Quantum LTO 2 User Manual

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Contents  
iv  
LTO-2 Half-Height Tape Drive User’s Guide  
Contents  
Configuring Digital UNIX Version 4.0 and later/Compaq Tru64 UNIX  
Configuring for the Sun Environment  
Configuring for the IBM AIX Environment (AIX Version 4.1.x  
LTO-2 Half-Height Tape Drive User’s Guide  
v
Contents  
Tape Drive Recognized during System Boot but not by Operating  
vi  
LTO-2 Half-Height Tape Drive User’s Guide  
Figures  
viii  
LTO-2 Half-Height Tape Drive User’s Guide  
Tables  
x
LTO-2 Half-Height Tape Drive User’s Guide  
Preface  
Audience  
Purpose  
This document was written for operators of the Quantum LTO-2 Half-  
Height Tape Drive.  
This document provides information about the Quantum LTO-2 Half-  
Height Tape Drive including:  
Installing the drive  
Basic drive operations  
Maintenance  
Specifications  
Troubleshooting  
Document  
This document is organized as follows:  
Organization 0  
Chapter 1, Introduction, provides an overview of LTO and Ultrium  
technologies, and summarizes the drive’s key features.  
LTO-2 Half-Height Tape Drive User’s Guide  
xi  
 
Preface  
precautions, unpacking tips, and installation instructions for the  
internal and desktop drives, as well as a summary of cabling and  
connector specifications. It also provides quick-start instructions for  
getting the drives up and running in the shortest possible time.  
Chapter 3, Operation explains the use and operation of the drive and  
describes maintenance procedures.  
Chapter 4, Theory describes the theory of operation behind the  
drives, including the technology used in various drive components.  
Chapter 5, Specifications contains detailed drive and cartridge  
specifications, as well as a summary of regulatory approvals and  
WEEE Compliance statement.  
Chapter 6, UNIX Settings describes the settings for UNIX systems.  
Chapter 7, Troubleshooting Guide provides troubleshooting  
procedures you can follow in the unlikely event you encounter a  
problem with your drive.  
This document concludes with a glossary and a detailed index.  
This manual uses the following conventions:  
Notational  
Conventions  
Note: Notes emphasize important information related to the main  
topic.  
Tech Tip: Tech Tips provide technical information which may be  
helpful in performing the procedure.  
Caution: Cautions indicate potential hazards to equipment and are  
included to prevent damage to equipment.  
Warning: Warnings indicate potential hazards to personal safety and  
are included to prevent injury.  
xii  
LTO-2 Half-Height Tape Drive User’s Guide  
Preface  
Related  
Documents related to the LTO-2 Half-Height Tape Drive are shown  
Documents  
below:  
SCSI-2 Specification  
0
The SCSI-2 communications specification is the proposed American  
National Standard for information systems, dated March 9, 1990. Copies  
may be obtained from:  
Global Engineering Documents  
15 Inverness Way, East  
Englewood, CO 80112  
(800) 854-7179 or (303) 397-2740  
Contacts  
Quantum company contacts are listed below.  
Quantum Corporate Headquarters  
0
To order documentation on the LTO-2 Half-Height Tape Drive User’s  
Guide or other products contact:  
Quantum Corporation  
P.O. Box 57100  
Irvine, CA 92619-7100  
(949) 856-7800  
(800) 284-5101  
Technical Publications  
0
0
To comment on existing documentation send e-mail to:  
Quantum Home Page  
Visit the Quantum home page at:  
LTO-2 Half-Height Tape Drive User’s Guide  
xiii  
 
Preface  
Customer Support  
0
The Quantum Customer Support Department provides a 24-hour help  
desk that can be reached at:  
North/South America:  
Asia/Pacific Rim:  
(949) 725-2100 or (800) 284-5101  
(International Code) + 61 7 3839 0988  
Europe/Middle East/Africa:  
(International Code) + 44 (0) 1256 848748  
Send faxes for the Customer Support Department to:  
North/South America:  
Asia/Pacific Rim:  
(949) 725-2176  
(International Code) + 61 7 3839 0955  
(International Code) + 44 (0) 1256 848777  
Europe/Middle East/Africa:  
Send e-mail for the Customer Support Department to:  
Asia/Pacific Rim:  
Europe/Middle East/Africa:  
Visit our web site:  
xiv  
LTO-2 Half-Height Tape Drive User’s Guide  
Chapter 1  
1Introduction  
The LTO-2 Half-Height Tape Drive is a high-performance 8-channel tape  
drive that complies with the LTO interchange specifications. It is suited  
for mid-range to high-end servers, mainframe systems, and tape library  
automation systems.  
The LTO-2 Half-Height Tape Drive uses Ultrium data cartridges. Its  
capacity is maximized using intelligent data compression. The drive has a  
native capacity of 200 Gbytes (400 Gbytes assuming 2:1 data  
compression).  
The LTO-2 Half-Height Tape Drive, as shown in figure 1 below, has a 5¼  
inch half-height form factor with automatic electromechanical cartridge  
soft load. It is available as an internal and a desktop drive.  
The internal LTO--2 half-height drive is designed to fit in a 5¼-inch  
half-height drive bay.  
The desktop LTO--2 half-height drive is a stand-alone unit with a  
built-in power supply.  
Figure 1 Drive  
Covered in this User’s  
Guide (Typical)  
LTO-2 Half-Height Tape Drive User’s Guide  
1
       
Chapter 1 Introduction  
Features  
Features  
1
The following list summarizes the key features of the LTO-2 Half-Height  
Tape Drives.  
Performance - Up to 26 Mbytes-per-second native transfer.  
13-Speed Transfer matches tape drive speed to that of the host and  
optimizes data transfers, resulting in shorter backup times and  
increased reliability.  
Two convenient form-factors:  
5¼-inch internal form-factor for installation in a 5¼-inch half-  
height space.  
External desktop form-factor.  
Intelligent data compression maximizes performance and capacity by  
analyzing compressibility prior to recording.  
Cartridge memory enables fast loading of cartridges and stores  
pertinent information about the media.  
32-Mbyte data buffer for extra fast backups on high-performance  
systems.  
Tape Alert drive performance monitoring and reporting.  
Third generation read channel for increased maturity and data  
integrity.  
Patented head positioner for increased data integrity.  
Shock dampened isolated chassis.  
Two levels of ECC for extra data safety and protection from errors.  
Reliable tape picking implementation for increased reliability.  
Custom-designed LSI circuitry for fast, efficient data processing.  
RISC processors for fast, efficient data processing.  
Supports a wide variety of UNIX platforms.  
2
LTO-2 Half-Height Tape Drive User’s Guide  
   
Chapter 2  
2Installation and Quick Start  
This chapter explains how to install the internal and desktop LTO-2  
Half-Height Tape Drives.  
Topics covered in this chapter are:  
LTO-2 Half-Height Tape Drive User’s Guide  
3
   
Chapter 2 Installation and Quick Start  
Quick Start Guide  
Quick Start Guide  
2
Use the following quick-start instructions to get your tape drive up and  
running as quickly as possible.  
Internal LTO-2  
Use the following procedure to install internal LTO-2 Half-Height Tape  
Half-Height Tape  
Drive Quick Start 2  
Drive. Print this page and check each step as you complete it. If you need  
more information about a step, turn to the section referenced in the step.  
1
Unpack the contents of your drive package, and check for damaged items.  
2
Review the drive’s default settings and change them if necessary:  
SCSI ID: 6  
Terminator Power: Disabled  
3
Turn off your computer, remove its covers and power cable, and select a mounting  
bay for the drive.  
4
5
6
7
8
9
Connect a SCSI interface cable to the drive.  
Terminate the SCSI bus if the internal tape drive is the last device on the SCSI bus.  
Connect a serial cable, if connecting the tape drive to a tape library.  
Connect a power cable to the drive.  
Replace the computer covers and power cable, turn on the computer, and verify  
that the internal tape drive is operating properly.  
Register your tape drive.  
4
LTO-2 Half-Height Tape Drive User’s Guide  
     
Chapter 2 Installation and Quick Start  
Quick Start Guide  
Desktop LTO-2  
Half-Height Tape  
Drive Quick Start 2  
Use the following procedure to install desktop LTO-2 Half-Height Tape  
Drive. Print this page and check each step as you complete it. If you need  
more information about a step, turn to the section referenced in the step.  
1
Unpack the contents of your drive package, and check for damaged items.  
2
Review the drive’s default settings and change them if necessary:  
SCSI ID: 6  
3
4
5
6
Connect a SCSI interface cable to the drive.  
Check the SCSI termination.  
Connect a power cable to the drive.  
• Turn on the computer  
• Turn on the desktop tape drive  
• Verify that the desktop tape drive is operating properly.  
7
Register your tape drive.  
LTO-2 Half-Height Tape Drive User’s Guide  
5
     
Chapter 2 Installation and Quick Start  
Unpacking and Inspection  
Unpacking and Inspection  
2
Although drives are inspected and carefully packaged at the factory,  
damage may occur during shipping. Follow these steps to unpack the  
drive.  
1 Visually inspect the shipping containers and notify your carrier  
immediately of any damage.  
2 Place shipping containers on a flat, clean, stable surface; then  
carefully remove the contents. If the equipment is damaged, notify  
your Quantum representative.  
3 Always save the containers and packing materials for any future  
reshipment.  
Internal Tape Drive Guidelines and Cautions  
2
The following guidelines and cautions apply to handling and installing  
internal tape drives. Keep them in mind as you install the drive.  
Handle the drive by the sides rather than by the top cover to reduce  
the risk of dropping the drive or damaging it during installation.  
Internal drives contain some exposed components that are sensitive  
to static electricity. To reduce the possibility of damage from static  
discharge, the drives are shipped in a protective antistatic bag. Do not  
remove the drive from the antistatic bag until you are ready to install  
it.  
Before you remove the drive from the antistatic bag, touch a metal or  
grounded surface to discharge any static electricity buildup from  
your body.  
Always lay the drive either on top of the antistatic bag or place it  
inside of the bag to reduce the chance of damage from static  
discharge.  
Install LVD drives only in an LVD environment. Do not mix LVD and  
HVD devices on the same SCSI bus.  
6
LTO-2 Half-Height Tape Drive User’s Guide  
       
Chapter 2 Installation and Quick Start  
Drive Installation Instructions  
Due to the speed of the LTO-2 Half-Height Tape Drive, it is  
recommended that a maximum of one LTO-2 drive be connected to  
one channel on a host SCSI adapter.  
Drive Installation Instructions  
2
After unpacking and inspecting your shipping containers and reviewing  
the installation guidelines and cautions, proceed to the appropriate  
section in this chapter for instructions on installing your internal or  
desktop LTO-2 Half- Height Tape Drive.  
Installing an Internal LTO-2 Half-Height Tape Drive  
2
Installing an internal LTO-2 Half-Height Tape Drive involves the  
following steps:  
Configuring the  
Before you install the LTO-2 Half-Height Tape Drive in your computer,  
Internal Tape Drive 2 you may need to configure the drive’s SCSI ID and terminator power  
features. The default configuration settings for the LTO-2 Half-Height  
Tape Drive are:  
LTO-2 Half-Height Tape Drive User’s Guide  
7
         
Chapter 2 Installation and Quick Start  
Installing an Internal LTO-2 Half-Height Tape Drive  
SCSI ID: 6  
Terminator power: disabled  
If you need to change these settings, refer to the following sections.  
SCSI ID  
2
Jumper Pins:  
1–2, 3–4, 5–6, 7–8  
Default Setting: SCSI ID 6  
Each SCSI device on the bus must have its own unique SCSI ID. The  
internal tape drive is shipped with a default SCSI ID of 6. If another SCSI  
device in the SCSI chain is using this ID, use jumper pins 1–2, 3–4, 5–6,  
and 7–8 to change the SCSI ID of the LTO-2 Half-Height Tape Drive (see  
figure 2 and table 1), or assign a unique SCSI ID to the other SCSI device.  
Note: The SCSI controller or host adapter generally uses ID 7. In  
some systems, the boot drive uses ID 0 or ID 1. Avoid setting  
your drive’s SCSI ID to these settings.  
8
LTO-2 Half-Height Tape Drive User’s Guide  
 
Chapter 2 Installation and Quick Start  
Installing an Internal LTO-2 Half-Height Tape Drive  
Figure 2 Internal  
LTO-2 Half-Height  
Tape Drive Jumper  
Settings  
Drive Configuration Jumper Pins  
Drive Configuration  
Jumper Pins  
Jumper Settings  
Default  
settings:  
SCSI ID=0  
SCSI ID=1  
SCSI ID=2  
SCSI ID=3  
SCSI ID=8  
SCSI ID=9  
SCSI ID=10  
SCSI ID=11  
SCSI ID=12  
SCSI ID=13  
SCSI ID=14  
SCSI ID=15  
Term. power  
Pins:  
Function:  
1-2 SCSI ID bit 0  
SCSI ID=4  
SCSI ID=5  
SCSI ID=6  
SCSI ID=7  
3-4 SCSI ID bit 1  
5-6 SCSI ID bit 2  
7-8 SCSI ID bit 3  
9-10  
Reserved  
11-12 Termination Power  
LTO-2 Half-Height Tape Drive User’s Guide  
9
   
Chapter 2 Installation and Quick Start  
Installing an Internal LTO-2 Half-Height Tape Drive  
Table 1 SCSI IDs and  
Jumpers  
Jumper Settings for  
LTO-2 Half-Height in  
Drive  
SCSI ID  
1–2  
3–4  
5–6  
7–8  
0
Open  
Open  
Open  
Open  
1
Shunted  
Open  
Open  
Open  
Open  
2
Shunted  
Shunted  
Open  
Open  
Open  
3
Shunted  
Open  
Open  
Open  
4
Shunted  
Shunted  
Shunted  
Shunted  
Open  
Open  
5
Shunted  
Open  
Open  
Open  
6 (default)  
Shunted  
Shunted  
Open  
Open  
7
Shunted  
Open  
Open  
8
Shunted  
Shunted  
Shunted  
Shunted  
Shunted  
Shunted  
Shunted  
Shunted  
9
Shunted  
Open  
Open  
Open  
10  
11  
12  
13  
14  
15  
Shunted  
Shunted  
Open  
Open  
Shunted  
Open  
Open  
Shunted  
Shunted  
Shunted  
Shunted  
Shunted  
Open  
Open  
Shunted  
Shunted  
Shunted  
Terminator Power  
2
By default, terminator power is disabled on the internal LTO-2  
Half-Height Tape Drive. To enable terminator power, place a jumper  
across pins 11 and 12.  
Note: The internal LTO-2 Half-Height Tape Drive does not provide  
SCSI termination. Thus, a terminator must be installed on the  
drive if it is the last device in a SCSI chain.  
10  
LTO-2 Half-Height Tape Drive User’s Guide  
     
Chapter 2 Installation and Quick Start  
Installing an Internal LTO-2 Half-Height Tape Drive  
Mounting the  
You can mount the internal LTO-2 Half-Height Tape Drive either  
Internal Tape Drive 2 horizontally or vertically (see figure 3).  
If you mount the drive vertically, the side of the drive should be  
within 5 degrees of horizontal.  
If you mount the drive horizontally, the base of the drive must be  
within 15 degrees of horizontal and the drive must be right-side up.  
Figure 3 Acceptable  
Mounting Orientation  
YES  
YES  
YES  
NO  
Mount the drive in a 5.25-inch, half-height drive bay and secure it using  
two M3.0 X 3 metric screws on each side of the drive.  
Caution: Do not use screws longer than 3 mm or you may damage  
the drive. Figure 4 shows the locations of the mounting-  
screw holes on the side and bottom of the drive,  
respectively.  
LTO-2 Half-Height Tape Drive User’s Guide  
11  
     
Chapter 2 Installation and Quick Start  
Installing an Internal LTO-2 Half-Height Tape Drive  
Figure 4 Internal LTO-  
2 Half-Height Tape  
Drive Mounting  
Dimensions  
INCLUDING CONNECTORS  
5.0  
BEZEL  
THICKNESS  
41.0 MAX  
(40.75 NOMINAL)  
2X M3.0 NEARSIDE  
2X M3.0 FARSIDE  
3X 5.0  
M3.0 x 2.5  
THIS HOLE  
10.0  
0.5  
47.4  
79.2  
52.9  
140.0  
146.0  
144.8  
4X M3.0 X 5.0  
2.4  
221.0  
12  
LTO-2 Half-Height Tape Drive User’s Guide  
 
Chapter 2 Installation and Quick Start  
Installing an Internal LTO-2 Half-Height Tape Drive  
Connecting a SCSI  
Cable  
The internal LTO-2 Half-Height Tape Drive has an Ultra3 SCSI interface,  
terminated by an LVD SCSI connector. Use the following procedure to  
connect a SCSI cable to this connector.  
2
1 Turn off all power to the drive and the computer.  
2 Attach the SCSI interface cable to the 68-pin SCSI interface connector  
on the back of the drive (see figure 5).  
Figure 5 Rear View of  
the Internal LTO-2  
Half-Height Tape Drive  
Library Interface Connector  
SCSI Jumper Block  
Pin 1  
SCSI Connector  
Power Connector  
Caution: Install an LVD drive only in an LVD environment.  
Plugging an LVD drive into an HVD bus makes the entire  
bus non-functional and may permanently damage the  
drive or other SCSI devices on the bus.  
LTO-2 Half-Height Tape Drive User’s Guide  
13  
     
Chapter 2 Installation and Quick Start  
Installing an Internal LTO-2 Half-Height Tape Drive  
Checking the SCSI  
Termination  
By default, the internal LTO-2 Half-Height Tape Drive does not provide  
2
SCSI termination. If you use this default setting, you must place a SCSI  
bus terminator or a SCSI device with termination enabled at the end of  
the SCSI chain. See figure 6 for two examples of SCSI termination.  
The internal LTO-2 Half-Height Tape Drive provides terminator power if  
a jumper is placed on the termination power jumper pins (see Terminator  
Figure 6 Two SCSI  
Termination Examples  
for the Internal LTO-2  
Half-Height Tape Drive  
SCSI device  
(termination  
enabled)  
SCSI Terminator  
Tape drive  
(no  
termination)  
Tape drive  
(no  
termination)  
SCSI device  
(termination  
disabled)  
CSI Controller  
mination enabled)  
SCSI Controlle  
(termination enab  
Connecting a  
Serial Cable for  
Tape Libraries  
The Internal LTO-2 Half-Height Tape Drive include an RS-422 serial  
interface for tape libraries. The LTO-2 library interface uses an in-line  
shrouded and keyed 10-pin connector. This connector is located on the  
lower left side of the back of the drive (see figure 5). Table 2 shows pin  
assignments.  
2
14  
LTO-2 Half-Height Tape Drive User’s Guide  
         
Chapter 2 Installation and Quick Start  
Installing an Internal LTO-2 Half-Height Tape Drive  
Table 2 Serial  
Interface Connector  
Pin Assignments  
Pin Numbers  
Description  
+Tx -Rx  
1
2
a
d
-Tx -Rx  
a
d
3
Ground  
-Tx -Rx  
4
a
a
5
+Tx -Rxa  
d
6
Sense  
d
a
7
Sense  
8
Reset  
a
9
Signal  
aux  
10  
Reserved  
Connecting a Power Attach a four-pin power cable to the power connector on the back of the  
Cable  
2
drive. Figure 5 shows the location of the power connector.  
The recommended 4-pin power connector for internal drives is an AMP  
1-48024-0 housing with AMP 60617-1 pins or equivalent.  
Installing the LTO  
Driver  
If you intend to use your drive with the Microsoft native backup applet  
on Windows Server 2003, Windows XP, or Microsoft Windows 2000  
operating system, install the appropriate LTO driver. See the Resource  
CD. This driver is not necessary with commercial backup application  
software.  
2
Registering Your  
Tape Drive  
After you install the internal tape drive, be sure to register it. Registering  
your drive ensures that you will receive the latest information about your  
drive, as well as other product, service, and support information. For  
your convenience, you can register your drive through our Web site at:  
2
LTO-2 Half-Height Tape Drive User’s Guide  
15  
             
Chapter 2 Installation and Quick Start  
Installing a Desktop LTO-2 Half-Height Tape Drive  
Installing a Desktop LTO-2 Half-Height Tape Drive  
2
The desktop LTO-2 Half-Height Tape Drive is a compact subsystem that  
connects to the host computer through a SCSI port. Installing a desktop  
drive involves the following steps:  
Setting the SCSI ID2 Each SCSI device on the bus must have its own unique SCSI ID. The  
desktop tape drive is shipped with a default SCSI ID of 6. Avoid setting  
drive ID to 7. If another SCSI device in the SCSI chain is already using this  
ID, either use the push-button switch on the back of the drive to change  
the drive’s SCSI ID or assign a unique SCSI ID to the other SCSI device.  
If you change the SCSI ID on the tape drive, turn off the tape drive before  
changing the SCSI ID. The change takes effect when you turn on the  
drive.  
Note: The SCSI controller or host adapter generally uses ID 7. In  
some systems, the boot drive uses ID 0 or ID 1. Avoid setting  
your drive’s SCSI ID to these settings.  
Connecting a SCSI  
Cable  
The desktop LTO-2 Half-Height Tape Drive has two 68-pin, shielded  
SCSI interface connectors (ANSI Alternative 2) on the rear panel. These  
connectors consist of two rows of ribbon contacts spaced 2.16 mm (0.085  
in) apart. Either connector can be used as a SCSI IN or SCSI OUT  
connection. This means you can use either connector to attach the drive to  
a host computer or to another SCSI device.  
2
1 Turn off all power to the drive and the computer.  
2 Attach the SCSI interface cable to one of the 68-pin SCSI interface  
connectors on the back of the drive.  
16  
LTO-2 Half-Height Tape Drive User’s Guide  
           
Chapter 2 Installation and Quick Start  
Installing a Desktop LTO-2 Half-Height Tape Drive  
Checking the SCSI  
Termination  
If the desktop LTO-2 Half-Height Tape Drive is the last or only device in  
a SCSI chain, install a 68-pin LVD terminating plug on the unused SCSI  
connector. See figure 7 for two SCSI termination examples.  
2
Note: Termination power is enabled as a default for desktop drives.  
External  
Figure 7 SCSI  
SCSI device  
Termination Examples  
for the Desktop LTO-2  
Half-Height Tape Drive  
SCSI terminators  
External  
External  
tape drive  
tape drive  
External  
SCSI device  
SCSI controller  
(termination disabled)  
Internal  
SCSI device  
SCSI controller  
(termination  
(termination enabled)  
enabled)  
Example 1: SCSI termination  
Example 2: SCSI termination  
in a system that has only  
external SCSI devices.  
in a system that has both  
internal and external SCSI  
devices.  
Connecting a Power Attach the power cord securely to the power connector on the back of the  
Cord  
2
desktop LTO-2 Half-Height Tape Drive.  
Installing the LTO  
Driver  
If you intend to use your drive with either the Microsoft Windows Server  
2003, Windows XP, or Microsoft Windows 2000 operating system, install  
the LTO driver. See the Resource CD. This driver is not necessary with  
commercial backup application software.  
2
LTO-2 Half-Height Tape Drive User’s Guide  
17  
             
Chapter 2 Installation and Quick Start  
Installing a Desktop LTO-2 Half-Height Tape Drive  
Registering Your  
Tape Drive  
After you install the desktop tape drive, be sure to register it. Registering  
2
your drive ensures that you will receive the latest information about your  
drive, as well as other product, service, and support information. For  
your convenience, you can register your drive through our Web site at:  
18  
LTO-2 Half-Height Tape Drive User’s Guide  
   
Chapter 3  
3Operation  
This chapter describes how to operate the LTO-2 Half-Height Tape Drive.  
Topics covered in this chapter are:  
LTO-2 Half-Height Tape Drive User’s Guide  
19  
   
Chapter 3 Operation  
Understanding the Front Panel Display  
Understanding the Front Panel Display  
3
Figure 8 shows a generalized view of the LTO-2 Half-Height Tape Drive  
front-panel display.  
Figure 8 Generic  
Front Panel Display  
Power LED  
Activity LED  
Error LED  
Status LED  
Tape Load/Unload  
Button  
All drives have four LEDs on the front panel. The LED colors and  
functions are as follows:  
Power LED (green)  
Activity LED (green)  
Error LED (orange)  
Status LED (amber)  
The Activity, Error, and Status LEDs blink or go on to indicate information  
about the tape drive, see Blink Codes.  
20  
LTO-2 Half-Height Tape Drive User’s Guide  
     
Chapter 3 Operation  
Blink Codes  
Blink Codes  
3
Table 3 below summarizes the blink codes for the LTO-2 Half-Height  
Tape Drives.  
Table 3 LTO-2 Tape  
Drive Blink Codes  
ActivityLED Error LED  
Status LED  
(Amber)  
Drive Condition  
(Green)  
(Orange)  
Cleaning Request  
Hardware error  
ON  
Fast  
Positioning – loading, Slow  
unloading,rewinding,  
spacing, or locating  
Tape Active – writing, Slow  
reading, or verifying  
Manual intervention  
required  
ON  
Power On Self Test  
(POST) failure  
Fast  
ON  
ON  
Fast  
Cleaning cartridge  
present  
ON  
ON  
Cleaning cartridge at  
EOT  
Servo initialization  
Slow  
Slow  
Slow  
Slow  
Power On Self Test  
(POST) in progress  
Slow  
Fast  
Cleaning failure or  
media error  
Fast  
Microcode download  
Fast  
Fast  
Slow  
Fast  
Fast  
Fast  
Microcode download  
error  
LTO-2 Half-Height Tape Drive User’s Guide  
21  
       
Chapter 3 Operation  
Using LTO Cartridges  
Note:  
ON refers to a constant light  
Slow refers to a blink rate of 1/2 second on, 1/2 second off  
Fast refers to a blink rate of 1/8 second on, 1/8 second off.  
Using LTO Cartridges  
3
Loading a  
Cartridge  
To load an Ultrium cartridge into the LTO-2 Half-Height Tape Drive,  
place the cartridge in the slot and then do one of the following:  
3
Continue to push the cartridge the rest of the way into the drive.  
Press the load/unload button on the front of the drive to seat the  
cartridge.  
Use a library or host command to finish loading the tape.  
Unloading a  
Cartridge  
To unload an Ultrium cartridge from the LTO-2 Half-Height Tape Drive,  
either:  
3
Use a library or host command to unload the tape, or  
Push the load/unload button on the front of the drive.  
Caution: Several seconds may elapse between the time you press  
the load/unload button and the time the cartridge is  
ejected. Do not power down the tape drive or the host  
computer until the drive has completely ejected the  
cartridge.  
Write-protecting a  
Ultrium cartridges have a sliding write-protect switch near the back right  
corner of the cartridge, see figure 9.  
Cartridge  
3
If you slide the switch toward the center of the cartridge, data can be  
read from the cartridge but not written to it.  
22  
LTO-2 Half-Height Tape Drive User’s Guide  
             
Chapter 3 Operation  
Using LTO Cartridges  
If you slide the switch all the way toward the corner (see figure 9),  
data can be read from and written to the cartridge.  
Note: LTO cartridges have prewritten servo patterns and should not  
be bulk erased.  
Figure 9 Ultrium  
Cartridge Showing  
Write-Protect Switch  
Write-  
protect  
switch  
(unlocked)  
Locked  
Unlocked  
Cartridge Care and  
To protect the data on your Ultrium data cartridges, observe the  
following precautions:  
Maintenance  
3
Always remove the cartridge from the drive when not in use and  
store it in its protective case.  
Do not expose cartridges to dirt, dust or moisture.  
Do not touch the tape media within a cartridge.  
Do not use data cartridges outside the specified operating conditions:  
o
o
10 C to 40 C, 10% to 80% relative humidity.  
If a data cartridge has been exposed to temperature or humidity changes  
within the limits listed above, allow the tape cartridge to acclimate to its  
surroundings for at least one hour before use. Then retension the tape to  
allow the tape pack to become stable for better performance.  
LTO-2 Half-Height Tape Drive User’s Guide  
23  
     
Chapter 3 Operation  
Drive Maintenance  
Retensioning the Tape  
3
If, during storage and/or transportation, a data cartridge has been  
exposed to conditions outside the above range, it must be conditioned  
before use in the operating environment. The conditioning process  
requires exposure to the operating environment for a time equal to, or  
greater than, the time away from the operating environment, up to a  
maximum of 24 hours.  
Keep the cartridge away from direct sunlight and heat sources, such  
as radiators, heaters, or warm air ducts.  
Keep the cartridge away from sources of electromagnetic fields, such  
as telephones, computer monitors, dictation equipment, mechanical  
or printing calculators, motors, magnetic tools, and bulk erasers.  
Avoid dropping the cartridges.  
This can damage components inside the cartridge, possibly rendering  
the tape unusable. If a tape is dropped it is advisable to open the  
cartridge door and make sure that the leader pin is in the correct  
position. A dropped cartridge should be retensioned before use.  
Do not bulk erase Ultrium cartridges.  
Bulk-erased cartridges cannot be reformatted by the tape drive and  
will be rendered unusable.  
Drive Maintenance  
3
The Ultrium drive requires little or no maintenance. However, the drive  
mechanism may need to be cleaned.  
Cleaning the Tape  
Excessive tape debris or other material may accumulate on the tape heads  
if the drive is used with non-approved media or operated in a hot, dusty  
environment. In this case, the drive may experience excessive errors  
while reading or writing, and the amber Status LED remains on  
continuously during operation. This means that the drive heads need to  
be cleaned.  
Drive  
3
24  
LTO-2 Half-Height Tape Drive User’s Guide  
     
Chapter 3 Operation  
Drive Maintenance  
The LTO cleaning cartridge has the same dimensions as the data  
cartridge and contains an LTO-CM (Cartridge Memory), but is loaded  
with cleaning media instead of recording media. Always keep the  
cleaning cartridge in its protective case when not in use.  
To clean the drive, insert an LTO Ultrium cleaning cartridge. During the  
cleaning process, both the Status and Drive LEDs remain lit. After the  
cleaning process is completed, the cartridge may be ejected automatically,  
or you may need to press the load/unload button to remove the  
cartridge, depending on the drive configuration. Each time you use the  
cleaning cartridge, write the date on the label for future reference.  
Note: If the Status LED comes on continuously within 24 hours after  
a cleaning cycle, perform the cleaning cycle again. If, after  
three cleaning cycles in a 72-hour period, the Status LED lights  
up again, contact Technical Support.  
Each time the drive is cleaned, the tape advances to a new, unused  
section of media. After approximately 50 cleanings, all of the media will  
be used up and you should discard the cleaning cartridge. When a  
cleaning cartridge is used up, the amber Status LED flashes, while the  
green Drive LED remains on. Do not reuse a spent cleaning cartridge  
Note: The cleaning procedure will not run and the cleaning cartridge  
will be ejected in the following circumstances:  
The drive does not recognize the cartridge as an LTO  
cleaning cartridge.  
All of the tape on the cleaning cartridge has been used up  
(at EOT). In this case, the Status LED will flash rapidly  
while the Drive LED remains on.  
LTO-2 Half-Height Tape Drive User’s Guide  
25  
Chapter 3 Operation  
Drive Maintenance  
26  
LTO-2 Half-Height Tape Drive User’s Guide  
Chapter 4  
4Theory  
This chapter describes operational theories used in the LTO-2  
Half-Height Tape Drive.  
The topics covered in this chapter are:  
Track Layout  
4
With the LTO-2 Half-Height Tape Drive, there are 512 data tracks on the  
LTO tape, numbered 0 through 511.  
Data track 511 is the track closest to the bottom edge of the tape (the  
reference edge).  
The area between adjacent servo bands is a data band.  
LTO-2 Half-Height Tape Drive User’s Guide  
27  
       
Chapter 4 Theory  
Track Layout  
There are 4 data bands, each of which includes 128 data tracks.  
The data bands are numbered 2,0,1,3. Data band 2 is closest to the  
bottom edge of the tape.  
A track group should it be: is a set of 16 data tracks that record  
concurrently. The sets of 16 data tracks in a data band are data sub bands.  
There are 8 data sub bands per data band. The data tracks are accessed in  
a serpentine manner.  
A wrap is a track group recorded in the physical forward or physical  
reverse direction. The wraps are recorded in a serpentine fashion starting  
in data band 0. The tape contains 64 track groups, 32 written in the  
forward direction and 32 written in the reverse direction. Even-numbered  
wraps are recorded in the forward direction (BOT to EOT), and odd-  
numbered wraps are recorded in the reverse direction (EOT to BOT).  
Figure 10 shows the layout of data on an LTO tape.  
Figure 10 Layout of  
Tracks on LTO Ultrium  
Tapes  
Tape edge  
Servo band  
0
5
Even # wrap  
Sub band 0  
Odd # wrap  
Sub bands 1 through 6  
Beginning of  
tape (BOT)  
End of  
tape (EOT)  
(not shown)  
DATA  
BAND  
Even # wrap  
Sub band 7  
Odd # wrap  
0
5
Servo band  
Tape edge  
28  
LTO-2 Half-Height Tape Drive User’s Guide  
 
Chapter 4 Theory  
Recording Method  
Recording Method  
4
The LTO-2 Half-Height Tape Drive records data using write-equalized  
(1,7) Run Length Limited (RLL) code. RLL (1,7) Data bits are defined as  
follows:  
A ONE is represented by a flux transition at the center of a bit-cell.  
A ZERO is represented by no flux transition in the bit-cell.  
Data Buffer  
4
In their default configuration, the LTO-2 Half-Height Tape Drive has a  
32-Mbyte buffer. The buffer controller has a burst transfer rate of 320  
Mbytes/sec. The high bandwidth is needed to support look-aside data  
compression in the case of compressible data being transferred from SCSI  
at 160 Mbytes/sec.  
Data Integrity  
4
The mechanical and electrical design of the drives ensures that drive  
performance does not degrade over a drive’s operating life. Changes in  
head alignment, head wear, component drift, and other factors are  
minimized to ensure that data integrity and interchange capability are  
not compromised over the drive's operating life.  
The error rate of the LTO-2 Half-Height Tape Drive is less than 1 hard  
17  
27  
error in 10 bits. The drive’s undetectable error rate is 1 in 10 bits read.  
Error-correction  
Code (ECC)  
The use of Cyclic Redundancy Checking (CRC), two-level orthogonal  
Error Correction Coding (ECC) provides a very low probability of  
encountering a hard error. During the read process, ECC correction is  
performed on the fly without affecting tape streaming.  
4
LTO-2 Half-Height Tape Drive User’s Guide  
29  
               
Chapter 4 Theory  
Data Integrity  
There are two levels of Error Correction Coding (ECC). These two levels  
are orthogonal — that is, an ECC codeword at one level intersects ECC  
codewords at the other level just once, which means there will be only  
one common symbol between them. The two levels are called C1 and C2.  
C1 ECC  
4
As data is written to memory from the Data Processing unit, the DMA /  
ECC interface generates C1 ECC bytes and writes them to memory.  
As data is written to tape, the C1 ECC is checked and an interrupt  
generated if there is an error. The C1 ECC read from memory is the ECC  
that is written to tape.  
When data is read from tape and stored into memory, C1 ECC is checked.  
If the C1 ECC is good, that codeword pair’s “Valid” bit is set.  
Otherwise, a pointer to the invalid Codeword Pair is passed to the C1  
ECC correction engine.  
If the C1 ECC correction engine can correct the error, then the  
corrected bytes are written to memory, and the Valid bit is set.  
Otherwise, the Valid bit is left cleared.  
As data is read from memory to the Data Processor for decompression,  
the C1 ECC is again checked and an interrupt generated if it is not correct.  
C2 ECC  
4
C2 ECC involves three distinct operations:  
1 Encoding: Generating C2 ECC bytes from data bytes (performed by  
ECC co-processor hardware)  
2 Decoding: Generating ECC syndromes from data and ECC bytes,  
testing for all-zeroes (performed by ECC co-processor hardware)  
3 Correction: Generating corrected data from syndromes.  
The correction depends on the number and types of errors involved:  
For one known C1 codeword pair in error in a sub-data set (C2  
codeword), the operation is performed by the ECC co-processor  
hardware.  
30  
LTO-2 Half-Height Tape Drive User’s Guide  
Chapter 4 Theory  
Data Compression  
For two or more known C1 codeword pairs in error, the matrix is  
computed by firmware and the correction is performed by hardware.  
For one or more unknown C1 codeword pairs, syndromes are  
generated by hardware, error location is computed by firmware, the  
matrix is computed by firmware and the correction is performed by  
hardware.  
Servo-tracking  
Faults  
During a write operation, if the servo system detects an error that may  
result in adjacent data tracks being over-written, the write operation is  
aborted. The write operation will not continue until the correct servo  
tracking is re-established.  
4
Data Compression  
4
Typical data streams of text, graphics, software code, or other forms of  
data contain repeated information of some sort, whether it is at the text  
level where you can readily recognize regular repetitions of a single  
word, or at the binary level where the repetitions are in bits or bytes.  
Although most data is unique and random, the binary level data exhibits  
patterns of various sizes that repeat with varying degrees of regularity.  
Storage efficiency is increased if the redundancies or repetition in the  
data are removed before the data is recorded to tape. Data compression  
technology significantly reduces or eliminates redundancies in data  
before recording the information to tape. This increases the amount of  
data that can be stored on a finite medium and increases the overall  
storage efficiency of the system.  
With data compression, the redundant information in a data stream is  
identified and represented by codewords or symbols, which allow the  
same data to be recorded in a fewer number of bits. These codewords or  
symbols point back to the original data string, using fewer characters to  
represent the strings. Because these smaller symbols are substituted for  
the longer strings of data, more data can be stored in the same physical  
space.  
Some important benefits result from data compression in tape drives:  
LTO-2 Half-Height Tape Drive User’s Guide  
31  
       
Chapter 4 Theory  
Data Compression  
The same amount of information can be stored on a smaller length of  
tape.  
More data can be stored on a given length of tape.  
Performance can more closely parallel to that of high-transfer-rate  
computers.  
More information can be transferred in the same time interval.  
Data Compression  
In an effective data-compression method, several factors are important:  
Considerations 4  
The amount of compression. The amount of compression is measured  
by the compression ratio. This ratio compares the amount of  
uncompressed data to the amount of compressed data. It is obtained  
by dividing the size of the uncompressed data by the size of the  
compressed data)  
The speed with which data is compressed and decompressed relative  
to the host transfer rate.  
The types of data to be compressed.  
The data integrity of the compressed data.  
The amount of compression possible in a data stream depends on factors  
such as:  
Data pattern  
Compression algorithm  
Pattern repetition length  
Pattern repetition frequency  
Object size (block of information to be compressed)  
Starting pattern chosen  
The transfer rate depends on factors such as:  
Compression ratio  
Drive buffer size  
Host computer input/output (I/O) speed  
Effective disc speeds of the host computer  
Record lengths that the host computer transmits  
32  
LTO-2 Half-Height Tape Drive User’s Guide  
   
Chapter 4 Theory  
Data Compression  
Data compression algorithms can be tailored to provide maximum  
compression for specific types of data. Because varying types of data are  
encountered in normal day-to-day operating circumstances, however, an  
effective data compression method for a tape drive must serve various  
data types. Additionally, the data compression method must adapt to  
different data types, automatically providing optimum handling for all  
types of data.  
Intelligent Data  
Compression  
The tape’s compressed capacity is maximized through the use of  
intelligent data compression. The intelligent data compression hardware  
determines the compressibility of each record. If the size of the record is  
larger after a compression attempt than the native (uncompressed) size,  
then the record is written in its native form.  
4
The intelligent data compression utilizes two compression schemes:  
Scheme-1 is a LZ1 based compression scheme using a history buffer  
to achieve data compression.  
Scheme-2 is a pass-through compression scheme designed to pass  
uncompressible data through with minimal expansion.  
There are three specific requirements for compliance with the LTO  
specification.  
The output data stream must be decompressible following LTO rules  
to create the input sequence of records and File Marks perfectly.  
An LTO compressed data stream may not contain any of the eight  
reserved Control Symbols.  
While control symbols allow switching to Scheme 2, this should  
never be used by operational software because this capability is only  
for diagnostic and testing purposes.  
Software data compression should never be used because the LTO-2  
Half-Height Tape Drive's built-in intelligent data compression is much  
more efficient than software data compression systems.  
The LTO-2 Half-Height Tape Drive uses a derivative of ALDC-2 lossless  
data compression that includes additional control codes for intelligent  
data compression.  
LTO-2 Half-Height Tape Drive User’s Guide  
33  
   
Chapter 4 Theory  
Data Compression  
34  
LTO-2 Half-Height Tape Drive User’s Guide  
Chapter 5  
5Specifications  
This chapter provides technical specifications for the LTO-2 Half-Height  
Tape Drive.  
The topics covered in this chapter are:  
LTO-2 Half-Height Tape Drive User’s Guide  
35  
   
Chapter 5 Specifications  
Physical Specifications  
Physical Specifications  
5
Table 4 below lists the physical specifications of the LTO-2 Half-Height  
Tape Drive.  
Table 4 Physical  
Specifications  
Internal SCSI Drive  
without Bezel  
Internal SCSI Drive  
with Bezel  
Specification  
Height  
1.6 inches  
(41.0 mm) max  
1.69 inches  
(43.1 mm +/- 0.3 mm)  
Width  
5.75 inches  
(146.05 ± 0.25)  
5.81 inches  
(147.8 mm +/- 0.3 mm)  
Length  
8.74 inches  
(222 mm)  
8.93 inches  
(227 mm) max  
(less connector)  
Weight  
3.660 lb.  
(1.66 kg)  
3.715 lb.  
(1.685 kg)  
Figure 11 shows the dimensions of the internal LTO--2 half-height drive.  
36  
LTO-2 Half-Height Tape Drive User’s Guide  
     
Chapter 5 Specifications  
Physical Specifications  
Figure 11 Internal  
LTO-2 Half-Height  
Tape Drive  
Dimensions  
226.5  
OVERALL LENGTH  
INCLUDING CONNECTORS  
5.0  
BEZEL  
THICKNESS  
41.0 MAX  
(40.75 NOMINAL)  
2X M3.0 NEARSIDE  
2X M3.0 FARSIDE  
3X 5.0  
M3.0 x 2.5  
THIS HOLE  
10.0  
0.5  
47.4  
79.2  
52.9  
140.0  
146.0  
144.8  
LTO-2 Half-Height Tape Drive User’s Guide  
37  
 
Chapter 5 Specifications  
Power Specifications  
Power Specifications  
5
The desktop LTO-2 Half-Height Tape Drive comes with a built-in 90-  
260VAC (47-63 Hz) automatic switching power supply.  
Maximum voltage and power specifications for the internal LTO-2  
Half-Height Tape Drive are listed in table 5 and table 6.  
Table 5 Voltage and  
Current  
Specification  
+12 VDC  
+ 5VDC  
(1)  
DC Voltage Tolerance  
12.00 + or – 10% 5.00 + or – 5%  
Non-operating max voltage 14 Volts peak  
7 Volts peak  
(1)  
Idle current  
0.13 amps RMS  
0.45 amps RMS  
0.71 amps RMS  
0.83 amps RMS  
1.4 amps RMS  
(2)  
Standby current (max)  
1.4 amps RMS*  
2.9 amps RMS  
(3)  
Typical operating current  
(4)  
Max operating current  
3.0 amps max RMS  
3.0 amps max RMS  
Max. Peak operating  
2.34 amps  
(1 sec max)  
(5)  
current  
Ripple (peak-to-peak)  
< 100 mV  
< 100 mV  
* RMS parameters measured at the power connector using a true RMS  
digital meter.  
Table 6 Power  
Dissipation  
Specification  
LTO-2  
(1)  
Idle Power  
9 watts RMS  
(2)  
Standby Power  
12.5 watts RMS*  
23 watts RMS  
(3)  
Typical Operating Power  
38  
LTO-2 Half-Height Tape Drive User’s Guide  
       
Chapter 5 Specifications  
Drive Performance Specifications  
Specification  
LTO-2  
(4)  
Max Continuous Operating Power  
25 watts RMS*  
(5)  
Max Peak Operating Power  
40 watts RMS (1 sec max)  
(1)  
Note:  
No cartridge loaded (typical drive idle current/power)  
Cartridge loaded and tape-threaded -- drive ready for  
(2)  
transfer (typical drive standby current/power)  
(3)  
Average drive current/power measured during Read/Write  
mode at 4.53 m/s on a typical drive.  
(4)  
Maximum drive current measured during Read/Write mode  
at 4.53 m/s. Worst case 1 second RMS measurement. Measured  
at the following worst case voltages (5.25V and 10.8V).  
(5)  
Peak current/power, RMS current measured for maximum  
current do not occur at the same time max current condition.  
(1-5)  
RMS parameters measured at the power connector using a  
nominal voltages of 5.0V and 12.0V unless stated otherwise.  
Drive Performance Specifications  
5
Table 7 lists the performance specifications for the LTO-2 Half-Height  
Tape Drive.  
LTO-2 Half-Height Tape Drive User’s Guide  
39  
   
Chapter 5 Specifications  
Drive Performance Specifications  
Table 7 Drive  
Performance  
Specification  
Specification  
Value  
Capacity  
LTO-2 (609 m)  
200 Gbytes (native)  
100 Gbytes (native)  
50 Gbytes (native)  
30 Gbytes (native)  
10 Gbytes (native)  
Ultrium type A (609 m)  
Ultrium type B (319 m)  
Ultrium type C (203 m)  
Ultrium type D (87 m)  
Recording density  
Flux density  
3,930 RLL-encoded ONEs per mm  
3,660 flux transitions per mm  
3 tracks per mm  
Track density  
Error recovery  
Read-after-write Reed Solomon ECC (2 levels)  
17  
Recording unrecoverable errors  
Recording undetectable errors  
Tape drive type  
<1 in 10 data bits  
27  
< 1 in 10 data bits  
LTO-2 (Ultrium)  
Head configuration  
16 thin-film write heads  
16 MR read heads  
4 MR servo heads  
During operation 8 write heads, 8 read heads, and  
2 servo heads are active at the same time  
Recording format  
Ultrium 8-channel (U-28)  
0, 13/11 RLL  
Recording method  
Transfer rate (sustained)  
Cartridge unload time  
20 Mbytes/second (max, native)  
3 seconds  
40  
LTO-2 Half-Height Tape Drive User’s Guide  
 
Chapter 5 Specifications  
Environmental Requirements  
Specification  
Value  
Average rewind time (609-m tape)  
Maximum rewind time (609-m tape)  
> 4.5 seconds  
<136 seconds  
68 seconds  
Average data access time (609-m tape)  
from BOW  
Maximum data access time (609-m tape)  
from BOW  
136 seconds  
Average rewind time (609-m tape)  
Tape speed  
< 76 seconds  
Up to 3.48 meters per second  
Environmental Requirements  
5
Table 8 lists the environmental specifications for the LTO-2 Half-Height  
Tape Drive.  
Table 8 Environmental  
Requirements  
Specification  
Operational  
Non-operational  
Temperature  
+50° to +104°F  
(+10° to + 40°C)  
–40° to +149°F  
(–40° to + 66°C)  
Airflow requirements  
Thermal gradient  
Relative humidity  
Internal: 9 CFM (front to back)  
11°C per hour (10-40°C)  
N/A  
11°C per hour (10-40°C)  
20% to 80% non-condensing  
10% to 95% non-  
condensing  
Humidity gradient  
10% per hour  
10% per hour  
LTO-2 Half-Height Tape Drive User’s Guide  
41  
     
Chapter 5 Specifications  
Reliability  
Specification  
Operational  
Non-operational  
Altitude  
max 10,000 feet MSL (at 25°C)  
10 Gs peak, 11 msec  
40,000 feet (power off)  
25 Gs peak, 11 msec  
Shock (1/2 sine wave)  
Vibration (sweep test)  
0.005 inches DA (5-43 Hz) 0.20 G  
peak (43–1000 Hz) sweep rate 5-  
1000Hz;  
0.1 inches DA (5-15 Hz)  
1.0 G peak (15–500 Hz)  
sweep rate 5-500Hz;  
(1.0 octave per minute)  
(1.0 octave per minute)  
Acoustic level idling  
(A-wt sum)  
52 dBA maximum 5.0 LwA Bels  
57 dBA maximum 5.5 LwA Bels  
Acoustic level operational  
(A-wt sum)  
Injected Noise  
5
The internal drive operates without degradation of error rates with 100  
mV of noise injected between the chassis and 0 V at the power connector  
at any frequency between 45 Hz and 20 MHz.  
Reliability  
5
The LTO-2 Half-Height Tape Drive is designed for maximum reliability  
and data integrity. Table 9 summarizes the reliability specifications.  
42  
LTO-2 Half-Height Tape Drive User’s Guide  
       
Chapter 5 Specifications  
Mean Time Between Failures  
Table 9 Reliability  
Specification  
Description  
17  
Non-recoverable error rate < 1 in 10 bits  
Error recovery and control • Error correction code techniques (C1  
and C2 ECC)  
• Read-after-write (RAW)  
• Error monitoring and reporting (error  
log)  
• Retry on  
Mean time between  
failures (MTBF)  
250,000 hours MTBF at 100% duty cycle:  
power applied and tape moving  
continuously  
(Desktop drive; 50,000 hours at full load  
and 25°C)  
Cartridge load/unload  
100,000 cartridge load/unload cycles (no  
thread)  
Mean time to replace  
(MTTR)  
Less than 30 minutes  
Mean Time Between Failures  
5
The mean time between failures (MTBF) for the internal drive is specified  
at 250,000 hours minimum. This specification includes all power-on and  
operational time but excludes maintenance periods. Operational time is  
assumed to be 100 percent of the power-on time. Operational time is the  
time the tape is loaded.  
The MTBF for the desktop drive power supply is 50,000 hours with the  
unit operated at full load and 25°C.  
Note: The MTBF rating does not represent any particular drive, but  
is derived from a large database of test samples. Actual rates  
may vary from unit to unit.  
LTO-2 Half-Height Tape Drive User’s Guide  
43  
     
Chapter 5 Specifications  
LTO Cartridge Specifications  
Mean Time to  
Replace  
The mean time to replace (MTTR) is the average time required by a  
qualified service technician to diagnose a defective drive and to install a  
replacement drive. The MTTR for LTO products is less than 0.5 hour (30  
minutes).  
5
The Quantum LTO drives are field-replaceable units. If a problem occurs  
with a subassembly or component in the drive, you should replace the  
entire unit. Return the drive to the factory in its original packaging.  
Contact your distributor, dealer, your computer system company or your  
Quantum sales representative to arrange the return.  
LTO Cartridge Specifications  
5
Environmental  
Considerations  
Table 10 lists the basic environmental tolerances for LTO Ultrium  
cartridges.  
5
Table 10 Environmental  
Tolerances  
Specification  
Value  
Operating temperature  
Relative humidity  
10°C to 40°C  
20% to 80%  
26° C max  
Wet bulb temperature  
Max localized temperature-permanent tape damage > 52°C  
If during storage and/or transportation a cartridge has been exposed to  
conditions outside the above values, it must be conditioned before use in  
the operating environment. The conditioning shall be exposure to the  
operating environment for a time equal to, or greater than, the time away  
from the operating environment, up to a maximum of 24 hours. There  
shall be no deposit of moisture anywhere on or in the cartridge.  
The stray magnetic field at any point on the tape shall not exceed  
4000 A/m.  
44  
LTO-2 Half-Height Tape Drive User’s Guide  
         
Chapter 5 Specifications  
Regulatory Compliance  
Cartridge Memory 5 Each Ultrium cartridge has 4 Kbytes of nonvolatile memory: 3 Kbytes are  
used to store tape-directory and hardware specific information. 1 Kbyte is  
available for application and OEM use. The cartridge memory is  
powered, read, and written to via a radio-frequency link.  
Cartridge  
Reliability  
Recommended cartridge use: After 5,000 load/unload cycles, replace the  
cartridge to ensure data integrity.  
5
See chapter 3, Operation for additional cartridge information and  
illustrations.  
Regulatory Compliance  
5
These drives comply with the safety and EMC regulations listed in the  
following tables.  
Safety Compliance 5  
Country  
Regulatory Organization  
Compliant to:  
United States  
Canada  
Canadian Standards Association  
(CSA)  
UL/CSA 60950-1  
Mexico  
Normas Oficiales Mexicanas  
(NOM), similar to UL  
NOM standards  
EU member nations  
Comité Europèen de  
Normalisation Electrotechnique –  
the European Committee for  
Electrotechnical Standardization  
(CENELEC)  
LTO-2 Half-Height Tape Drive User’s Guide  
45  
         
Chapter 5 Specifications  
Regulatory Compliance  
Country  
Regulatory Organization  
Compliant to:  
Member nations of  
IECEE*  
IECEE* International  
CB Scheme per IEC 60950-1 with  
details and exceptions for each  
member country  
Electrotechnical Commission on  
Electrical Equipment (IECEE) for  
Mutual Recognition of Test  
Certificates for Electrical  
Equipment “CB Scheme”  
Singapore  
South Korea  
Argentina  
Productivity and Standards Board PSB safety certification  
(PSB)  
CB Scheme  
JEON  
JEON safety certification  
CB Scheme  
Instituto Argentino de  
Racionalization de Materiales  
(IRAM)  
IRAM safety certification  
CB Scheme  
China  
CCC safety certification  
CB Scheme  
Malaysia  
Thailand  
India  
JBE SIRIM  
TISI  
CB Scheme  
CB Scheme  
STQC BIS  
SABS  
South Africa  
Israel  
CB Scheme  
CB Scheme  
SII  
* Member nations of the IECEE include Austria, Australia, Belgium,  
Canada, China (PR), Czech Republic, Denmark, Finland, France,  
Germany, Hungary, India, Ireland, Israel, Italy, Japan, (South) Korea,  
Netherlands, Norway, Poland, Russian Federation, Singapore, Slovakia,  
Slovenia, South Africa, Spain, Switzerland, United Kingdom, USA,  
Yugoslavia.  
46  
LTO-2 Half-Height Tape Drive User’s Guide  
Chapter 5 Specifications  
Regulatory Compliance  
EMC Compliance 5  
Country  
Regulatory Organization  
Compliant to:  
United States  
Federal Communications  
Commission (FCC)  
Title 47: Code of Federal  
Regulations, Part 15, Subpart B,  
Class B: Digital Device  
(47CFR15B)  
Canada  
Industry Canada Digital  
Apparaus - Interference-Causing Apparatus  
Equipment Standard (ICES-003)  
ICES-003 Class B: Digital  
EU member nations  
CE  
Emissions per CISPR 22, EN55022  
and Immunity per CISPR 24,  
EN55024  
Australia and New  
Zealand  
Standards Australia Spectrum  
Management “C-Tick”  
AS/NZS 3548 (same as CISPR 22)  
Japan  
Voluntary Control Council for  
Interface (VCCI)  
This is a voluntary compliance  
standard; the drives meet it via  
CE/EMC compliance  
South Korea  
Taiwan  
Radio Research Lab of Korea  
(RRL)  
RRL EMC certification  
Bureau of Commodity  
Inspection and Quarantine  
(BSMI)  
BSMI EMC certification  
China  
Russia  
Israel  
CNCA  
CCC Mark  
GOSSTANDART (GOST)  
SII  
CISPR-22, Class B  
CISPR-22, Class B  
Note: Use these drives only in equipment where the combination has  
been determined to be suitable by an appropriate certification  
organization (for example, Underwriters Laboratories Inc. or  
the Canadian Standards Association in North America).  
LTO-2 Half-Height Tape Drive User’s Guide  
47  
 
Chapter 5 Specifications  
Disposal of Electrical and Electronic Equipment  
You should also consider the following safety points:  
Install the drive in an enclosure that limits the user’s access to live  
parts, gives adequate system stability and provides the necessary  
grounding for the drive.  
Provide the correct voltages (+5 VDC and +12 VDC) based on the  
regulation applied—Extra Low Voltage (SEC) for UL and CSA, and  
Safety Extra Low Voltage for BSI and VDE (if applicable).  
Disposal of Electrical and Electronic Equipment  
5
This symbol on the product or on its  
packaging indicates that this product  
should not be disposed of with your other  
waste. Instead, it should be handed over to  
a designated collection point for the  
recycling of electrical and electronic  
equipment. The separate collection and  
recycling of your waste equipment at the time of disposal  
will help to conserve natural resources and ensure that it is  
recycled in a manner that protects human health and the  
environment. For more information about where you can  
drop off your waste equipment for recycling, please visit  
our website at: http://qcare.quantum.com or contact your  
local government authority, your household waste disposal  
service or the business from which you purchased the  
product.  
48  
LTO-2 Half-Height Tape Drive User’s Guide  
 
Chapter 6  
6UNIX Settings  
This chapter describes how to configure various UNIX systems to  
recognize and obtain optimal performance from the LTO-2 Half-Height  
Tape Drive.  
The topics covered in this chapter are:  
LTO-2 Half-Height Tape Drive User’s Guide  
49  
   
Chapter 6 UNIX Settings  
A Word About SCSI Controllers  
A Word About SCSI Controllers  
6
The LTO-2 Half-Height Tape Drive transfers data at 40Mbytes per  
second, with 2:1 compression of the data. The drive supports the SCSI  
Ultra3 specification and can transfer data at burst rates of up to 160  
Mbytes per second. To achieve maximum drive performance, it is  
important to choose high-performance disk drives for your system, as  
well as high performance SCSI controllers. Table 11 lists the types of SCSI  
controllers that Quantum recommends, in order of least preferred to most  
preferred (top to bottom).  
Table 11 SCSI  
Controllers  
Controller Type  
Maximum Transfer Rate  
Wide Ultra2 SCSI  
Ultra 3 SCSI  
80 Mbytes per second, compatible  
160 Mbytes per second, minimum preferred  
320 Mbytes per second  
Ultra 320 SCSI  
For definitions of the terms used above, please refer to SCSI Trade  
Configuring for the DEC/Compaq UNIX Environment 6  
Finding Existing  
SCSI Controllers  
and Devices  
SCSI ID #7 is almost always dedicated to the SCSI controller. Never  
configure your target device for ID 7 unless you are absolutely sure that  
the controller is not addressed for ID 7.  
6
50  
LTO-2 Half-Height Tape Drive User’s Guide  
           
Chapter 6 UNIX Settings  
Configuring for the DEC/Compaq UNIX Environment  
ConfiguringDigital  
UNIX Version 4.0  
and later/Compaq  
Use File Manager to open the file /etc/ddr.dbase and create an entry as  
follows:  
SCSIDEVICE  
Tru64 UNIX 5.x  
6
#
Type=tape  
Name="CERTANCE""ULTRIUM 2"  
#
PARAMETERS:  
TypeSubClass=tk  
TagQueueDepth=0  
MaxTransferSize=0x0ffffff#(16MB-1)  
ReadyTimeSeconds=180#seconds  
CMD_PreventAllow=supported  
CMD_ExtReserveRelease=supported  
BlockSize=0  
PwrMgmt_capable=0  
DENSITY:  
#
DensityNumber=0,2,3,4,5,6,7  
DensityCode=default  
CompressionCode=0x0  
Buffered=0x1  
DENSITY:  
#
DensityNumber=1  
DensityCode=default  
CompressionCode=0x1  
Buffered=0x1  
Save the file. Then run the following command:  
ddr_config-c  
ddr_config takes the default input file, ddr.dbase, and builds a new device  
database. This command takes effect immediately, without having to  
rebuild the kernel.  
Note: ddr.dbase is a UNIX shell script and is not written in C. This  
means # is used to signify a comment, not /* and */ or //, as  
used in C. Make sure any comments included in this file are  
preceded with the # character.  
LTO-2 Half-Height Tape Drive User’s Guide  
51  
 
Chapter 6 UNIX Settings  
Configuring for the Sun Environment (Solaris 2.4, 2.5, 2.6, 7, 8, and 9)  
To enable the tape driver to turn on data compression when writing data  
to tape use the .c. option.  
For commands that use density and tape size settings, the tape density is  
124,000 bpi and the tape length is 1800 feet. For commands that use a  
blocking factor, we recommend a blocking factor of 64 as a minimum (128  
is recommended).  
Configuring for the Sun Environment  
(Solaris 2.4, 2.5, 2.6, 7, 8, and 9)  
6
Use the following for attaching the LTO-2 Half-Height Tape Drive to Sun  
Sparc and Intel systems.  
Finding Current  
SCSI Controllers  
and Targets  
To properly attach SCSI devices to hosts it is necessary to ensure that each  
target device has a unique SCSI address. The commands .modinfo.  
and .dmesg. can be used to find the SCSI controllers in use and the SCSI  
target devices installed.  
6
For example, the command .dmesg | egrep .target. | sort | uniq. can find all  
SCSI controllers and SCSI targets. The output may look similar to:  
sd32 at ithps0: target2 lun0  
sd34 at ithps0: target4 lun0  
st21 at ithps1: target0 lun0  
st22 at ithps1: target1 lun0  
In this case, the LTO-2 Half-Height Tape Drive can be set for SCSI ID  
address 2 through 6 and attached to controller ithps1 (this particular  
controller also supports SCSI addresses 8 through 15).  
Types of  
Controllers  
You may be able to view the main pages of three types of SCSI controllers  
for Sun Sparc systems:  
6
esp  
glm  
isp  
52  
LTO-2 Half-Height Tape Drive User’s Guide  
       
Chapter 6 UNIX Settings  
Configuring for the Sun Environment (Solaris 2.4, 2.5, 2.6, 7, 8, and 9)  
We recommend that the LTO-2 Half-Height Tape Drive not be attached to  
esp controllers. This controller is not fast enough to work with the LTO-2  
Half-Height Tape Drive. The minimum recommended controller would  
be a glm controller, which is an Ultra Wide controller.  
We recommend Ultra3 SCSI-capable controllers capable of 160MB/s data  
transfer as a minimum. Slow backups will result if using slower SCSI  
controllers.  
Configuring the  
Device File  
st.conf  
To configure Solaris 2.4 and above to use the LTO-2 Half-Height Tape  
Drive correctly, add the following lines to the file st.conf in the directory /  
kernel/drv.  
6
tape-config-list=  
“CERTANCEULTRIUM 2”, “Seagate LTO 2”, ”Certance_LTO2”;  
Note: The last entry in this section must end with a semicolon  
• Certance LTO2 = 1,0x3b,0,0x1d639,4,0x,00,0x00,0x00,0x00,0,1;  
The value 0x1d639 equates to the way that the LTO-2 Half-Height Tape  
Drive is configured to operate in the Solaris environment. This value  
enables the LTO-2 Half-Height Tape Drive to:  
Support variable length records (variable length block size)  
Backspace over files (same as .mt bsf.command to backspace over  
file marks)  
Backspace over records (same as .mt bsr., backspace over  
individual tape blocks)  
Long time-out for long erase function (it is not recommended to try  
and erase the entire tape)  
LTO-2 Half-Height Tape Drive knows when end of data has been  
encountered  
Device driver is unloadable  
Long timeouts (5 times longer than normal)  
Buffered writes supported  
Variable record size not limited to 64k  
LTO-2 Half-Height Tape Drive User’s Guide  
53  
 
Chapter 6 UNIX Settings  
Configuring for the IBM AIX Environment (AIX Version 4.1.x and later)  
Uses Mode Select Page 10h to enable/disable compression  
Once st.conf has been modified, the kernel must be reconfigured by  
booting the system using the boot-r command. If you are replacing a tape  
device with the same SCSI ID you may want to delete the st devices from  
the /dev/rmt directory (recommended).  
When using commands that require a blocking factor such as tar or  
ufsdump, we suggest a minimum factor of 64. The preferred factor is 128.  
For commands that use density and tape size settings the tape density is  
124,000 bpi and the tape length is 1800 feet. We suggest using the  
ufsdump/ufsrestorecommands. These commands automatically  
detect end of tape without the need of the density and tape length  
settings.  
To enable the st driver to turn on data compression when writing data to  
tape use the .c. option. For example, tar cf /dev/rmt/0c causes the tape drive  
to compress the data before writing the data to tape.  
Configuring for the IBM AIX Environment  
(AIX Version 4.1.x and later)  
6
Finding Existing  
SCSI Controllers  
and Devices  
Enter the following command: lsdev–Cs scsi. This shows all the SCSI  
target IDs known to the system. Note the SCSI target IDs and choose a  
SCSI ID for the LTO-2 Half-Height Tape Drive that will not conflict with  
6
the IDs shown from the lsdevcommand.  
SCSI ID #7 is almost always dedicated to the SCSI controller. Never  
configure your target device for ID 7 unless you are absolutely sure that  
the controller is not addressed for ID 7.  
Configuring the  
LTO-2 Half-Height  
Tape Drive using  
SMIT  
The LTO-2 Half-Height Tape Drive can be configured to work with AIX  
Versions 4.1.x and later by using the SMIT.Other SCSI Tape Drive. option.  
6
Note: Record the SCSI ID of the tape drive before installing it.  
To configure AIX using the SMIT utility, use the following procedure:  
54  
LTO-2 Half-Height Tape Drive User’s Guide  
       
Chapter 6 UNIX Settings  
Configuring for the IBM AIX Environment (AIX Version 4.1.x and later)  
1 Enter SMIT at the Tape Drive menu by typing smit tape  
2 Select Add a tape Drive.  
3 Select the type of tape drive you will be adding. Use the Other SCSI  
Tape Drive option.  
4 Select the Parent SCSI Adapter from the available list.  
The Add a tape Drive “Entry Fields” appears.  
5 Some of the standard options can be changed to maximize drive  
performance and functionality:  
Set the Connection Address with the Drives Target and Lun (always use  
Lun 0). In the list, the Target is the first number and the Lun is the  
second. For example, if the drive is ID 5, choose 5,0.  
Set the BLOCK size to 0.  
Set Use DEVICE BUFFERS during writes to yes.  
Set RETURN error on tape change or reset to no.  
Set Use EXTENDED file marks to yes.  
Set RESERVE/RELEASE support to yes.  
Set BLOCK SIZE for variable length support (Num.) to 0.  
Set Density 1 to 0.  
6 Leave the Set delay. . . and Set timeout. . . lines at the default value.  
7 Click OK and the drive will be installed in the system database, and  
devices created. There is no need to reboot the system.  
LTO-2 Half-Height Tape Drive User’s Guide  
55  
Chapter 6 UNIX Settings  
Configuring for SCO Open Server 5.0.x  
8 Exit SMIT.  
Note: We suggest using the AIX commands .backup and .restore  
when transferring data to and from the LTO-2 Half-  
Height Tape Drive. These commands transfer data more  
quickly than other commands such as tar and cpio.  
• For cpio we suggest a blocking factor of 128.  
• For tar we suggest using the .N option and a factor of  
128.  
• Some older systems with poor video controllers may  
experience a reduction in performance when using  
the .v option, which prints the path names on the  
standard console during the backup. Unless there is a  
real need to see the filenames as they are backed up we  
suggest not using the .v option.  
• For commands that use density and tape size settings  
the tape density is 124,000 bpi and the tape length is  
1800 feet.  
Configuring for SCO Open Server 5.0.x  
6
Finding Existing  
SCSI Controllers  
and Devices  
The files /usr/adm/hwconfig and/var/adm/messages list the devices found  
during boot up of Open Server. The current SCSI controllers can be found  
using the command:  
6
grep adapter /usr/adm/hwconfig  
6
This command produces output similar to:  
%adapter 0x6400–0x64FF 11 type=alad ha=0  
bus=0 id=7 fts=st0.  
The current tape drives can be found using the command:  
grep tape /usr/adm/hwconfig  
56  
LTO-2 Half-Height Tape Drive User’s Guide  
     
Chapter 6 UNIX Settings  
Configuring for SCO Open Server 5.0.x  
This command produces output similar to:  
%tape type=S ha=0 id=6 lun=0 bus=0 ht=alad  
The information above shows that an Adaptec SCSI controller is installed  
(alad) and a SCSI tape drive (type=S) is installed as target id 6. SCSI ID #7  
is almost always dedicated to the SCSI controller. Never configure your  
target device for ID 7 unless you are absolutely sure the controller is not  
addressed for ID 7.  
Configuring the  
LTO-2 Half-Height  
Tape Drive with  
mkdev  
Once connected to the system, installation of the drive is performed  
using the following command:  
mkdevtape  
6
A numeric-based menu appears. If you are replacing an existing SCSI  
tape drive, use option 3 to remove the existing tape drive from the  
configuration files. Then follow the instructions below to add an LTO-2  
Half-Height Tape Drive.  
1 From the menu, choose Configure a SCSI or Enhanced IDE tape drive.  
2 From the next menu, choose Install a SCSI tape drive.  
3 When prompted, enter the SCSI adapter string. To view the list of  
supported SCSI adapters, use the hoption.  
4 Enter the number of the SCSI host adapter attached to the drive. If  
one SCSI adapter exists, enter the number zero (0).  
5 Enter the number of the SCSI bus attached to the drive. Refer to the  
SCSI adapter documentation. For many adapters this will be zero (0).  
6 Enter the SCSI ID of the tape drive.  
7 Enter the number zero (0) for the LUN of the device.  
8 When prompted to Update the SCSI configuration? (y/n), enter y.  
9 When prompted for Vendor Identification string, enter CERTANCE.  
10 When prompted to enter the SCSI version to which the tape drive  
conforms, enter the number three (3).  
11 When prompted to enter the Response Data Format the tape drive  
uses, enter the number two (2).  
12 When prompted, choose the Generic SCSI-1/SCSI-2 tape drive option.  
LTO-2 Half-Height Tape Drive User’s Guide  
57  
 
Chapter 6 UNIX Settings  
Configuring for Linux  
13 When the process takes you back to the two Main Menu screens,  
press q.  
14 When asked to create a new kernel, enter yes.  
15 When asked if you want the new kernel to boot by default press y.  
16 When asked if you want the kernel environment to be rebuilt press y.  
17 Reboot the system.  
Note: Not all of the SCO “tape” commands will operate or be  
applicable to the LTO-2 Half-Height Tape Drive (execute the  
command .man tape. for the specifics on how the tape  
command works). The following tape commands are not  
available for use with the LTO-2 Half-Height Tape Drive:  
getcomp, setcomp (the LTO-2 drives will always compress the  
data before writing the data to tape under SCO Open Server  
5.0.x), partition, setpart, getpart, getspeed, setspeed, rsm,  
wsm. The following tape commands are available for use with  
the LTO-2 Half-Height Tape Drive: status, load, reset, rewind,  
retention, getblk, setblk, unload, eod.  
Note: When using the GUI Backup Manager utility set the block size  
to 32768 minimum, 65536 preferred. When using commands  
such as tar we suggest using the tape command to set the  
block size to 512 and then using a blocking factor of 80 for the  
tar command. For commands that use density and tape size  
settings the tape density is 124,000 bpi and the tape length is  
1800 feet.  
Configuring for Linux  
6
Finding Existing  
SCSI Controllers  
and Devices  
Before installing the LTO-2 Half-Height Tape Drive, ensure that the  
requisite SCSI controllers and device drivers are installed on your system.  
To find existing SCSI controllers execute the command:  
dmesg | grep SCSI  
6
58  
LTO-2 Half-Height Tape Drive User’s Guide  
     
Chapter 6 UNIX Settings  
Configuring for Linux  
You may see output similar to:  
(scsi0)<Adaptec AHA-294XX Ultra2 SCSI host  
adapter> found at PCI 0/16/0  
To find existing SCSI devices execute the command:  
cat /proc/scsi/scsi  
You may see output similar to:  
Host: scsi0 Channel: 0 Id:6 Lun:00  
Vendor: CERTANCE Model: ULTRIUM2  
Type: SequentialAccess ANSI SCSI  
Revision 03  
Use the output of these two commands to see which SCSI target id  
numbers are free. In the above example a tape drive is attached at target  
id 6. SCSI ID #7 is almost always dedicated to the SCSI controller. Never  
configure your target device for ID 7 unless you are absolutely sure that  
the controller is not addressed for ID 7.  
The widely available distributions of Linux automatically install the  
proper SCSI and tape device drivers. If you executed the catcommand  
above, you have ensured that the SCSI driver for your controller is  
installed. To view currently loaded modules, execute the lsmod  
command. Ensure that one of the entries is st.  
To view the st device number for your attached tape drive, execute the  
command:  
dmesg | grep tape  
You should see output similar to:  
Detected SCSI tape st0 and scsi0 . . .  
Using the LTO-2  
Half-Height Tape  
Drive  
The LTO-2 Half-Height Tape Drive can be configured via the mt  
command options and a default configuration can be setup using the  
stsetoptionscommand from within the mt command. See the man page  
for mt for details. We suggest not using the erase command nor  
commands which attempt to partition the tape. Partitioning is not  
supported in the LTO format.  
6
For commands that use density and tape size settings, the tape density is  
124,000 bpi and the tape length is 1800 feet. For commands that use a  
blocking factor, we suggest a factor of 128.  
LTO-2 Half-Height Tape Drive User’s Guide  
59  
 
Chapter 6 UNIX Settings  
Configuring for SGI Irix  
Configuring for SGI Irix  
6
Finding Current  
SCSI Controllers  
and Targets  
To properly attach SCSI devices to hosts it is necessary to ensure that each  
target device has a unique SCSI address. The command hinvcan be used  
to find all attached SCSI controllers and target devices. To search for all  
SCSI controllers and devices use the command:  
6
hinv –v | grep SCSI  
The output of the command will be similar to the following:  
Integral SCSI controller 0: Version ADAPTEC 7880  
Disk drive unit 1 on SCSI controller 0  
CD ROM unit 4 on SCSI controller 0  
Integral SCSI controller 1: Version ADAPTEC 7880  
Tape drive: unit 6 on SCSI controller 1: DAT  
This output shows that a tape drive is present on SCSI controller 1 at SCSI  
ID address #6. Available SCSI IDs are  
0,2,3,5 6, 8 - 15 on controller 0  
1 - 5 and 8 - 15 on controller 1 (this controller supports Wide/Ultra  
SCSI)  
Note: SCSI ID #7 is almost always dedicated to the SCSI controller.  
Never configure your target device for ID 7 unless you are  
absolutely sure that the controller is not addressed for ID 7.  
See figure 2 on page 9 to view how to set the SCSI ID address  
jumpers for the LTO-2 Half-Height Tape Drive.  
Modifying the IRIX  
To attach the LTO-2 Half-Height Tape Drive to IRIX the file .scsi. needs to  
Configuration File 6 be modified by a text editor. The file can be found in /var/sysgen/master.d.  
Open the file and use the text editor to add the following at the end of the  
tape device entries:  
For IRIX 6.4/6.5  
{DATTAPE, TPDAT, 8, 7, “CERTANCE”, “ULTRIUM 2”, 0, 0, {0},  
MTCAN_BSF | MTCAN_BSR | MTCAN_APPEND | MTCAN_SETMK |  
MTCAN_PREV | MTCAN_SYNC | MTCAN_SPEOD | MTCAN_CHKRDY |  
MTCAN_VAR | MTCAN_SETSZ | MTCAN_SILI | MTCAN_SEEK |  
60  
LTO-2 Half-Height Tape Drive User’s Guide  
       
Chapter 6 UNIX Settings  
Configuring for HP-UX 11.0  
M TCAN_COMPRESS,  
40, 5*60, 10*60, 10*60, 3*3600, 512, 256*512,  
tpsc_default_dens_count, tpsc_defalt_hwg_dens_names,  
tpsc_default_alias_dens_names, {0}, 0, 0, 0, 0, (u_char*) 0},  
After modifying the configuration file, recompile the kernel with the  
autoconfigcommand and reboot the system. If you are replacing an  
existing storage device with the same SCSI ID remove the device files  
prior to using the autoconfigcommand and rebooting the system.  
Configuring for HP-UX 11.0  
6
Finding Current  
Hardware/Driver  
Configuration  
To find currently installed SCSI controllers and devices, use the  
command can ioscan–f. This command lists all the system devices and  
their device names.  
6
Attaching the LTO-  
2 Half-Height Tape  
Choose a SCSI address that does not conflict with any already attached  
SCSI devices on your SCSI controller. Figure 2 on page 9 for jumper  
installation for the LTO-2 Half-Height Tape Drive. Attach the LTO-2  
Half-Height Tape Drive and apply power to the drive(s) and the host  
system. After the boot process completes and you log in as superuser,  
issue the command:  
Drive  
6
ioscan –C tape –f.  
You should see output similar to:  
Class I H/WPath Driver S/WState H/Wtype Description  
Tape 7 8/12.6.0 stape Claimed Device CERTANCE ULTRIUM 2  
From the root directory and as superuser, issue the command:  
/sbin/insf –C tape.  
Then issue the command:  
/sbin/mksf –d stape –H x/x.x.x –I y –c 1  
–n –u /dev/rmt/zcnb  
LTO-2 Half-Height Tape Drive User’s Guide  
61  
       
Chapter 6 UNIX Settings  
Configuring for HP-UX 11.0  
Where:  
x is the data under H/WPathfrom the ioscan.  
y is the data under Ifrom the ioscan.  
z is the tape device identifier number.  
You can execute an ls command for the /dev/rmt directory to choose an  
identifier number that has not already been used. You can also choose a  
unique device name such as cnbto more easily remember which device  
name will enable data compression during write. Refer to the man pages  
for mksf to review settings for rewind/no rewind, Berkeley mode, and  
AT&T mode.  
After performing the insfand mksfcommands, use the command  
ioscan –fn | grep –C tape to check the installation. You should see output  
showing the hardware and device addressing and also the device name  
attached to the LTO-2 Half-Height Tape Drive.  
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LTO-2 Half-Height Tape Drive User’s Guide  
Chapter 7  
7Troubleshooting Guide  
This chapter contains best practices for getting the most out of your  
LTO-2 Half-Height Tape Drive. This chapter also contains  
troubleshooting information you can use to identify and resolve tape  
drive problems in the unlikely even you encounter a problem with your  
tape drive.  
Topics covered in this chapter are:  
Installation Best Practices  
7
Follow SCSI Best  
Practices  
When installing an LTO-2 Half-Height Tape Drive, follow SCSI best  
practices to ensure trouble-free installation and operation.  
7
SCSI Host Bus  
We strongly recommend that you attach the LTO-2 Half-Height Tape  
Adapters (HBA) 7  
Drive to SCSI controllers that support the SCSI Ultra3 LVD interface and  
160 MBytes SCSI transfer rate only.  
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63  
           
Chapter 7 Troubleshooting Guide  
Installation Best Practices  
In addition, do not  
Attach the tape drives to a non-LVD SCSI controller, as this will  
degrade the performance of the tape drive and the performance of  
your backups.  
Attach non-LVD SCSI devices on the same bus cable, as this will  
degrade the performance of the tape drive and your backups.  
Connect the tape drive to a disk RAID controller, as this is not  
supported.  
If you are installing an adapter, we recommend you use a SCSI LVD  
controller kit that includes the SCSI cable and terminator.  
If installing a SCSI HBA, be sure it is supported by your operating system  
and your backup software application. In addition, ensure that you have  
the proper drivers for the HBA, if any are necessary.  
Before you install the HBA, check and record your current system  
configuration. For example, in Windows 2000, you may find information  
on any currently installed SCSI HBA by:  
Double-clicking on Administrative Tools in the Control Panel.  
Clicking on Computer Management > Device Manager.  
Clicking on the SCSI host adapters listed.  
Clicking on Properties to view the Resources tab.  
In UNIX/Linux systems, you may find information on any currently  
installed SCSI HBA by viewing the boot log text file. Refer to your  
operating system documentation for specific information on reviewing  
your system configuration.  
After installing the SCSI HBA, reboot the system. Then ensure that the  
operating system recognizes the HBA and that there are no conflicts with  
other adapters.  
Adding the Tape  
Drive  
We recommend that the LTO-2 Half-Height Tape Drive be attached to a  
dedicated SCSI HBA. In addition to enabling the best performance for  
your tape drive, a dedicated SCSI HBA reduces the chances of installation  
difficulties arising from duplicate SCSI IDs on the same bus channel.  
7
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LTO-2 Half-Height Tape Drive User’s Guide  
 
Chapter 7 Troubleshooting Guide  
Troubleshooting Suggestions  
Ensure that the SCSI cable is of high quality and conforms to Ultra 2 SCSI  
specifications. A lesser quality cable or a cable that does not conform to  
the Ultra 2 SCSI specification may cause intermittent write/read errors,  
SCSI timeouts, and corrupted data.  
Troubleshooting Suggestions  
7
Computer will not  
If the computer has booted up and operated properly prior to adding a  
SCSI HBA and tape drive, but does not boot now:  
Boot  
7
1 Remove the SCSI HBA controller if it is installed.  
2 Reboot the system.  
If the system boots normally, then there is a problem with the  
SCSI HBA.  
Otherwise, ensure that SCSI HBA is compatible with system,  
does not have burnt components. Reseat the SCSI HBA in a  
different PCI slot and reboot the computer. If the system still  
does not boot, contact Technical Support.  
Computer Boots  
but Does not  
Recognize the  
Tape Drive  
If the computer boots but does not recognize the tape drive reboot the  
system and check whether the SCSI controller is seen at boot up. You  
should see messages similar to:  
7
SCSI Adapter Manufacturer SCSI BOIS xxxxxxx  
CHA: SCSI ID #,  
SCSI Device Name  
SCSI ID #, SCSI Device Name”  
If the SCSI Controller is not recognized during system boot, contact  
Technical Support.  
If the SCSI controller is recognized during system boot, determine  
whether the tape drive is recognized when the SCSI controller scans  
for devices. You should see messages similar to:  
Bus Target  
Lun Device  
0
0
0
CERTANCE ULTRIUM 2  
If the tape drive is not recognized during the SCSI controller scan,  
check the Power LED to make sure the tape drive is receiving power.  
LTO-2 Half-Height Tape Drive User’s Guide  
65  
         
Chapter 7 Troubleshooting Guide  
Troubleshooting Suggestions  
If the Power LED is not illuminated, check the power connections to  
the tape drive  
Internal tape drive:  
1 Power down the system and reseat the power connector on tape  
drive.  
2 Power on the system and check the Power LED.  
3 If the Power LED is not illuminated, replace the power connector  
attached to the tape drive with one from a known working device  
such as a CD-ROM. If the Power LED is illuminated, the problem  
was with the power connector. Otherwise, the tape drive may be  
bad and Technical Support should be contacted.  
Desktop tape drive:  
1 Turn power off to the tape drive and reseat the AC power cord.  
2 Power on the tape drive and check the Power LED.  
3 If the Power LED is not illuminated, use an AC power cord from  
a known working device. If the Power LED is illuminated, the  
problem was with the cable. Otherwise, the tape drive may be  
bad and Technical Support should be contacted.  
If the Power LED is illuminated, but the tape drive is not recognized  
during the SCSI controller scan, use the LEDs to verify that the drive  
tape drive “LEDs indicate a POST failure, the tape drive may be bad.  
Contact Technical Support.”  
If the tape drive LEDs indicate that the drive has passed the POST,  
check the following connections:  
Internal tape drive:  
1 Power down the system.  
2 Be sure there are no SCSI ID conflicts between the tape drive and  
other SCSI devices.  
3 Be sure you are using a proper SCSI cable and proper  
termination.  
4 Check the SCSI cable for bent pins.  
5 Try to use SCSI cable from other SCSI controller bus chain if  
possible.  
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Chapter 7 Troubleshooting Guide  
Troubleshooting Suggestions  
6 If these suggestions do not help, the tape drive may be bad and  
Technical Support should be contacted.  
Desktop tape drive:  
1 Power down system.  
2 Power cycle desktop tape drive.  
3 Be sure there are no SCSI ID conflict between the tape drive and  
other SCSI devices.  
4 Be sure you are using a proper SCSI cable and proper  
termination.  
5 Check the SCSI cable for bent pins.  
6 Try to use SCSI cable from other SCSI controller bus chain if  
possible.  
7 If these suggestions do not help, the tape drive may be bad and  
Technical Support should be contacted.  
Windows Operating System  
Tape Drive  
Recognizedduring  
System Boot but  
not by Operating  
System or  
When the tape drive is installed in a Windows operating system,  
Windows displays a message on the screen if it does not have a driver in  
place for the tape drive.  
If the tape drive will be used by an ISV application, you can click on the  
Cancel button to remove the message. When the ISV backup software  
application is running, the application invokes its drivers to run the tape  
drive. However, if you use a native Windows operating system backup  
utility, you must install the proper tape driver for the tape drive.  
Application  
7
Red Hat Linux  
7
The tape driver for Red Hat Linux is called “st”. This driver is  
automatically installed when Red Hat Linux is installed on your system.  
When Red Hat Linux boots, the operating system recognizes the tape  
drive and installs the tape drive as a device in the /dev directory. If this is  
the first tape device in the /dev directory, the tape drive is known as /dev/  
st0 or /dev/nst0.  
There are various ways to view the log files to see whether Linux  
recognizes the tape drive. One method is to open a terminal window and  
issue the following command from the root directory: dmesg | grep SCSI  
LTO-2 Half-Height Tape Drive User’s Guide  
67  
   
Chapter 7 Troubleshooting Guide  
Troubleshooting Suggestions  
You may see output similar to:  
(scsi0)<Adaptec AHA-294XX Ultra2 SCSI host adapter> found at PCI 0/16/0  
You may also be able to use the command: cat /proc/scsi/scsi  
You may see output similar to:  
Host: scsi0 Channel: 0 Id:6 Lun:00  
Vendor: CERTANCE Model: ULTRIUM2  
Type: Sequential AccessANSI SCSI Revision 03  
You can also use a text editor to view the messages in the file /var/log/ and  
look for tape drive entries.  
Sometimes a system may have multiple tape device names in the /dev  
directory and will not know which st number to use. To view the st  
device number for your attached tape drive, use the command: dmesg |  
grep tape  
You should see output similar to:  
Detected SCSI tape st0 and scsi0 . . .  
Problems with  
Tape Drive and  
Cartridge  
Tape will not Load into Tape Drive  
1 Verify that the tape drive’s Power Led is illuminated and that all  
other LEDs are off. If the Power LED is not illuminated, refer to the  
procedures for troubleshooting LEDs under Computer Boots but  
not illuminated.  
7
2 If the Power LED is illuminated but other LEDs are on or flashing.  
check to see if other LED activity is normal or abnormal, see Table 3  
3 If the Power On Self Test Failure LEDs are on, contact Technical  
Support.  
4 If other LEDs are on, reboot the drive by holding the front panel  
button for more than 5 seconds and releasing it or by power cycling  
the drive.  
5 Verify that the tape drive passed the Power On Self Test by viewing  
LED activity. All LEDs should be off approximately 20 to 30 seconds  
after the tape drive reboots.  
6 If the Power On Self Test Failure LEDs are on, contact Technical  
Support.  
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LTO-2 Half-Height Tape Drive User’s Guide  
   
Chapter 7 Troubleshooting Guide  
Troubleshooting Suggestions  
7 If all the LEDs are off, except power, and a tape cannot be inserted  
into the tape drive, examine the tape and the inside of the tape drive.  
Be sure there are no tape labels interfering with tape insertion.  
Be sure tape labels are only on proper tape surfaces, and that  
labels are flat and not curled.  
Ensure that tape drive opening is free of debris and tape labels.  
Ensure that tape pin and tape are fully within the cartridge.  
Attempt to insert a second tape if available.  
8 If a tape still cannot be inserted into the tape drive:  
If you are inserting a cleaning cartridge, be sure the cleaning tape  
is valid. The tape drive ejects unsupported cleaning tapes. Ensure  
that the cleaning tape has not expired. See table 3 on page 21 for  
Cleaning Cartridge at EOT. If these suggestions do not resolve  
the problem, contact Technical Support.  
If you are inserting a data tape, the tape drive may be bad.  
Contact Technical Support.  
Tape will not Eject from the Drive  
7
1 Be sure the tape drive is powered on. If the Power LED is not  
illuminated, check whether power is being applied to the system  
and/or the desktop tape drive if the tape drive is a desktop unit.  
Follow troubleshooting steps under Computer Boots but Does not  
Recognize the Tape Drive on page 65 to determine why the Power  
LED is not illuminated.  
2 If the Power LED is illuminated, determine whether the tape drive  
LEDs show other tape drive activity. Under normal conditions, it  
may take 2 to 3 minutes for the tape to eject. If only the Drive LED is  
blinking, wait for this LED to turn off before trying to eject the tape.  
3 If the Drive LED alone is blinking, wait for it to turn off. Verify that no  
other LEDs are on or flashing. Push the eject button on tape drive.  
4 If the Drive LED flashes, wait for the tape to eject (this may take up to  
3 minutes). If the tape ejects, the problem has been resolved.  
5 If a message similar to the following appears when the eject button is  
pushed, use the mt offline command to eject the tape:  
LTO-2 Half-Height Tape Drive User’s Guide  
69  
 
Chapter 7 Troubleshooting Guide  
Troubleshooting Suggestions  
You cannot eject the cartridge because the tape drive is in use. Wait until the  
operation is complete before ejecting the cartridge.” The backup software  
may still have the tape drive in prevent mode so that the cartridge cannot be  
ejected. Use the backup software commands to eject the tape.  
Note: In UNIX/Linux the above message may not appear, but  
the operating system may still prevent the tape drive from  
ejecting the tape--use mt offline.  
6 If the Drive LED is not blinking alone, see table 3 on page 21 to verify  
whether a hardware or firmware error has occurred, or whether the  
“Manual Intervention” LED is flashing.  
If there is a hardware or firmware error or the “Manual  
Intervention” LED is flashing — and the Drive LED is blinking —  
contact Technical Support.  
If there is a hardware or firmware error or the “Manual  
Intervention” LED is flashing — and the Drive LED is not blinking  
— reboot drive by holding the front panel button for more than 5  
seconds and releasing it or power cycling the drive.It may take  
up to 5 minutes for the tape to eject.  
7 If the “Hardware or Firmware Error” or “Manual Intervention” LED is  
flashing after the tape drive is rebooted, the tape may be stuck.  
Contact Technical Support.  
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LTO-2 Half-Height Tape Drive User’s Guide  
Chapter 7 Troubleshooting Guide  
Emergency Reset and Emergency Cartridge Eject  
Emergency Reset and Emergency Cartridge Eject  
7
In the unlikely event the LTO-2 Half-Height Tape Drive stops  
communicating with the host computer, use the following procedure to  
reset the drive and eject a cartridge (if necessary).  
Caution: When you perform an emergency cartridge eject, any data  
currently in the drive or host's buffers will not be written  
to the tape and the tape record may not be correctly  
terminated with an End-of-Data mark. If the End-of-Data  
mark is not written to the tape, you will not be able to  
append any data to that tape unless you overwrite the  
existing data on the tape.  
To perform an emergency reset, hold down the load/unload button  
between 5 to 15 seconds, and then release it.  
If there is no tape in the drive, the drive firmware reboots the drive  
and begins the power-on self-test sequence.  
If there is a tape in the drive, the drive ignores all outstanding SCSI  
commands, ejects the tape, reboots, and begins the Power On Self  
Test sequence.  
If the procedures above do not eject the cartridge from the drive, you may  
need to remove the cartridge manually, see Problems During Backup/  
Problems During Backup/Restore Operations  
7
Backup Failures 7  
A Backup failure can be caused by various reasons. The LTO-2 Half-  
Height Tape Drive supports the TapeAlert standard. The following  
troubleshooting steps start when software logs a TapeAlert message. You  
can view the TapeAlert message either on the main console screen or in  
the backup software’s log file. There may be more than one TapeAlert  
message per backup failure event.  
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Chapter 7 Troubleshooting Guide  
Problems During Backup/Restore Operations  
1 The TapeAlert message or backup log shows, “The operation has  
stopped because an error has occurred while reading or writing data which  
the drive cannot correct.” A media error occurred during write or read  
operation on the tape drive. Review the troubleshooting procedures  
to ensure that the proper SCSI cabling and termination practices are  
being followed. Restart the backup if any changes are made to the  
SCSI cabling or termination or if any cables or terminator are  
unplugged then re-plugged.  
This message may also be seen with, “The tape is from a faulty batch or  
the tape drive is faulty.” or “The tape is damaged or the drive is faulty. Call the  
tape drive supplier helpline.” If either of these messages also appears, use  
a good tape to test the drive. If the problem persists, call the tape  
drive supplier helpline.  
2 Remove the data tape and insert a cleaning cartridge. After the  
cleaning cartridge ejects reinsert the data tape and restart the backup.  
If the backup succeeds, the problem is resolved.  
3 If the backup fails, try to isolate the tape media vs. tape drive. Use  
diagnostic software to perform a write/read test of 4GB of data. The  
current data on the tape WILL BE OVERWRITTEN AND ALL  
PREVIOUSLY WRITTEN DATA ON THE TAPE WILL BE DESTROYED.  
Use a second tape for the diagnostic test. If the diagnostic test passes  
on the second tape, use the tape for the backup process and remove  
the first tape from the backup process.  
4 If the diagnostic test fails on the second tape, insert a cleaning tape  
into the drive and repeat the diagnostic write/read test. If the  
diagnostic test passes on the second tape, the problem is resolved.  
5 If the diagnostic test fails on the second tape, the tape drive may be  
bad. Use the diagnostic software to perform a write/read test on the  
first data tape. The current data on the tape WILL BE OVERWRITTEN.  
ALL PREVIOUSLY WRITTEN DATA ON THE TAPE WILL BE  
DESTROYED. If the diagnostic test passes on the first tape, the  
problem is resolved. If the diagnostic fails on the first tape, the tape is  
bad and should not be used any longer.  
6 If a second data tape is not available to test with the diagnostic  
software, but a cleaning tape is available, insert the cleaning tape.  
Remove the cleaning tape after the cleaning tape ejects and restart the  
backup. If backup is successful, the tape drive and tape are  
satisfactory.  
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Chapter 7 Troubleshooting Guide  
Problems During Backup/Restore Operations  
7 If the backup fails, use the diagnostic software to perform a write/  
read test of 4GB of data. The current data on the tape WILL BE  
OVERWRITTEN. ALL PREVIOUSLY WRITTEN DATA ON THE TAPE WILL  
BE DESTROYED. If the tape drive passes the diagnostic write/read  
test, perform backup again. If the tape drive fails the diagnostic, the  
drive may be bad. Contact Technical Support.  
Tape is Write  
Protected  
The following troubleshooting steps start when software logged a  
TapeAlert message. The TapeAlert message can be viewed either on the  
main console screen or in the backup software’s log file. There may be  
more than one TapeAlert message per backup failure event.  
7
1 The TapeAlert message or backup log shows, You are trying to write to a  
write-protected cartridge. Remove the write-protection or use another tape.”  
Eject the tape from the drive and move the write protect tab to the  
enable position. Reinsert the tape and restart the backup.  
2 If the TapeAlert message or backup log shows, “The memory in the tape  
cartridge has failed, which reduces performance. Do not use the cartridge for  
further backup operations.” a Cartridge Memory chip failure may have  
occurred in the tape cartridge or a tape drive failure may have  
occurred. Use another tape to perform a backup. (This message may  
be seen with, You have loaded a cartridge of a type that is read-only in this  
drive. The cartridge will appear as write-protected.”)  
3 Insert a second tape and restart the backup. The backup should be  
successful. The first tape cannot be used for further backups. If you  
insert a second tape for a backup and other tape alert messages  
appear in the backup software again, the tape drive may be bad.  
4 If you start a backup and the software displays a message on the  
console a message similar to “Overwrite protection is set to ______. Click  
OK to overwrite the media or insert new media that can be overwritten.” it  
indicates a software-related problem. Refer to the backup software  
instructions on overwrite and append settings.  
Miscellaneous  
TapeAlert  
Messages  
1 If either of the following messages appears:  
“The tape drive has a hardware fault”:  
7
a
b
Eject the tape or magazine.  
Reset the drive.  
LTO-2 Half-Height Tape Drive User’s Guide  
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Chapter 7 Troubleshooting Guide  
Problems During Backup/Restore Operations  
c
Restart the operation.  
Or  
“The tape drive has a hardware fault”:  
a
b
c
Turn the tape drive off and then on again.  
Restart the operation.  
If the problem persists, call the tape drive supplier helpline.  
Check the tape drive users manual for device specific instructions on  
turning the device power on and off.  
See table 3 on page 21 to determine whether the LED activity  
indicates a “Hardware or Firmware Error” or “Manual Intervention  
Required.” If it does, power cycle the tape drive. The tape should  
eject. This may take several minutes.  
If the tape drive ejects the tape and all LEDs are off (with the possible  
exception of Cleaning Request LED), the problem is resolved.  
If the tape did not eject and the LEDs show “POST Failure,”  
Hardware or Firmware Error,” or “Manual Intervention Required,” the  
drive may be bad. Contact Technical Support.  
2 If you have a problem with inserting a cleaning cartridge and receive  
the message:  
“The last cleaning cartridge used in the tape drive has worn out:  
Discard the worn out cleaning cartridge.  
Wait for the current operation to finish.  
Then use a new cleaning cartridge.”  
It means the cleaning cartridge is used up. Purchase a new cartridge  
to perform any more cleaning cycles. Normal operation of the drive is  
not affected. The drive will continue to automatically eject the  
expired cleaning cartridge.  
3 If you insert a cleaning tape that is not expired but the tape is being  
ejected by the tape drive without performing the cleaning, you may  
see the message:  
“The last cleaning cartridge used in the tape drive was an invalid type:  
1. Do not use this cleaning cartridge in this drive.  
2. Wait for the current operation to finish.  
3. Then use a valid cleaning cartridge.”  
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Problems During Backup/Restore Operations  
This message means the tape drive does not recognize the cleaning  
tape as being of a valid type. You may have purchased a cleaning  
tape that is not supported by the tape drive. Purchase a supported  
cleaning tape.  
If the tape drive issues a message to backup software to instruct you  
to clean the tape drive, you may see the message:  
“The tape drive needs cleaning:  
1. If the operation has stopped, eject the tape and clean the drive.  
2. If the operation has not stopped, wait for it to finish and then clean the  
drive.  
Check the tape drive users manual for device specific cleaning instructions.”  
This message means you should use a supported cleaning tape.  
Slow Backups  
7
There are many factors that can make backups appear to be “slow.” To  
achieve the highest possible transfer rate, the LTO-2 half-height tape  
drive MUST be attached to a Low Voltage Differential ( LVD ) SCSI  
controller capable of a minimum of 80 MB/s and MUST not share the  
same SCSI bus as another active SCSI device such as hard drives.  
1 Is the tape drive attached to an LVD SCSI controller? This can be  
determined by viewing the boot process of the system and looking to  
see what controller the tape drive is attached to. There may be boot  
log files that can be examined to determine what SCSI controller the  
tape drive is attached to.  
2 If the tape drive is not attached to an LVD SCSI controller, attach the  
tape drive to a LVD SCSI controller to achieve best possible hardware  
performance for best possible transfer rate.  
3 If the tape drive is attached to an LVD SCSI controller, see whether  
the tape drive is the only device on the SCSI cable? This can be  
determined by viewing Windows Device Manager, viewing Unix/  
Linux logs, or by viewing SCSI controller during system boot up.  
4 If other SCSI devices are attached to the SCSI controller and are active  
during the time when a backup is performed to the tape drive, have  
the tape drive as the only device on the SCSI cable to achieve the best  
possible backup performance.  
LTO-2 Half-Height Tape Drive User’s Guide  
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Chapter 7 Troubleshooting Guide  
Problems During Backup/Restore Operations  
The method of performing the backups can also be a factor in “slow”  
backups. Data sent to the tape drive over a network connection and  
delays in data transfer over a network connection can cause backups to  
slow down.  
1 Perform write/read test with diagnostic software. This ensures a test  
of the connection between the tape drive and SCSI controller and  
removes the network data transfer and the backup software from the  
diagnosis. The write/read test WILL OVERWRITE DATA ON THE TAPE.  
2 When the test finishes, determine the megabyte per second data  
transfer. The resulting calculation shows the tape drive performing at  
an acceptable rate.  
3 If you believe that the write/read transfer is slow even after using the  
diagnostic software write/read test, use the Certance Tape  
Diagnostic software to perform a trace buffer retrieval. Send the file  
to Technical Support, so that the state of the SCSI bus can be  
determined.  
4 If the diagnostic write/read test transfer rate is acceptable, but  
backups still seem to be “slow,” it may be attributed to the number of  
files and the average file size that are to be backed up. These factors  
can have a significant effect on the backup performance. Backups  
where the average file size is less than 200k bytes are slower than  
backups where the average file size is greater than 200k bytes. Obtain  
backup log files to determine number of files and average file size.  
76  
LTO-2 Half-Height Tape Drive User’s Guide  
Index  
Cautions, internal drives 6  
A
Checking SCSI termination  
desktop drives 17  
AIX 4.1 settings 54  
internal drives 14, 17  
Cleaning a tape drive 24  
Computer boots but does not  
recognize tape drive 65  
B
Configuring  
Backup/restore problems 71  
Best practices 63  
internal drives 7  
Connecting  
blink codes 21  
power cable  
desktop drives 17  
internal drives 15  
C
SCSI cable for desktop drives 16  
SCSI cable for internal drives 13  
serial cable for internal drives 14  
Cartridges  
care and maintenance 23  
ejecting 71  
loading 22  
D
specifications 44  
troubleshooting 68  
unloading 22  
Data buffer 29  
Data compression  
write-protecting 22, 73  
LTO-2 Half-Height Tape Drive User’s Guide  
77  
 
Index  
considerations 32  
intelligent 33  
G
data compression 31  
Data integrity 29  
Guidelines, internal drives 6  
error-correction code 29  
servo-tracking faults 31  
DEC/Compaq Unix settings 50  
Desktop drives  
H
HP-UX 11.0 settings 61  
checking SCSI termination 17  
connecting a power cable 17  
connecting a SCSI cable 16  
installation instructions 16  
installing the LTO driver 17  
quick start 5  
I
IBM AIX 4.1.x and later settings 54  
Injected noise 42  
SCSI ID settings 16  
Inspection 6  
Drive maintenance  
Installation instructions  
see desktop drives 16  
see internal drives 7  
Installing the LTO driver  
desktop drives 17  
cleaning a tape drive 24  
Drive performance specifications  
Specifications  
drive performance 39  
internal drives 15  
Intelligent data compression 33  
Internal drives  
E
checking SCSI termination 14  
configuring 7  
Ejecting a cartridge 71  
Emergency cartridge eject 71  
Emergency reset 71  
connecting a power cable 15  
connecting a SCSI cable 13  
connecting a serial cable 14  
guidelines and cautions 6  
installation instructions 7  
installing the LTO drive 15  
mounting 11  
Environmental requirements 41  
Error-correction code 29  
External drives  
quick start 5  
quick start 4  
F
registering 15  
SCSI ID 8  
Features 2  
terminator power 10  
Front panel display 20  
78  
LTO-2 Half-Height Tape Drive User’s Guide  
Index  
L
R
Layout of track 27  
Linux settings 58  
Recording method 29  
Registering tape drive 15, 18  
Regulatory compliance 45  
Reliability 42  
Loading a cartridge 22  
Reset, emergency 71  
M
Mean time between failures 43  
Method of recording 29  
Mounting  
S
SCO Open Server 5.0.x Unix settings  
internal drive 11  
SCSI cable connection  
desktop drives 16  
internal drives 13  
SCSI controllers 50  
SCSI ID  
O
Overview 1  
desktop drives 16  
internal drives 8  
SCSI II specification xiii  
Serial cable connection  
internal drives 14  
Servo-tracking faults 31  
SGI Irix settings 60  
Slow backups 75  
P
Physical specifications 36  
Power cable connection  
desktop drives 17  
internal drives 15  
Specifications  
Power specifications 38  
environmental requirements 41  
injected noise 42  
LTO cartridge 44  
mean time between failures 43  
physical 36  
Q
Quick start  
power 38  
desktop drives 5  
external drives 5  
internal drives 4  
regulatory compliance 45  
reliability 42  
Sun (Solaris 2.4, 2.5, 2.6, 7, 8, 9) Unix  
settings 52  
LTO-2 Half-Height Tape Drive User’s Guide  
79  
Index  
T
W
Tape drive  
Write-protecting a cartridge 22, 73  
cleaning 24  
registering 15, 18  
Tape drive not recognized by  
operating system or application 67  
Tape drive troubleshooting 68  
Tape will not eject from drive 69  
TapeAlert messages 73  
Terminator power  
internal drives 10  
Track layout 27  
Troubleshooting 65  
backup/restore problems 71  
Computer boots but does not  
recognize tape drive 65  
slow backups 75  
tape drive not recognized by  
operating system or application  
tape drives and cartridges 68  
tape will not eject from drive 69  
tapeAlert messages 73  
U
Unix settings  
DEC/Compaq Unix 50  
SCO Open Server 5.0.x 56  
Sun (Solaris 2.4, 2.5, 2.6, 7, 8, 9) 52  
Unloading a cartridge 22  
Unpacking 6  
80  
LTO-2 Half-Height Tape Drive User’s Guide  

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