluggable modules
turning off power
steps
turning on power
storage area network (SAN)
storage expansion enclosure
storage expansion enclosures
U
storage subsystem
W
Web sites
Index 235
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Web sites (continued)
236 IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
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ꢀꢁꢂꢃ
Part Number: 94Y8472
Printed in USA
GC26-7843-05
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