Fujitsu Computer Drive MAP3367NC User Manual

C141-E166-02EN  
MAP3147NC/NP  
MAP3735NC/NP  
MAP3367NC/NP  
DISK DRIVES  
PRODUCT/MAINTENANCE MANUAL  
REVISION RECORD  
Edition Date published Revised contents  
01  
02  
May, 2002  
July, 2002  
Table 2.1 is partly modified.  
Specifications of Table 2.2 and 2.3 are partly modified.  
Specifications in Figure 3.1 and subsection 3.1.1(1) are partly modified.  
Specification of mounting screw in subsection 4.1.1 is added.  
Procedures of spindle motor startup in section 4.2(4) is modified.  
Section 4.3 is revised.  
Section 5.3 is revised.  
Length of mounting screw in subsection 5.4.2 is modified.  
Troubleshooting in Table 6.2 is added.  
APPENDIX A and B are revised.  
Specification No.: C141-E166-**EN  
C141-E166  
i
Related Standards  
Product specifications and functions described in this manual comply with the following ANSI  
(*1) standards.  
Document number  
Title  
T10/1236D Rev.20  
SCSI Primary Commands-2 (SPC-2)  
[NCITS.351:2001]  
T10/996D Rev.8c  
[NCITS.306:1998]  
SCSI-3 Block Commands (SBC)  
T10/1157D Rev.20  
T10/1365D Rev.7  
SCSI Architecture Model-2 (SAM-2)  
SCSI Parallel Interface-4 (SPI-4)  
*1 ANSI = American National Standard Institute  
In case of conflict between this manual and any referenced document, this manual takes  
precedence.  
ii  
C141-E166  
PREFACE  
This manual describes the MAP3147NC/NP, MAP3735NC/NP and MAP3367NC/NP (hereafter, MAP  
series), 3.5 type fixed disk drives with an embedded SCSI controller.  
This manual details the specifications and functions of the above disk drive, and gives the requirements and  
procedures for installing it into a host computer system.  
This manual is written for users who have a basic understanding of fixed disk drives and their use in  
computer systems. The MANUAL ORGANIZATION section describes organization and scope of this  
manual. The need arises, use the other manuals.  
OVERVIEW OF MANUAL  
This manual consists of the following eight chapters:  
CHAPTER 1  
GENERAL DESCRIPTION  
This chapter introduces the MAP series disk drives and discusses their standard features, hardware, and  
system configuration.  
CHAPTER 2  
This chapter gives detailed specifications of the MAP series disk drives and their installation environment.  
CHAPTER 3 DATA FORMAT  
SPECIFICATIONS  
This chapter describes the data structure of the disk, the address method, and what to do about media  
defects.  
CHAPTER 4  
This chapter describes the basic physical and electrical requirements for installing MAP series disk drives.  
CHAPTER 5 INSTALLATION  
INSTALLATION REQUIREMENTS  
This chapter explains how to install MAP series disk drives. It includes the notice and procedures for  
setting device number and operation modes, mounting the disk drive, connecting the cables, and confirming  
drive operation.  
CHAPTER 6  
DIAGNOSIS AND MAINTENANCE  
This chapter describes the automatic diagnosis, and maintenance of MAP series disk drive. This chapter  
also describes diagnostic methods for operation check and the basics of troubleshooting the disk drives.  
CHAPTER 7  
ERROR ANALYSIS  
This chapter describes in details how collect the information for error analysis and how analyze collected  
error information.  
APPENDIX A TO B  
The appendixes give supplementary information, including a list of setting items and the signal assignments  
of interface connector.  
C141-E166  
iii  
CONVENTIONS FOR ALERT MESSAGES  
This manual uses the following conventions for alerts to prevent physical or property damages to users or  
by standards.  
This indicates that either minor or moderate  
personal injury may occur if the user does not  
perform the procedure correctly.  
CAUTION  
This indicates that inconvenience to the user  
such as damages to the product, equipment, data,  
and/or other property may occur if the user does  
not pay attention or perform the procedure  
correctly.  
NOTICE  
This indicates information that the helps the user  
use the product more effectively.  
IMPORTANT  
CONVENTIONS USED IN THIS MANUAL  
The MAP3147NC/NP, MAP3735NC/NP and MAP3367NC/NP disk drives are described as "the intelligent  
disk drive (IDD)", "the drive" or "the device" in this manual.  
Decimal number is represented normally.  
Hexadecimal number is represented as X'17B9', 17B9h or 17B9H.  
Binary number is represented as "010".  
ATTENTION  
Please forward any comments you may have regarding this manual.  
To make this manual easier for users to understand, opinions from readers are needed. Please write your  
opinions or requests on the Comment at the back of this manual and forward it to the address described in  
the sheet.  
iv  
C141-E166  
Important Alert Items  
Important Alert Messages  
The important alert messages in this manual are as follows:  
A hazardous situation could result in minor or moderate personal injury if the  
user does not perform the procedure correctly. This alert signal also indicates  
that damages to the product or other property may occur if the user does not  
perform the procedure correctly.  
Task  
Alert message  
Page  
2-5  
Mounting Installation  
Data loss  
For MAP series, Reed Solomon codes are applied for their ECC.  
The sector-data is divided into 6 interleaving sectors, and ECC is  
performed in each sector where the maximum number of errors  
(up to 5 byte) can be corrected. [Total maximum byte: 5 byte × 6  
( interleave) = 30 byte]  
If the error of read sector keeps allowable error byte number,  
correction is performed.  
However, if error byte exceeds its allowable number, correction  
may not be performed properly.  
Hot temperature  
5-1  
5-5  
To prevent injury, do not handle the drive until after the device has  
cooled sufficiently after turning off the power. The DE and LSI  
become hot during operation and remain hot immediately after  
turning off the power.  
Data loss  
1. The user must not change the setting of terminals not described  
in this section. Do not change setting status set at factory  
shipment.  
2. Do not change the setting of terminals except following setting  
pins during the power is turned on.  
Write protect: CN2 9-10 (NP model only)  
3. To short the setting terminal, use the short plug attached when  
the device is shipped from the factory.  
5-11  
Damage  
1. Make sure that system power is off before connecting or  
disconnecting cables.  
2. Do not connect or disconnect cables when power is on.(except  
NC model)  
C141-E166  
v
Task  
Alert message  
Page  
5-11  
Mounting Installation  
Damage  
1. Be careful of the insertion orientation of the SCSI connectors.  
With the system in which terminating resistor power is supplied  
via the SCSI cable, if the power is turned on, the overcurrent  
protection fuse of the terminating resistor power supplier may  
be blown or the cable may be burnt if overcurrent protection is  
not provided.  
When the recommended parts listed in Table 4.2 are used,  
inserting the cables in the wrong direction can be prevented.  
2. To connect SCSI devices, be careful of the connection position  
of the cable. Check that the SCSI device with the terminating  
resistor is the last device connected to the cable.  
6-4  
Data loss  
When the SEND DIAGNOSTIC command terminates with the  
CHECK CONDITION status, the INIT must collect the error  
information using the REQUEST SENSE command. The RECEIVE  
DIAGNOSTIC RESULTS command cannot read out the error  
information detected in the self-diagnostics.  
Caution  
6-5  
6-6  
1. To avoid shocks, turn off the power before connecting or  
disconnecting a cable, connector, or plug.  
2. To avoid injury, do not touch the mechanical assembly during  
disk drive operation.  
3. Do not use solvents to clean the disk drive.  
Caution  
1. Always ground yourself with a wrist strap connected to ground  
before handling. ESD (Electrostatics Discharge) may cause  
the damage to the device.  
2. To prevent electrical damage to the disk drive, turn the power  
off before connecting or disconnecting a cable, connector, or  
plug.  
3. Do not remove a PCA. This operation is required to prevent  
unexpected or unpredictable operation.  
4. Do not use a conductive cleaner to clean a disk drive assembly.  
5. Ribbon cables are marked with a colored line. Connect the  
ribbon cable to a cable connector with the colored wire  
connected to pin 1.  
Damage  
6-6  
Never open the disk enclosure in the field. Opening the disk  
enclosure may cause an irreparable fault.  
6-15  
Data loss  
6-7  
Save data stored on the disk drive before requesting repair. Fujitsu  
does not assume responsibility if data is destroyed during servicing  
or repair.  
vi  
C141-E166  
MANUAL ORGANIZATION  
PRODUCT/  
MAINTENANCE  
MANUAL  
1. General Description  
2. Specifications  
3. Data Format  
4. Installation Requirements  
5. Installation  
(This manual)  
6. Diagnostics and Maintenance  
7. Error Analysis  
SCSI Physical  
Interface  
1. SCSI Bus  
2. SCSI Message  
Specifications  
3. SCSI Bus Error Recovery Processing  
SCSI Logical  
Interface  
Specifications  
1. Command Processing  
2. Data Buffer Management  
3. Command Specification  
4. Sense Data and error Recovery Procedure  
5. Disk Medium Management  
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vii  
This page is intentionally left blank.  
CONTENTS  
page  
CHAPTER 1 GENERAL DESCRIPTION ............................................................................1-1  
1.1  
1.2  
1.3  
Standard Features..............................................................................................................1-2  
Hardware Structure............................................................................................................1-6  
System Configuration........................................................................................................1-9  
CHAPTER 2 SPECIFICATIONS...........................................................................................2-1  
2.1  
Hardware Specifications....................................................................................................2-1  
Model name and order number..........................................................................................2-1  
Function specifications......................................................................................................2-2  
Environmental specifications ............................................................................................2-4  
Error rate ...........................................................................................................................2-5  
Reliability..........................................................................................................................2-5  
SCSI Function Specifications............................................................................................2-7  
2.1.1  
2.1.2  
2.1.3  
2.1.4  
2.1.5  
2.2  
CHAPTER 3 DATA FORMAT...............................................................................................3-1  
3.1  
Data Space.........................................................................................................................3-1  
Cylinder configuration.......................................................................................................3-1  
Alternate spare area...........................................................................................................3-4  
Track format......................................................................................................................3-5  
Sector format.....................................................................................................................3-7  
Format capacity.................................................................................................................3-9  
Logical Data Block Addressing.........................................................................................3-9  
Defect Management...........................................................................................................3-11  
Defect list ..........................................................................................................................3-11  
Alternate block allocation .................................................................................................3-11  
3.1.1  
3.1.2  
3.1.3  
3.1.4  
3.1.5  
3.2  
3.3  
3.3.1  
3.3.2  
CHAPTER 4 INSTALLATION REQUIREMENTS .............................................................4-1  
4.1  
Mounting Requirements ....................................................................................................4-1  
External dimensions ..........................................................................................................4-1  
Mounting...........................................................................................................................4-4  
Notes on mounting ............................................................................................................4-4  
Power Supply Requirements .............................................................................................4-8  
Connection Requirements..................................................................................................4-11  
SCA2 connector type 16-bit SCSI model (NC model)......................................................4-11  
4.1.1  
4.1.2  
4.1.3  
4.2  
4.3  
4.3.1  
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ix  
4.3.2  
4.3.3  
4.3.4  
68 pin connector type 16-bit SCSI model (NP model)......................................................4-13  
Cable connector requirements ...........................................................................................4-20  
External operator panel (on NP model drives only) ..........................................................4-21  
CHAPTER 5 INSTALLATION...............................................................................................5-1  
5.1  
Notes on Handling Drives .................................................................................................5-1  
Connections.......................................................................................................................5-3  
Setting Terminals ..............................................................................................................5-5  
SCSI ID setting..................................................................................................................5-6  
Each mode setting .............................................................................................................5-8  
Mode settings ....................................................................................................................5-10  
Mounting Drives................................................................................................................5-11  
Check before mounting .....................................................................................................5-11  
Mounting procedures.........................................................................................................5-11  
Connecting Cables.............................................................................................................5-12  
Confirming Operations after Installation and Preparation for use.....................................5-13  
Confirming initial operations.............................................................................................5-13  
Checking SCSI connection................................................................................................5-14  
Formatting.........................................................................................................................5-17  
Setting parameters.............................................................................................................5-19  
Dismounting Drives...........................................................................................................5-23  
Spare Disk Drive...............................................................................................................5-23  
5.2  
5.3  
5.3.1  
5.3.2  
5.3.3  
5.4  
5.4.1  
5.4.2  
5.5  
5.6  
5.6.1  
5.6.2  
5.6.3  
5.6.4  
5.7  
5.8  
CHAPTER 6 DIAGNOSTICS AND MAINTENANCE ........................................................6-1  
6.1  
Diagnostics........................................................................................................................6-1  
Self-diagnostics .................................................................................................................6-1  
Test programs....................................................................................................................6-4  
Maintenance Information ..................................................................................................6-5  
Precautions........................................................................................................................6-5  
Maintenance requirements.................................................................................................6-6  
Maintenance levels............................................................................................................6-8  
Revision numbers..............................................................................................................6-9  
Tools and test equipment...................................................................................................6-10  
Tests ..................................................................................................................................6-10  
Operation Check................................................................................................................6-12  
Initial seek operation check...............................................................................................6-12  
Operation test ....................................................................................................................6-12  
6.1.1  
6.1.2  
6.2  
6.2.1  
6.2.2  
6.2.3  
6.2.4  
6.2.5  
6.2.6  
6.3  
6.3.1  
6.3.2  
x
C141-E166  
6.3.3  
6.4  
Diagnostic test...................................................................................................................6-12  
Troubleshooting Procedures..............................................................................................6-13  
Outline of troubleshooting procedures ..............................................................................6-13  
Troubleshooting with disk drive replacement in the field .................................................6-13  
Troubleshooting at the repair site......................................................................................6-15  
Troubleshooting with parts replacement in the factory .....................................................6-16  
Finding possibly faulty parts .............................................................................................6-16  
6.4.1  
6.4.2  
6.4.3  
6.4.4  
6.4.5  
CHAPTER 7 ERROR ANALYSIS .........................................................................................7-1  
7.1  
Error Analysis Information Collection ..............................................................................7-1  
Sense data..........................................................................................................................7-1  
Sense key, sense code, and subsense code ........................................................................7-1  
Sense Data Analysis ..........................................................................................................7-3  
Error information indicated with sense data......................................................................7-3  
Sense data (3-0C-03), (4-40-xx), (4-44-xx), and (4-C4-xx) ..............................................7-4  
Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error ....................................7-4  
Sense data (5-2x-xx), (5-3D-00), (5-90-00), (B-47-xx), (B-49-00),  
7.1.1  
7.1.2  
7.2  
7.2.1  
7.2.2  
7.2.3  
7.2.4  
(B-4D-xx) and (B-4E-00): SCSI interface error...............................................................7-4  
APPENDIX A SETTING TERMINALS..................................................................................A-1  
A.1 Setting Terminals (on NP model only)..............................................................................A-2  
APPENDIX B CONNECTOR SIGNAL ALLOCATION.......................................................B-1  
B.1  
B.2  
SCSI Connector Signal Allocation: SCA2 type LVD 16-bit SCSI...................................B-2  
SCSI Connector Signal Allocation: 68 pin type LVD 16-bit SCSI ..................................B-3  
INDEX ........................................................................................................................................IN-1  
C141-E166  
xi  
FIGURES  
page  
Figure 1.1  
Figure 1.2  
Figure 1.3  
Figure 1.4  
NC model drives outer view.................................................................................................1-6  
NP model drives outer view .................................................................................................1-6  
Disk/head configuration........................................................................................................1-7  
System configuration............................................................................................................1-9  
Figure 3.1  
Figure 3.2  
Figure 3.3  
Figure 3.4  
Figure 3.5  
Figure 3.6  
Figure 3.7  
Figure 3.8  
Cylinder configuration..........................................................................................................3-2  
Spare area in cell ..................................................................................................................3-5  
Alternate cylinder .................................................................................................................3-5  
Track format.........................................................................................................................3-6  
Track skew/head skew..........................................................................................................3-7  
Sector format ........................................................................................................................3-7  
Alternate block allocation by FORMAT UNIT command .................................................3-13  
Alternate block allocation by REASSIGN BLOCKS command ........................................3-14  
Figure 4.1  
Figure 4.2  
Figure 4.3  
Figure 4.4  
Figure 4.5  
Figure 4.6  
Figure 4.7  
Figure 4.8  
Figure 4.9  
NC external dimensions........................................................................................................4-2  
NP external dimensions........................................................................................................4-3  
IDD orientations...................................................................................................................4-4  
Mounting frame structure .....................................................................................................4-5  
Limitation of side-mounting .................................................................................................4-5  
Surface temperature measurement points .............................................................................4-6  
Service clearance area ..........................................................................................................4-7  
Spin-up current waveform (+12 VDC).................................................................................4-8  
Power on/off sequence (1)....................................................................................................4-8  
Figure 4.10 Power on/off sequence (2)....................................................................................................4-9  
Figure 4.11 Power on/off sequence (3)....................................................................................................4-9  
Figure 4.12 AC noise filter (recommended) ..........................................................................................4-11  
Figure 4.13 NC connectors location ......................................................................................................4-11  
Figure 4.14 SCA2 type 16-bit SCSI connector......................................................................................4-12  
Figure 4.15 NP connectors and terminals location ................................................................................4-13  
Figure 4.16 68 pin type 16-bit SCSI interface connector.......................................................................4-14  
Figure 4.17 Power supply connector (68 pin type 16-bit SCSI) ............................................................4-14  
Figure 4.18 External operator panel connector (CN1)...........................................................................4-15  
Figure 4.19 External operator panel connector (CN2)...........................................................................4-15  
xii  
C141-E166  
Figure 4.20 16-bit SCSI ID external input.............................................................................................4-16  
Figure 4.21 Output signal for external LED ..........................................................................................4-18  
Figure 4.22 SCSI cables connection ......................................................................................................4-19  
Figure 4.23 External operator panel circuit example .............................................................................4-21  
Figure 5.1  
Figure 5.2  
Figure 5.3  
Figure 5.4  
Figure 5.5  
SCSI bus connections ..........................................................................................................5-4  
Setting terminals location (on NP models only) ...................................................................5-5  
CN2 setting terminal (on NP models only)...........................................................................5-6  
Checking the SCSI connection (A).....................................................................................5-15  
Checking the SCSI connection (B).....................................................................................5-16  
Figure 6.1  
Figure 6.2  
Figure 6.3  
Revision label.......................................................................................................................6-9  
Indicating revision numbers................................................................................................6-10  
Test flowchart.....................................................................................................................6-11  
Figure 7.1  
Format of extended sense data..............................................................................................7-2  
C141-E166  
xiii  
TABLES  
page  
Table 2.1 Model names and order numbers..............................................................................................2-1  
Table 2.2 Function specifications.............................................................................................................2-2  
Table 2.3 Environmental/power requirements..........................................................................................2-4  
Table 2.4 SCSI function specifications.....................................................................................................2-7  
Table 3.1 Zone layout and track capacity.................................................................................................3-3  
Table 3.4 Format capacity ........................................................................................................................3-9  
Table 4.1 Surface temperature check point...............................................................................................4-6  
Table 4.2 Recommended components for connection............................................................................4-20  
Table 5.1 SCSI ID setting.........................................................................................................................5-7  
Table 5.2 Setting SCSI terminator power supply (NP model)..................................................................5-8  
Table 5.3 Motor start mode setting...........................................................................................................5-8  
Table 5.4 Write protect setting (NP model)..............................................................................................5-9  
Table 5.5 Setting of the SCSI interface operation mode (NP model).......................................................5-9  
Table 5.6 Setting the bus width of the SCSI interface (NP model)..........................................................5-9  
Table 5.7 Default mode settings (by CHANGE DEFINITION command) ............................................5-10  
Table 5.8 Setting check list (NP model only).........................................................................................5-11  
Table 6.1 Self-diagnostic functions ..........................................................................................................6-1  
Table 6.2 System-level field troubleshooting .........................................................................................6-14  
Table 6.3 Disk drive troubleshooting .....................................................................................................6-15  
Table 7.1 Definition of sense data ............................................................................................................7-3  
Table A.1  
CN2 setting terminal (on NP model drives only).................................................................A-2  
Table B.1 SCSI connector (SCA2 type LVD 16-bit SCSI): CN1 ...........................................................B-2  
Table B.2 SCSI connector (68 pin type LVD 16-bit SCSI): CN1...........................................................B-3  
xiv  
C141-E166  
CHAPTER 1  
GENERAL DESCRIPTION  
1.1  
1.2  
1.3  
Standard Features  
Hardware Structure  
System Configuration  
This chapter describes the feature and configuration of the MAP series intelligent disk drives (IDD).  
IDDs are high performance large capacity 3.5 type fixed disk drives with an embedded SCSI controller.  
The MAP series disk drives support the Small Computer System Interface (SCSI) as described in the ANSI  
SCSI SPI-4 [T10/1365D Rev.7] to the extent described in this manual.  
The flexibility and expandability of the SCSI, as well as the powerful command set of the IDD, allow the  
user to construct a high-performance reliable disk subsystem with large storage capacity.  
The data format can be changed from the format at factory shipment by reinitializing with the user's system.  
Refer to SCSI Logical Interface Specifications for details.  
C141-E166  
1-1  
1.1  
Standard Features  
(1)  
Compactness  
Since the SCSI controller circuit is embedded in the standard 3.5 type fixed disk drive form factor,  
the IDD is extremely compact. The IDD can be connected directly to the SCSI bus of the host  
system.  
(2)  
SCSI standard  
The IDD provides not only SCSI basic functions but also the following features:  
Arbitration  
Disconnection/Reconnection  
Data bus parity  
The SCSI commands can manipulate data through logical block addressing regardless of the  
physical characteristics of the disk drive. This allows software to accommodate future expansion  
of system functions.  
(3)  
8-bit SCSI/16-bit SCSI  
The IDD has 16-bit data bus width (16-bit SCSI), which have the wide transfer function suitable  
for SCSI-2. 8-bit data bus is available only with NP model.  
See subsection 5.3.2 for details of the bus width setting.  
For the ultra SCSI model, number of connectable SCSI devices on the same SCSI bus is varied as  
follows.  
8-bit SCSI:  
16-bit SCSI:  
8 drives max. (option for NP model)  
16 drives max.  
(4)  
High speed data transfer  
Such a high data transfer rate on the SCSI bus can be useful with the large capacity buffer in the  
IDD.  
8-bit SCSI:  
The data transfer rate on the SCSI bus is 40 MB/s maximum at the  
synchronous mode.  
16-bit SCSI:  
The data transfer rate on the SCSI bus is 320 MB/s maximum at the paced  
transfer synchronous mode.  
1-2  
C141-E166  
Note:  
The maximum data transfer rate in asynchronous mode may be limited by the response time of  
initiator and the length of SCSI bus length. The maximum data transfer rate in synchronous  
mode may be limited by the cable length, transmission characteristics of the SCSI bus and the  
connected SCSI device number.  
(5)  
Continuous block processing  
The addressing method of data blocks is logical block address. The initiator can access data by  
specifying block number in a logically continuous data space without concerning the physical  
structure of the track or cylinder boundaries.  
The continuous processing up to [64K-1] blocks in a command can be achieved, and IDD can perform  
continuous read/write operation when processing data blocks on several tracks or cylinder.  
(6)  
Programmable multi-segment data buffer  
The data buffer is 8M bytes. Data is transferred between SCSI bus and disk media through this  
data buffer. This feature provides the suitable usage environment for users.  
Since the initiator can control the disconnect/reconnect timing on the SCSI bus by specifying the  
condition of stored data to the data buffer or empty condition of the data buffer, the initiator can  
perform the effective input/output operations with utilizing high data transfer capability of the  
SCSI bus regardless of actual data transfer rate of the disk drive.  
(7)  
Cache feature  
After executing the READ command, the IDD reads automatically and stores (prefetches) the  
subsequent data blocks into the data buffer (Read-ahead caching).  
The high speed sequential data access can be achieved by transferring the data from the data buffer  
without reaccessing the disk in case the subsequent command requests the prefetched data blocks.  
IMPORTANT  
You should ensure that the cashed data is surely flushed to the disc  
media before you turn off the drive's power.  
To ensure it, you should issue either the SYNCHRONIZE CASHE  
command or the STOP UNIT command and then confirm that the  
command is surely terminated with the GOOD STATUS.  
(8)  
Command queuing feature  
The IDD can queue maximum 128 commands, and optimizes the issuing order of queued  
commands by the reordering function. This feature realizes the high speed processing.  
C141-E166  
1-3  
(9)  
Reserve and release functions  
The IDD can be accessed exclusively in the multi-host or multi-initiator environment by using the  
reserve and release functions.  
(10)  
Error recovery  
The IDD can try to recover from errors in SCSI bus or the disk drive using its powerful retry  
processing. If a recoverable data check occurs, error-free data can be transferred to the initiator  
after being corrected in the data buffer. The initiator software is released from the complicated  
error recover processing by these error recovery functions of the IDD.  
(11)  
(12)  
Automatic alternate block reassignment  
If a defective data block is detected during read or write the IDD can automatically reassign its  
alternate data block.  
Programmable data block length  
Data can be accessed in fixed-block length units. The data block length is programmable, and can  
be specified at initializing with a multiple of four within the range of 512 to 528 bytes.  
IMPORTANT  
Error rate increase  
1. The drive format at factory shipment is generally 512 byte.  
2. The Recoverable Error of the drive might increase when the  
format would be modified from 512 bytes to the following values:  
516 bytes, 520 bytes, 524 bytes, 528 bytes.  
3. The Recoverable Error referred to here is sense data (1-13-xx).  
(13)  
(14)  
Defective block slipping  
A logical data block can be reallocated in a physical sequence by slipping the defective data block  
at formatting. This results in high speed contiguous data block processing without a revolution  
delay due to defective data block.  
High speed positioning  
A rotary voice coil motor achieves fast positioning.  
1-4  
C141-E166  
(15)  
Large capacity  
A large capacity can be obtained from 3.5 inch disk drives by dividing all cylinders into several  
partitions and changing the recording density on each partition (constant density recording). The  
disk subsystem with large capacity can be constructed in the good space efficiency.  
(16)  
(17)  
Start/Stop of spindle motor  
Using the SCSI command, the host system can start and stop the spindle motor.  
Diagnosis  
The IDD has a diagnostic capability which checks internal controller functions and drive  
operations to facilitate testing and repair.  
(18)  
Low power consumption  
By using highly integrated LSI components, the power consumption of the IDD is very low, and  
this enables the unit to be used in wide range of environmental conditions.  
(19)  
(20)  
Low noise and low vibration  
The noise level is low; approx. 3.4 Bels Ready for MAP series. This makes it ideal for office use.  
Microcode downloading  
The IDD implements the microcode download feature. This feature achieves easy maintainability  
of the IDD and function enhancing.  
C141-E166  
1-5  
1.2  
Hardware Structure  
An outer view of the IDD is given in Figures 1.1 and 1.2. The IDD is composed of the disk, head,  
spindle motor, mounted disk enclosure (DE) with actuator and air circulation filter, as well as  
read/write pre-amp with the printed circuit assembly (PCA) of the controller.  
Figure 1.1 NC model drives outer view  
Figure 1.2 NP model drives outer view  
1-6  
C141-E166  
(1)  
Disks  
The disks have an outer diameter of 84 mm (3.3 inch) and an inner diameter of 25 mm (0.98 inch)  
for MAP series. The disks are good for at least 20,000 contact starts and stops. Each model  
contains following number of disks.  
MAP3147NC/NP: 4  
MAP3735NC/NP: 2  
MAP3367NC/NP: 1  
(2)  
Heads  
The MR (Magnet - Resistive) of the CSS (contact start/stop) type heads are in contact with the  
disks when the disks are not rotating, and automatically float when the rotation is started. Figure  
1.3 shows the configuration of disks and heads  
MAP3147NC/NP  
MAP3735NC/NP  
Base  
0
1
0
1
2
3
4
5
6
7
2
3
MAP3367NC/NP  
Cover  
0
1
Figure 1.3 Disk/head configuration  
(3)  
(4)  
Spindle motor  
The disks are rotated by a direct-drive hall-less DC motor. The motor speed is controlled by a  
feedback circuit using the counter electromotive current to precisely maintain of the specified  
speed.  
Actuator  
The actuator, which uses a rotary voice coil motor (VCM), consumes little power and generates  
little heat. The heads at the end of the actuator arm is controlled and positioned via feedback of  
servo information in the data.  
The heads are positioned on the CCS zone over the disks when the power is off or the spindle  
motor is stopped.  
C141-E166  
1-7  
(5)  
Air circulation (recirculation filter, breather filter)  
The disk enclosure (DE) configures a clean room to keep out particle and other contaminants. The  
DE has a closed-loop air recirculation system. Using the movement of the rotating disks, air is  
continuously cycled through a filter. This filter will trap any particle floating inside the enclosure  
and keep the air inside the DE contaminant free. To prevent negative pressure in the vicinity of the  
spindle when the disks begin rotating, a breather filter is attached. The breather filter also  
equalizes the internal air pressure with the atmospheric pressure due to surrounding temperature  
changes.  
(6)  
(7)  
Read/write circuit  
The read/write circuit utilizes a read channel mounted with a head IC that supports high-speed  
transmission and an MEEPR4ML (Modified Enhanced Extended Partial Response Class 4  
Maximum Likelihood) modulation/demodulation circuit in order to prevent errors being triggered  
by external noise and to improve data reliability.  
Controller circuit  
The controller circuit uses LSIs to increase the reliability and uses a high speed microprocessing  
unit (MPU) to increase the performance of the SCSI controller.  
1-8  
C141-E166  
1.3  
System Configuration  
Figure 1.4 shows the system configuration. The IDDs are connected to the SCSI bus of host  
systems and are always operated as target. The IDDs perform input/output operation as specified  
by SCSI devices which operate as initiator.  
SCSI bus  
Figure 1.4 System configuration  
C141-E166  
1-9  
(1)  
SCSI bus configuration  
Up to eight SCSI devices operating as an initiator or a target can be connected to the SCSI bus for  
the 8-bit SCSI and up to 16 SCSI devices operating as an initiator or a target can be connected to  
the SCSI bus for the 16-bit SCSI in any combination.  
For example, the system can be configured as multi-host system on which multiple host computers  
that operate as initiator or connected through the SCSI bus.  
Using disconnect/reconnect function, concurrent input/output processing is possible on multi-SCSI  
devices.  
(2)  
Addressing of peripheral device  
Each SCSI device on the bus has its own unique address (SCSI ID:#n in Figure 1.4). For  
input/output operation, a peripheral device attached to the SCSI bus that operates as target is  
addressed in unit called as logical unit. A unique address (LUN: logical unit number) is assigned  
for each logical unit.  
The initiator selects one SCSI device by specifying that SCSI ID, then specifies the LUN to select  
the peripheral device for input/output operation.  
The IDD is constructed so that the whole volume of disk drive is a single logical unit, the  
selectable number of SCSI ID and LUN are as follows:  
SCSI ID:  
LUN:  
8-bit SCSI:Selectable from 0 to 7 (option for NP model, switch selectable)  
16-bit SCSI:Selectable from 0 to 15 (switch selectable)  
0 (fixed)  
1-10  
C141-E166  
CHAPTER 2  
SPECIFICATIONS  
2.1  
2.2  
Hardware Specifications  
SCSI Function Specifications  
This chapter describes specifications of the IDD and the functional specifications of the SCSI.  
2.1  
Hardware Specifications  
2.1.1  
Model name and order number  
Each model has a different recording capacities and interface connector type when shipped. Table  
2.1 lists the model name and order number.  
The data format can be changed by reinitializing with the user's system.  
Table 2.1  
Model names and order numbers  
Model name  
Order number  
SCSI type  
Capacity  
(user area)  
Number of  
disks  
Number  
of heads  
MAP3147NC  
MAP3147NP  
MAP3735NC  
MAP3735NP  
MAP3367NC  
MAP3367NP  
CA06200-B400  
CA06200-B460  
CA06200-B200  
CA06200-B260  
CA06200-B100  
CA06200-B160  
SCA2, LVD  
68-pin, LVD  
SCA2, LVD  
68-pin, LVD  
SCA2, LVD  
68-pin, LVD  
147.01 GB  
73.50 GB  
36.74 GB  
4
2
1
8
4
2
C141-E166  
2-1  
2.1.2  
Function specifications  
Table 2.2 shows the function specifications of the IDD.  
Table 2.2  
Function specifications  
Specification  
MAP3735NC/NP  
73.50 GB  
Item  
MAP3147NC/NP  
MAP3367NC/NP  
Formatted capacity/device (*1)  
Number of disks  
147.01 GB  
36.74 GB  
4
8
2
1
2
Number of heads  
4
Number of cylinders (*2)  
Formatted capacity/track (B)  
Number of rotations min-1 (rpm)  
Average latency time  
Track to Track  
47,926  
47,996  
48,122  
272,896 to 479,232  
10,025 0.2%  
2.99 msec  
0.3 ms/0.5 ms  
4.5 ms/5.0 ms  
10.0 ms/11.0 ms  
Seek time (*3)  
(Read/Write)  
Average  
Full stroke  
Start time  
Stop time  
30 s typ. (60 s max.)  
30 s typ.  
Start/stop time  
(*4)  
Recording mode  
32/34 MEEPRML  
25.4 mm  
Height:  
Width:  
Depth:  
External  
dimensions  
101.6 mm  
146.0 mm  
Weight (max)  
0.75 kg  
Power consumption (*5)  
Fast 5 SCSI  
9.5 W  
6.6 W  
5.8 W  
Cable length: 6 m max  
Cable length: 3 m max  
Single- Fast 10 SCSI  
Ended  
Inter-  
face  
Cable length: 3 m max (*6)  
Cable length: 1.5 m max (*7)  
Fast 20 SCSI  
Cable length: 25 m max (*8)  
Cable length: 12 m max (*9)  
LVD  
U160  
Disk drive  
Data  
transfer  
rate (*10)  
64.1 to 107.86 MB/s  
320 MB/s max.  
Synchronous  
SCSI  
mode  
Logical data block length (*11)  
SCSI command specification  
512 to 528 byte (Fixed length)  
SPI-4 (T10/1365D Rev.7), SAM-2 (T10/1157D Rev.20),  
SPC-2 (T10/1236D Rev.20), SBC (T10/996D Rev.8c)  
Data buffer  
8 MB FIFO ring buffer  
3.4 Bels  
Acostic noise (Ready)  
2-2  
C141-E166  
(*1)  
The formatted capacity can be changed by changing the logical block length and using spare sector  
space. See Chapter 3 for the further information. The formatted capacity listed in the table is an  
estimate for 512 bytes per sector.  
(*2)  
(*3)  
The number of user cylinders indicates the max., and includes the alternate cylinder. The number  
of user cylinders and alternate cylinders can be specified at format of the IDD.  
The positioning time is as follows:  
Seek Difference [2048 Cyl/div]  
(*4)  
The start time is the time from power on or start command to when the IDD is ready, and the stop  
time is the time for disks to completely stop from power off or stop command.  
(*5)  
(*6)  
(*7)  
(*8)  
(*9)  
(*10)  
This value indicates at ready mode.  
Up to 4 SCSI devices having capacitance of 25pF or less can use cable length of up to 3.0 m.  
5 to 8 SCSI devices having capacitance of 25pF or less can use cable length of up to 1.5 m.  
1 on 1 connection case.  
1 host, 15 devices case.  
The maximum data transfer rate may be restricted to the response speed of initiator and by  
transmission characteristics.  
(*11)  
The terminator power pin (SCSI connector) which supplies power to other terminators is not used.  
C141-E166  
2-3  
2.1.3  
Environmental specifications  
Table 2.3 lists environmental and power requirements.  
Table 2.3  
Environmental/power requirements  
Specification  
MAP3735NC/NP  
5 to 55°C  
Item  
MAP3147NC/NP  
MAP3367NC/NP  
Operating  
Non-operating  
–40 to 70°C  
Transport  
Temperature  
(*1)  
–40 to 70°C  
5 to 60°C  
(within a week)  
DE surface temperature  
at operating  
Gradient  
Operating  
Non operating  
15°C/h or less  
5 to 95%RH  
5 to 95%RH  
Relative  
humidity  
Transport  
5 to 95%RH  
(within a week)  
Maximum wet bulb  
temperature  
29°C (no condensation)  
Operating (*3)  
Non-operating (*4)  
Transport (packaged)  
Operating  
Non-operating  
Transport (packaged)  
Operating  
0.3 mm (5 to 20Hz)/9.8 m/s2 (1G) (20 to 300 Hz) or less  
3.1 mm (5 to 20Hz)/49m/s2 (5G) (20 to 300Hz) or less  
3.1 mm (5 to 20Hz)/49m/s2 (5G) (20 to 300Hz) or less  
637.4m/s2 (65G) (2 ms)  
Vibration  
(*2)  
Shock (*2)  
1961.3m/s2 (200G) (2 ms)  
1961.3m/s2 (200G) (2 ms)  
Altitute  
(above sea  
level)  
–300 m to 3,000 m  
Non-operating  
–300 m to 12,000 m  
Ready  
(Average)  
Peak within  
0.65 A  
0.90 A  
0.42 A  
3.0 A  
0.33 A  
0.55 A  
100 µs at  
+12 VDC  
spin-up  
5%  
Random  
W/R  
(about 80  
IOPS)  
Power  
requirements  
Input power  
(*5)  
0.65 A  
0.38 A  
Ready  
Random  
W/R  
(about 80  
+5 VDC  
5% (*6)  
0.70 A  
IOPS)  
Ripple (*7)  
+5 V/+12 V 250 mVp-p  
(*1)  
(*2)  
For detail condition, see Section 4.1.  
Vibration applied to the drive is measured at near the mounting screw hole on the frame as much  
as possible.  
(*3)  
At random seek write/read and default on retry setting with log sweep vibration.  
2-4  
C141-E166  
(*4)  
At power-off state after installation  
Vibration displacement should be less than 2.5 mm.  
(*5)  
(*6)  
Input voltages are specified at the drive connector side, during drive ready state.  
The terminator power pin (SCSI connector) which supplies power to other terminators is not used  
(See Section 4.3).  
(*7)  
High frequency noise (over 20 MHz) is less than 100 mVp-p.  
2.1.4  
Error rate  
Errors detected during initialization and replaced by alternate block assignments are not included  
in the error rate. Data blocks to be accessed should be distributed over the disk medium equally.  
(1)  
Unrecoverable error rate  
Errors which cannot be recovered within 63 retries and ECC correction should not exceed 1 per  
1015 bits.  
CAUTION  
Data loss  
For MAP series, Reed Solomon codes are applied for their ECC.  
The sector-data is divided into 6 interleaving sectors, and ECC is  
performed in each sector where the maximum number of errors (up  
to 5 byte) can be corrected. [Total maximum byte: 5 byte × 6 (  
interleave) = 30 byte]  
If the error of read sector keeps allowable error byte number,  
correction is performed. However, if error byte exceeds its  
allowable number, correction may not be performed properly.  
(2)  
Positioning error rate  
Positioning errors which can be recovered by one retry should be 10 or less per 108 seeks.  
2.1.5  
Reliability  
(1)  
Mean Time Between Failures (MTBF)  
MTBF of the IDD during its life time is 1,2000,000 hours (operating: 24 hours/day, 7 days/week  
average DE surface temperature: 50°C or less).  
Note:  
The MTBF is defined as:  
Operating time (hours) at all field sites  
MTBF=  
The number of equipment failures from all field sites  
C141-E166  
2-5  
Failure of the equipment means failure that requires repair, adjustments, or replacement.  
Mishandling by the operator, failures due to bad environmental conditions, power trouble, host  
system trouble, cable failures, or other failures not caused by the equipment are not considered.  
(2)  
(3)  
Mean Time to Repair (MTTR)  
MTTR is the average time taken by a well-trained service mechanic to diagnose and repair a drive  
malfunction. The drive is designed for a MTTR of 30 minutes or less.  
Service life  
The service life under suitable conditions and treatment is as follows.  
The service life is depending on the environment temperature. Therefore, the user must design the  
system cabinet so that the average DE surface temperature is as possible as low.  
DE surface temperature: 40°C or less  
DE surface temperature: 41°C to 45°C  
DE surface temperature: 46°C to 50°C  
DE surface temperature: 51°C to 55°C  
DE surface temperature: 56°C to 60°C  
DE surface temperature: 61°C and more  
5 years  
4.5 years  
4 years  
3.5 years  
3 years  
Strengthen cooling power so that DE surface  
temperature is 60°C or less.  
Even if the IDD is used intermittently, the longest service life is 5 years.  
Note:  
The "average DE surface temperature" means the average temperature at the DE surface  
throughout the year when the IDD is operating.  
(4)  
Data security at power failure  
Integrity of the data on the disk is guaranteed against all forms of DC power failure except on  
blocks where a write operation is being performed. The above does not applied to formatting  
disks or assigning alternate blocks.  
2-6  
C141-E166  
2.2  
SCSI Function Specifications  
Table 2.4 shows the SCSI functions provided with the IDD.  
Table 2.4  
SCSI function specifications  
Item  
Specification  
Single-ended type  
Ο
×
Ο
HVD type (High Voltage Differential)  
LVD type (Low Voltage Differential)  
Electrical  
requirements  
Position where the terminating  
resistor is mounted on the PCA  
Single-ended type  
Differential type  
×
×
(*1)  
Position where the terminating  
resistor is mounted on the PCA  
TERMPWR signal send function  
68 pin P cable connector  
80 pin SCA2 connector  
Ο
Ο (NP model)  
Connector  
Ο (NC model)  
Data bus parity (Data bus CRC)  
Bus arbitration function  
Ο
Ο
Ο
Disconnection/reconnection function  
#0 to #15  
(Jumper selection)  
SCSI ID  
16-bit SCSI  
Addressing  
LUN (logical unit number)  
#0 fixed  
Ο
Ο
Ο
Ο
Ο
Ο
20 MB/s max.  
40 MB/s max.  
40 MB/s max.  
80 MB/s max.  
160 MB/s max.  
320 MB/s max.  
8-bit SCSI (Single-ended type)  
(LVD type)  
16-bit SCSI (Single-ended type)  
(LVD type)  
Data transfer  
(Synchronous  
mode)  
(U160 LVD type)  
(U320 LVD type)  
Data buffer  
8 MB  
512 to 528 bytes  
(Fixed length)  
Data block length (Logical data length=Physical data length) (*2)  
Ο : Provided  
× : Not provided  
(*1) The driver mode (Single-ended or LVD) changes automatically by Diffsence signal level.  
(*2) Refer to (12) of Section 1.1.  
C141-E166  
2-7  
This page is intentionally left blank.  
CHAPTER 3  
DATA FORMAT  
3.1  
3.2  
3.3  
Data Space  
Logical Data Block Addressing  
Defect Management  
This chapter explains data space definition, logical data block addressing, and defect management on the  
IDD.  
3.1  
Data Space  
The IDD manages the entire data storage area divided into the following three data spaces.  
User space: Storage area for user data  
Internal test space: Reserved area for diagnostic purposes  
System space: Area for exclusive use of IDD itself  
The user space allows a user access by specifying data. These space can be accessed with the  
logical data block addressing method described in Section 3.2. The internal test space is used by  
Read/write test of self-diagnostics test, but user can’t use direct access. The system space is  
accessed inside the IDD at power-on or during the execution of a specific command, but the user  
cannot directly access the system space.  
3.1.1  
Cylinder configuration  
The IDD allocates cylinders to the user space, Internal test space, and system space. Figure 3.1 is  
the cylinder configuration.  
Spare areas (alternate areas) for defective sectors are provided in the user space. Several sectors in  
the last track of one cylinder and several cylinders (alternate cylinders) in the user space are  
allocated as alternate areas according to the user's assignment (MODE SELECT command). See  
Subsection 3.1.2 for details.  
C141-E166  
3-1  
Cylinder –85  
to  
Internal test cylinder  
SAS69  
Internal test space  
System space  
~
~
~
~
Cylinder –78  
Cylinder –73  
to  
Cylinder –4  
~
~
~
~
SA0  
Zone  
Cell  
0
Cylinder  
0
1
.
User Space for Cell 0-0  
13  
Spare Sectors per Cell 0  
14  
15  
.
1
User Space for Cell 1-0  
Spare Sectors per Cell 1  
User space  
0
27  
(Primary  
Cylinder  
0 - (n - 1))  
.
m-13  
P1  
User Space for Cell P1-0  
Spare Sectors per Cell P1  
.
m
(1)  
Alternate Cylinder  
User Space for Cell xx-1  
1
.
.
n
17  
User Space for Cell yy-17  
n =47,925 (MAP3147NC/NP)  
47,995 (MAP3735NC/NP)  
48,121 (MAP3367NC/NP)  
Note: Spare sectors on the last track in each cylinder are not necessarily placed at the end of the track  
because of a track skew or a cylinder skew. (Details are explained in Subsection 3.1.3.)  
Figure 3.1 Cylinder configuration  
Apart from the above logical configuration, the IDD intends to increase the storage capacity by  
dividing all cylinders into several zones and changing a recording density of each zone. Tables 3.1  
to 3.3 show the zone layout and the track capacity.  
3-2  
C141-E166  
Table 3.1  
Zone layout and track capacity  
Cylinder  
Zone  
Byte/track  
Sector/track  
MAP3147NC/NP MAP3735NC/NP MAP3367NC/NP  
0 - 1,120  
0
1
479,232  
465,920  
459,264  
452,608  
439,296  
425,984  
412,672  
402,432  
399,360  
379,392  
372,736  
359,424  
346,112  
330,240  
319,488  
299,520  
284,672  
272,896  
936  
910  
897  
884  
858  
832  
806  
786  
780  
741  
728  
702  
676  
645  
624  
585  
556  
533  
1,121 - 4,117  
2
4,118 - 6,078  
3
6,079 - 9,075  
4
9,076 - 12,884  
5
12,885 - 16,077  
16,078 - 19,270  
19,271 - 21,637  
21,638 - 24,354  
24,355 - 27,561  
27,562 - 29,256  
29,257 - 32,351  
32,352 - 34,942  
34,943 - 37,855  
37,856 - 41,062  
41,063 - 43,961  
43,962 - 46,342  
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
46,343 - 47,925  
46,343 - 47,995  
46,343 - 48,121  
Note: When the logical data block length is 512 bytes, the sector/track capacity indicates above amount  
(1)  
User space  
The user space is a storage area for user data. The data format on the user space (the length of data  
block and the number of data blocks) can be specified with the MODE SELECT or MODE  
SELECT EXTENDED command.  
The default value of cylinders in the user space is MAP3174NC/NP = 47,926, MAP3735NC/NP =  
47,996, MAP3367NC/NP = 48,122. These also equal the maximum cylinders number for each  
series. The user can also specify the number of logical data blocks to be placed in the user space  
with the MODE SELECT or MODE SELECT EXTENDED command. When the number of  
logical data blocks is specified, as many cylinders as required to place the specified data blocks are  
allocated in the user space.  
C141-E166  
3-3  
A number starting with 0 is assigned to each cylinder required in the user space in ascending order.  
If the number of cylinders do not reach the maximum, the rest of the cylinders will not be used.  
Always one cylinder that is located at the end of each zone in the user space can be established as  
an alternate cylinder. Alternate cylinders will be used for alternate blocks when primary cylinders  
in the user space are used up. See Subsections 3.1.2 and 3.3.2 for details.  
(2)  
(3)  
Internal test space  
The Internal test space is an area for diagnostic purposes only and its data block length is always  
512KByte. The Internal test space consists of 8 cylinders and outer-host cylinder is always  
assigned. The user cannot change the number of cylinders in the Internal test space or their  
positions.  
System space  
The system space is an area for exclusive use of the IDD itself and the following information are  
recorded.  
Defect list (P list and G list)  
MODE SELECT parameter (saved value)  
Statistical information (log data)  
Controller control information  
The above information is duplicated in several different locations for safety.  
Note:  
The system space is also called SA space.  
3.1.2  
Alternate spare area  
The alternate spare area consists of the last track of each cell in the user space and an alternate  
cylinder allocated to the last cylinder of each zone.  
The spare area in each cylinder is placed at the end of the last track as shown in Figure 3.2. These  
spare sectors are located in the end of the track logically, not necessarily located at the end  
physically because of track skew or cylinder skew. (Details are explained on Subsection 3.1.3.)  
Size can be specified by the MODE SELECT command.  
The number of spare sectors per cell can be specified exceeding 32. The default for the spare  
sectors number is 84.  
3-4  
C141-E166  
Cell  
Note: This drive manages alternate spare areas for each cell, which is a set of cylinders. One  
cell consists of 14 cylinders.  
Figure 3.2 Spare area in cell  
An alternate cylinder is used when spare sectors in a cell are used up or 0 is specified as the  
number of spare sectors in a cell. 1 cylinder at the end of each zone of the user space is allocated  
as alternate cylinders as shown in Figure 3.3.  
The user space and the system space share the alternate cylinders.  
Zone  
Note: The number of alternate cylinders can not be changed.  
Figure 3.3 Alternate cylinder  
Track format  
3.1.3  
(1)  
Physical sector allocation  
Figure 3.4 shows the allocation of the physical sectors in a track. The length in bytes of each  
physical sector and the number of sectors per track vary depending on the logical data block  
length. The unused area (G4) exists at the end of the track in formats with most logical data block  
lengths.  
The interval of the sector pulse (length of the physical sector) is decided by multiple of 40MHz  
free running frequency. This clock is not equal to the interval of the byte clock for each zone.  
Therefore, the physical sector length cannot be described with a byte length.  
C141-E166  
3-5  
5.99 msec  
Servo frame  
n = 241 (zone 0) ~ 408 (zone 17)  
Figure 3.4 Track format  
(2)  
Track skew and head skew  
To avoid waiting for one turn involved in head and cylinder switching, the first logical data block  
in each track is shifted by the number of sectors (track skew and head skew) corresponding to the  
switching time. Figure 3.5 shows how the data block is allocated in each track.  
At the head switching location in a cylinder, the first logical data block in track t + 1 is allocated at  
the sector position which locates the track skew behind the sector position of the last logical data  
block sector in track t.  
At the cylinder switching location, like the head switching location, the first logical data block in a  
cylinder is allocated at the sector position which locates the head skew behind the last logical  
sector position in the preceding cylinder. The last logical sector in the cylinder is allocated when  
formatting, and is an unused spare sector.  
3-6  
C141-E166  
Cylinder skew  
Head  
Cylinder skew  
Track skew  
Head  
Leading logical  
sector in head p+1  
Figure 3.5 Track skew/head skew  
The number of physical sectors (track skew factor and head skew factor) corresponding to the  
skew time varies depending on the logical data block length because the track skew and the head  
skew are managed for individual sectors. The IDD automatically determines appropriate values  
for the track skew factor and the head skew factor according to the specified logical data block  
length. The value can be read out by the MODE SENSE or MODE SENSE EXTENDED  
command after the track has been formatted.  
3.1.4  
Sector format  
Each sector on the track consists of an ID field, a data field, and a gap field which separates them.  
Figure 3.6 gives sector format examples.  
SCT  
SCT  
PLO  
SM1 DATA1 SM2 DATA2 BCRC ECC  
PAD  
G1 Sync  
G2  
Servo  
SCT  
G3  
SCT  
G1 Sync  
PLO  
PLO  
G1 Sync  
SM1 DATA1 SM2 DATA4 BCRC ECC  
SM1 DATA1 SM2 DATA3  
PAD  
PAD  
G2  
Figure 3.6 Sector format  
Each sector on the track consists of the following fields:  
C141-E166  
3-7  
(1)  
(2)  
(3)  
(4)  
Gaps (G1, G2, G3)  
No pattern is written on the gap field.  
PLO Sync  
In this field, pattern X'00' in the specified length in bytes is written.  
Sync Mark (SM1, SM2)  
In this field, special pattern in the specified length in bytes is written. This special pattern indicates  
the beginning of the data field.  
Data field (DATA1-DATA4)  
User data is stored in the data field of the sector. The length of the data field is equal to that of the  
logical data block which is specified with a parameter in the MODE SELECT command. Any  
multiple of 4 between 512 and 528 bytes can be specified as the length.  
(5)  
(6)  
(7)  
BCRC  
It is a 4-byte error detection code. Errors in the ID field. Single burst errors with lengths of up to  
32 bits for each logical block can be detected.  
ECC  
This is the 60-byte code that allows detection and correction of errors in the data field, which is  
capable of correcting the single burst error up to 240 bits max. on the fly.  
PAD  
In this field, pattern X'00' in the specified length in bytes is written. This field includes the  
variation by rotation and circuit delay till reading/writing.  
3-8  
C141-E166  
3.1.5  
Format capacity  
The size of the usable area for storing user data on the IDD (format capacity) varies according to  
the logical data block or the size of the spare sector area. Table 3.4 lists examples of the format  
capacity when the typical logical data block length and the default spare area are used. The  
following is the general formula to calculate the format capacity.  
[Number of sectors of each zone] = [number of sectors per track × number of tracks per cell –  
number of alternate spare sectors per cell] × [number of cells in the zone]  
[Formatted capacity] = [total of sectors of all zones] ÷ [number of physical sectors in logical  
block] × [logical data block length]  
The following formula must be used when the number of logical data blocks are specified with the  
parameter in the MODE SELECT or MODE SELECT EXTENDED command.  
[Format capacity] = [logical data block length] × [number of logical data blocks]  
The logical data block length, the maximum logical block address, and the number of the logical  
data blocks can be read out by a READ CAPACITY, MODE SENSE, or MODE SENSE  
EXTENDED command after initializing the disk medium.  
Table 3.4  
Format capacity  
Model  
Data heads Data block length  
8
User blocks  
287,132,440  
143,571,316  
71,775,284  
Format capacity (GB)  
MAP3147NC/NP  
MAP3735NC/NP  
MAP3367NC/NP  
147.01  
73.50  
36.74  
4
2
512  
Note:  
Total number of spare sectors is calculated by adding the number of spare sectors in each  
primary cylinder and the number of sectors in the alternate cylinders.  
3.2  
Logical Data Block Addressing  
Independently of the physical structure of the disk drive, the IDD adopts the logical data block  
addressing as a data access method on the disk medium. The IDD relates a logical data block  
address to each physical sector at formatting. Data on the disk medium is accessed in logical data  
block units. The INIT specifies the data to be accessed using the logical data block address of that  
data.  
The logical data block addressing is a function whereby individual data blocks are given addresses  
of serial binaries in each drive.  
C141-E166  
3-9  
(1)  
Block address of user space  
The logical data block address number is consecutively assigned to all of the data blocks in the  
user space starting with 0 to the first data block.  
The IDD treats sector 0, track 0, cylinder 0 as the first logical data block. The data block is  
allocated in ascending order of addresses in the following sequence (refer to Figure 3.5):  
1) Logical data blocks are assigned in ascending order of sector number in the same track.  
2) Subsequent logical data blocks are assigned to sectors in every track except the last track in  
ascending order of track number in the same track (head). Within the same track, logical data  
blocks are assigned in the same way as step 1).  
3) Subsequent logical data blocks are assigned to sectors in every track except the last track in  
ascending order of track number in the same cell. Within the same track, logical data blocks  
are assigned in the same way as step 1).  
4) For the last track in the same cell, subsequent logical data blocks are assigned to sectors other  
than spare sectors in ascending order of sector number.  
5) After blocks have been assigned in the same cell according to steps 1) to 4), subsequent logical  
data blocks are assigned in ascending order of cell number in the same way as in steps 1) to 4).  
Logical data blocks are assigned starting from track 0 in the next cell until the last cylinder  
(immediately preceding the alternate cylinder n-1 shown in Figure 3.1) of the zone except  
alternate cylinders in cells in the user space.  
When the logical data block is allocated, some sectors (track skew and head skew) shown in Figure  
3.5 are provided to avoid waiting for one turn involving head and cylinder switching at the location  
where the track or the head is physically switched.  
See Subsection 3.3.2 for defective/alternate block treatment and the logical data block allocation  
method in case of defective sectors exist on the disk.  
(2)  
Alternate area  
Alternate areas in the user space (spare sectors in the cell and alternate cylinders) are not included  
in the above logical data block addresses. Access to sectors which are allocated as an alternate  
block in the alternate area is made automatically by means of IDD sector slip treatment or alternate  
block treatment (explained in Subsection 3.3.2), so the user does not have to worry about accessing  
the alternate area. The user cannot access with specifying the data block on the alternate area  
explicitly.  
3-10  
C141-E166  
3.3  
Defect Management  
Defect list  
3.3.1  
Information of the defect location on the disk is managed by the defect list. The following are  
defect lists which the IDD manages.  
P list (Primary defect list): This list consists of defect location information available at the  
disk drive shipment and is recorded in a system space. The defects in this list are permanent,  
so the INIT must execute the alternate block allocation using this list when initializing the disk.  
D list (Data defect list): This list consists of defect location information specified in a  
FORMAT UNIT command by the INIT at the initialization of the disk. This information is  
recorded in the system space of the disk drive as the G list. To execute the alternate block  
allocation, the FORMAT UNIT command must be specified.  
G list (Growth defect list): This list consists of defective logical data block location  
information specified in a REASSIGN BLOCKS command by the INIT, information on  
defective logical data blocks assigned alternate blocks by means of IDD automatic alternate  
block allocation, information specified as the D list, and information generated as the C list.  
They are recorded in the system space on the disk drive.  
The INIT can read out the contents of the P and G lists by the READ DEFECT DATA command.  
3.3.2  
Alternate block allocation  
The alternate data block is allocated to a defective data block (= sectors) in defective sector units  
by means of the defect management method inside the IDD.  
The INIT can access all logical data blocks in the user space, as long as there is no error.  
Spare sectors to which alternate blocks are allocated can be provided in either "spare sectors in a  
cell" or "alternate cylinders". See Subsection 3.1.2 for details.  
The INIT can specify the size and area for spare sectors by the MODE SELECT command at the  
time of the initialization of the disk.  
Both of the following are applicable to the alternate block allocation.  
Sector slip treatment: Defective sectors are skipped and the logical data block corresponding  
to those sectors is allocated to the next physical sectors. This treatment is made on the same  
cell as the defective sector's and is effective until all spare sectors in that cell are used up.  
Alternate sector treatment: The logical data block corresponding to defective sectors is  
allocated to unused spare sectors in the same cell or unused spare sectors in the alternate  
cylinder.  
C141-E166  
3-11  
The alternate block allocation is executed by the FORMAT UNIT command, the REASSIGN  
BLOCKS command, or the automatic alternate block allocation. Refer to OEM Manual–SCSI  
Logical Specifications–for details of specifications on these commands. The logical data block is  
allocated to the next physically continued sectors after the above sector slip treatment is made. On  
the other hand, the logical data block is allocated to spare sectors which are not physically  
consecutive to the adjacent logical data blocks. If a command which processes several logical data  
blocks is specified, the IDD processes those blocks in ascending order of logical data block.  
(1)  
Alternate block allocation during FORMAT UNIT command execution  
When the FORMAT UNIT command is specified, the allocation of the alternate block to those  
defective sectors included in the specified lists (P, G, or D) is continued until all spare sectors in  
the same cell are used up. When they are used up, unused spare sectors in the alternate cylinder  
are allocated to the subsequent sectors in the cylinder by means of alternate sector treatment.  
Figure 3.7 is examples of the alternate block allocation during the FORMAT UNIT command  
execution.  
3-12  
C141-E166  
: n represents a logical data block number  
: Defective sector  
: Unused spare sector  
Figure 3.7 Alternate block allocation by FORMAT UNIT command  
If the data block verifying operation (certification) is not permitted (DCRT flag = 0) in the  
FORMAT UNIT command, the IDD checks all initialized logical data blocks by reading them out  
after the above alternate block allocation is made to initialize (format) the disk. If a defective data  
block is detected during the check, the IDD allocates the alternate block to the defective data  
block. This alternate block allocation is made by means of alternate sector treatment only like  
processing by the REASSIGN BLOCKS command even if unused spare sectors exists in the same  
cell.  
C141-E166  
3-13  
(2)  
Alternate block allocation by REASSIGN BLOCKS command  
When the REASSIGN BLOCKS command is specified, the alternate block is allocated to the  
defective logical data block specified by the initiator by means of alternate sector treatment. If  
there are unused spare sectors in the same cell as the specified defective logical data block, the  
alternate block is allocated to these unused spare sectors. However, the alternate block is allocated  
to unused spare sectors in the alternate cylinder when all spare sectors in the cell are used up.  
Figure 3.8 is examples of the alternate block allocation by the REASSIGN BLOCKS command.  
Alternate sectors  
The same cell  
: n represents a logical data block number  
: Defective sector  
: Unused spare sector  
Figure 3.8 Alternate block allocation by REASSIGN BLOCKS command  
(3)  
Automatic alternate block allocation  
Automatic alternate block allocation at read operation  
If the ARRE flag in the MODE SELECT parameter permits the automatic alternate block  
allocation, the IDD automatically executes the alternate block allocation and data duplication on  
the defective data block detected during the READ or READ EXTENDED command. This  
allocation method is the same as with the REASSIGN BLOCKS command (alternate sector  
treatment).  
3-14  
C141-E166  
Automatic alternate block allocation at write operation  
If AWRE flag in the MODE SELECT parameter permits the automatic alternate block allocation,  
the IDD executes the automatic alternate processing during WRITE command processing as  
described below:  
1) Commands to be applied  
-
-
-
WRITE  
WRITE EXTEND  
WRITE at executing WRITE AND VERIFY  
2) Application requirements  
When any of the above commands is issued to LBA registered in the uncorrectable error log of  
the READ command (LBA log of uncorrectable error while the READ command is executed),  
the AWRE processing is applied.  
3) AWRE processing  
The following processings are performed when the LBA matches the one in the uncorrectable  
error log:  
a) Primary media check  
-
Creates an uncorrectable error pattern (invalid LBA pattern) in the position of the  
error LBA, repeats the primary media check up to three times. If the error still occurs  
after the check repeated three times, it is judged to be defective. Then, it performs the  
alternate processing.  
b) Alternate processing  
-
Alternate media check  
Writes the data that causes an unrecoverable error into the alternate block, and  
performs the media check.  
(If the alternate block is a defective sector, the block is registered to the G list, another  
alternate block is allocated.)  
c) SA and defect map update processing (on alternate side)  
When an error occurs in the alternate processing, this WRITE command terminates with error.  
When the alternate processing normally terminates, the WRITE command is executed.  
Depending on the alternate processing result, one of the following sense codes is returned:  
Alternate processing is succeeded: 01-OC-01  
Alternate medium is defective:  
Fatal error (SA write retry out):  
03-OC-01  
03-OC-02  
C141-E166  
3-15  
IMPORTANT  
Automatic alternate block allocation is made only once during the  
execution of one command. If second defective block is detected, the  
alternate block assignment processing for the first defective block is  
executed but the alternate block assignment processing for the  
second one is not executed and the command being executed  
terminates. However, the initiator can recover the twice error by  
issuing the same command again.  
When an error is detected in a data block in the data area, recovery  
data is rewritten and verified in automatic alternate block allocation  
during the execution of the READ or READ EXTENDED command.  
Alternate block allocation will not be made for the data block if  
recovery is successful.  
Example: Even if the data error which is recoverable by the WRITE  
LONG command is simulated, automatic alternate block  
allocation will not be made for the data block.  
3-16  
C141-E166  
CHAPTER 4  
INSTALLATION REQUIREMENTS  
4.1  
4.2  
4.3  
Mounting Requirements  
Power Supply Requirements  
Connection Requirements  
This chapter describes the environmental, mounting, power supply, and connection requirements.  
4.1  
Mounting Requirements  
External dimensions  
4.1.1  
Figures 4.1 and 4.2 show the external dimensions of the IDD and the locations of the holes for the  
IDD mounting screws.  
Dimensions are in mm.  
Note:  
Mounting screw: #6-32UNC  
C141-E166  
4-1  
The value marked with (*) indicates the dimension between mounting holes on the bottom  
face.  
Figure 4.1 NC external dimensions  
4-2  
C141-E166  
The value marked with (*) indicates the dimension between mounting holes on the bottom  
face.  
Figure 4.2 NP external dimensions  
C141-E166  
4-3  
4.1.2  
Mounting  
The permissible orientations of the IDD are shown in Figure 4.3, and the tolerance of the angle is  
±5° from the horizontal plane.  
(c) Vertical –1  
(a) Horizontal –1  
(b) Horizontal –2  
(d) Vertical –2  
(e) Upright mounting –1  
(f) Upright mounting –2  
Direction of  
gravity  
Figure 4.3 IDD orientations  
4.1.3  
Notes on mounting  
(1)  
Mounting frame structure  
Special attention must be given to mount the IDD disk enclosure (DE) as follows.  
a) Use the frame with an embossed structure, or the like. Mount the IDD with making a gap  
of 2.5 mm or more between the IDD and the frame of the system.  
b) As shown in Figure 4.4, the inward projection of the screw from the IDD frame wall at the  
corner must be 5.0 mm or less.  
c) Tightening torque of screw must be secured with 0.59N·m (6kgf·cm) 12%.  
d) Impact caused by the electric driver must be within the device specifications.  
e) Must be handled on an anti-static mat.  
4-4  
C141-E166  
5.0 or less  
5.0 or less  
Figure 4.4 Mounting frame structure  
(2)  
Limitation of side-mounting  
Mount the IDD using the 4 screw holes at the both ends on the both sides as shown in Figure 4.5.  
Do not use the center hole by itself.  
In case of using the center hole, it must be used in combination with 2 holes on both ends.  
(Total 6 screws for 6 holes enclosed)  
4
Holes for  
mounting screw.  
2
3
Do not use these holes  
Holes for mounting screw.  
1
Use four holes (No.1-4) to mount.  
Figure 4.5 Limitation of side-mounting  
(3)  
Limitation of bottom-mounting  
Use all 4 mounting holes on the bottom face.  
C141-E166  
4-5  
(4)  
Environmental temperature  
Temperature condition at installed in a cabinet is indicated with ambient temperature measured  
30 mm from the disk drive. At designing the system cabinet, consider following points.  
Make a suitable air flow so that the DE surface temperature does not exceed 60°C.  
Cool the PCA side especially with air circulation inside the cabinet. Confirm the cooling effect  
by measuring temperature of specific ICs and the DE. These measurement results should be  
within a criteria listed in Table 4.1.  
Table 4.1  
Surface temperature check point  
No.  
1
Measurement point  
Criteria  
60°C  
88°C  
92°C  
91°C  
91°C  
Center of DE cover  
Read channel LSI  
VCM/SPM Driver  
HDC  
2
3
4
5
MPU  
3
1
4
2
5
Figure 4.6 Surface temperature measurement points  
(5)  
Service clearance area  
The service clearance area, or the sides which must allow access to the IDD for installation or  
maintenance, is shown in Figure 4.7.  
4-6  
C141-E166  
[Surface P’]  
• Setting terminal (on NP model only)  
• External operator panel connector  
[Surface R]  
• Hole for mounting screw  
[Surface P]  
• Cable connection  
[Surface Q]  
• Hole for mounting screw  
Figure 4.7 Service clearance area  
(6)  
(7)  
External magnetic field  
The drive should not be installed near the ferromagnetic body like a speaker to avoid the influence  
of the external magnetic field.  
Leak magnetic flux  
The IDD uses a high performance magnet to achieve a high speed seek. Therefore, a leak  
magnetic flux at surface of the IDD is large. Mount the IDD so that the leak magnetic flux does  
not affect to near equipment.  
(8)  
Others  
Seals on the DE prevent the DE inside from the particle. Do not damage or peel off labels.  
C141-E166  
4-7  
4.2  
Power Supply Requirements  
(1)  
Allowable input voltage and current  
The power supply input voltage measured at the power supply connector pin of the IDD (receiving  
end) must satisfy the requirement given in Subsection 2.1.3. (For other requirements, see Items (4)  
and (5) below.)  
(2)  
Current waveform (reference)  
Figure 4.8 shows the spin-up current waveform of +12 VDC.  
MAP3147NC/NP  
MAP3735NC/NP  
MAP3367NC/NP  
Time(2 sec/div)  
Time(2 sec/div)  
Time(2 sec/div)  
Figure 4.8 Spin-up current waveform (+12 VDC)  
(3)  
Power on/off sequence  
a) The order of the power on/off sequence of +5 VDC and +12 VDC, supplied to the IDD, does  
not matter.  
b) In a system which uses the terminating resistor power supply signal (TERMPWR) on the SCSI  
bus, the requirements for +5 VDC given in Figure 4.9 must be satisfied between the IDD and  
at least one of the SCSI devices supplying power to that signal.  
Figure 4.9 Power on/off sequence (1)  
4-8  
C141-E166  
c) In a system which does not use the terminating resistor power supply signal (TERMPWR) on  
the SCSI bus, the requirements for +5 VDC given in Figure 4.10 must be satisfied between the  
IDD and the SCSI device with the terminating resistor circuit.  
SCSI devices with  
the terminating  
resistor  
Figure 4.10 Power on/off sequence (2)  
d) Between the IDD and other SCSI devices on the SCSI bus, the +5 VDC power on/off sequence  
is as follows:  
In a system with its all SCSI devices designed to prevent noise from leaking to the SCSI  
bus when power is turned on or off, the power sequence does not matter if the  
requirement in b) or c) is satisfied.  
In a system containing an SCSI device which is not designed to prevent noise from  
leaking to the SCSI bus, the requirement given in Figure 4.11 must be satisfied between  
that SCSI device and the IDD.  
SCSI devices  
without noise  
leaking designed  
Figure 4.11 Power on/off sequence (3)  
C141-E166  
4-9  
(4)  
Sequential starting of spindle motors  
After power is turned on to the IDD, a large amount of current flows in the +12 VDC line when the  
spindle motor rotation starts. Therefore, if more than one IDD is used, the spindle motors should  
be started by the following procedures to prevent overload of the power supply unit. Regarding  
how to set a spindle motor start control mode, see Subsection 5.3.2.  
For the NP model drives, the spindle motors should be started sequentially using of the following  
procedures.  
a) Issue START/STOP commands at more than 12-second intervals to start the spindle motors.  
For details of this command specification, refer to SCSI Logical Interface Specifications.  
b) Turn on the +12 VDC power in the power supply unit at more than 12-second intervals to start  
the spindle motors sequentially.  
For the NC model drives, the spindle motors should be started after a delay of 12 seconds times  
[SCSI ID] by setting CN1-38 pin to open and CN1-78 pin to short.  
SCSI ID  
Delay time of spindle motor starting  
0
1
2
0
12 s  
24 s  
.
.
.
.
.
.
15  
180 s  
(5)  
Power supply to SCSI terminating resistor  
If power for the terminating resistor is supplied from the IDD to other SCSI devices through the  
SCSI bus, the current-carrying capacity of the +5 VDC power supply line to the IDD must be  
designed with considering of an increase of up to 200 mA.  
A method of power supply to the terminating resistor is selected with a setting terminal on the IDD  
(NP model only). See Subsection 5.3.2 for this selection.  
For the electrical condition of supplying power to the terminating resistor, refer to Subsection 1.4.2  
in SCSI Physical Interface Specifications.  
(6)  
Noise filter  
To eliminate AC line noise, a noise filter should be installed at the AC input terminal on the IDD  
power supply unit. The specification of this noise filter is as follows:  
Attenuation: 40 dB or more at 10 MHz  
Circuit construction: T-configuration as shown in Figure 4.12 is recommended.  
4-10  
C141-E166  
Figure 4.12 AC noise filter (recommended)  
4.3  
Connection Requirements  
4.3.1  
(1)  
SCA2 connector type 16-bit SCSI model (NC model)  
Connectors  
Figure 4.13 shows the locations of connectors on the SCA2 connector type 16-bit SCSI model (NC  
model).  
SCSI connector (CN1)  
(including power supply)  
Figure 4.13 NC connectors location  
C141-E166  
4-11  
(2)  
SCSI connector and power supply connector  
The connector for the SCSI bus is an unshielded SCA-2 connector conforming to SCSI-3 type  
which has two 40-pin rows spaced 1.27 mm (0.05 inch) apart. The power connector is included in  
the SCSI connector.  
Figure 4.14 shows the SCSI connector. See Section B.1 in Appendix B for signal assignments on  
the connector.  
For details on the physical/electrical requirements of the interface signals, refer to Sections 1.3 and  
1.4 in SCSI Physical Interface Specifications.  
Figure 4.14 SCA2 type 16-bit SCSI connector  
(3)  
Connector for external operator panel  
This connector is not available for NC model drives.  
4-12  
C141-E166  
4.3.2  
68 pin connector type 16-bit SCSI model (NP model)  
(1)  
Connectors  
Figures 4.15 show the locations of connectors and terminals on the 68 pin connector type 16-bit  
SCSI model (NP model).  
Power supply connector  
SCSI connector  
External operator panel connector  
External operator panel  
connector (CN2)  
Power supply  
connector  
(CN1)  
External operator  
SCSI connector  
(CN1)  
panel connector  
(CN1)  
Figure 4.15 NP connectors and terminals location  
(2)  
SCSI connector and power supply connector  
a. 16-bit SCSI  
The connector for the SCSI bus is an unshielded P connector conforming to SCSI-3 type which  
has two 34-pin rows spaced 1.27 mm (0.05 inch) apart. Figure 4.16 shows the SCSI  
connector. See Section B.2 in Appendix B for the signal assignments on the SCSI connector.  
For details on the physical/electrical requirements of the interface signals, refer to Sections 1.3  
and 1.4 in the SCSI Physical Interface Specifications.  
C141-E166  
4-13  
2.00mm  
Pin A1  
Pin 34  
Pin 1  
Pin 1  
Pin A2  
2.54mm  
1.27mm  
2.00m  
Pin 35  
5.08mm  
Pin 68  
0.40mm  
0.40mm  
1.00mm  
1.30mm  
0.635mm  
5.08mm  
Figure 4.16 68 pin type 16-bit SCSI interface connector  
b. Power supply connector  
Figure 4.17 shows the shape and the terminal arrangement of the output connector of DC  
power supply.  
Figure 4.17 Power supply connector (68 pin type 16-bit SCSI)  
(3)  
SG terminal  
The IDD is not provided with an SG terminal (fasten tab) for DC grounding. Therefore, when  
connecting SG and FG in the system, use the +5 VDC RETURN (ground) inside the power supply  
connector as the SG on the power supply side.  
(4)  
Connector for external operator panel  
Connector for 16-bit SCSI external operator panel  
CN1 provides connector for the external operator panel other than the SCSI bus as shown in  
Figure 4.18. Also, a connector for the external operator panel are provided on the IDD as  
shown in Figure 4.19. This allows connection of an external LED on the front panel, and an  
SCSI ID setting switch. For the recommended circuit of the external operator panel, see  
Subsection 4.3.4.  
4-14  
C141-E166  
Pin  
A1  
Signal  
–ID0  
A2  
Fault LED  
–ID1  
A3  
A4  
ESID  
A5  
–ID2  
A6  
(Reserved)  
–ID3  
A7  
A8  
–LED  
OPEN  
GND  
A9  
A10  
A11  
A12  
+5 V  
–WTP  
Figure 4.18 External operator panel connector (CN1)  
2.0mm  
Pin 2  
Pin 24  
Pin 1  
2.0mm  
Pin 23  
Figure 4.19 External operator panel connector (CN2)  
C141-E166  
4-15  
(5)  
External operator panel connector Signals  
a. 16-bit SCSI –ID3, –ID2, –ID1, –ID0: Input signals (CN1-A1, A3, A5, A7 pin and CN2-02,  
04, 06, 08 pin)  
These signals are used for providing switches to set the SCSI ID of the IDD externally. Figure  
4.20 shows the electrical requirements. For the recommended circuit examples, see Subsection  
4.3.4.  
Figure 4.20 16-bit SCSI ID external input  
4-16  
C141-E166  
b. Fault LED: Output signal (CN1-A2 pin)  
The IDD indicates that the write-protect status is in effect (CN1-A12 is connected to the GND, or the  
CN2-9 and CN2-10 are short-circuited.) A signal for driving the LED is output.  
(IDD)  
74LS06 or equivalent  
150  
CN1-A2  
IMPORTANT  
This signal is temporarily driven at the GND level when the micro  
program reads the SCSI ID immediately after the power supply to  
the IDD has been switched on (it is possible to set up the SCSI ID by  
short circuiting CN1-A1 and CN1-A2.)  
c. CN1-A6 (reserved)  
This pin is temporarily driven at the GND level when the micro program reads the SCSI ID  
immediately after the power supply to the IDD has been switched on (it is possible to set up the SCSI  
ID by short circuiting CN1-A3 and CN1-A4, and CN1-A5 and CN1-A6.)  
This pin gets high impedance status except above.  
d. –LED and LED (+5V): Output signals (CN1-A8 pin and CN2-21, 22 pin)  
These signals drive the external LED as same as LED on the front of the disk drive. The  
electrical requirements are given in Figure 4.21.  
IMPORTANT  
1. The external LED is identical in indication to the LED on the front of the  
IDD.  
2. Any load other than the external LED (see Subsection 4.3.5) should not  
be connected to the CN2-21, 22 pin (LED [V] and –LED terminals).  
3. This signal is temporarily driven at the GND level when the micro  
program reads the SCSI ID immediately after the power supply to the  
IDD has been switched on (it is possible to set up the SCSI ID by short  
circuiting CN1-A7 and CN1-A8.)  
C141-E166  
4-17  
Figure 4.21 Output signal for external LED  
e. –WTP: Input signal (CN1-A12 and CN2-9, 10 pin)  
By connecting the CN1-A12 and CN2-10 pins to the GND, writing operations into the IDD  
disc media are set to disable.  
4-18  
C141-E166  
(6)  
Cable connection requirements  
The requirements for cable connection between the IDD, host system, and power supply unit are  
given in Figure 4.22. Recommended components for connection are listed in Table 4.2.  
External operator panel  
(example)  
Figure 4.22 SCSI cables connection  
C141-E166  
4-19  
4.3.3  
Cable connector requirements  
Table 4.2 lists the recommended components cable connection.  
Table 4.2 Recommended components for connection  
Applicable  
model  
Par number  
(Size)  
Reference  
(*1)  
Name  
Manufacturer  
Tyco Electronics  
AMP  
787311-1  
87689-0001  
SCSI connector  
(CN1)  
NC  
Connector  
Molex  
Cable socket  
(closed-end type)  
DHJ-PAC68-2AN DDK  
UL20528-FRX-68-  
SCSI cable (CN1)  
S1  
S2  
Signal cable  
Fujikura  
P0.635  
Tyco Electronics  
AMP  
Cable socket housing 1-480424-0  
Power supply  
cable (CN1)  
Tyco Electronics  
AMP  
Contact  
Cable  
170148-1  
(AWG18 to 24)  
NP  
HIROSE  
ELECTRIC  
Cable socket housing A3B-12D-2C  
External operator  
panel (CN1)  
HIROSE  
ELECTRIC  
S3  
S4  
Contact  
Cable  
A3B-2630SCC  
(AWG26 to 36)  
FUJITSU  
TAKAMIZAWA  
Cable socket housing FCN-723J024/2M  
External operator  
panel (CN2)  
FUJITSU  
TAKAMIZAWA  
Contact  
Cable  
FCN-723J-G/AM  
(AWG28)  
(*1) See Figure 4.22.  
(1)  
(2)  
(3)  
SCSI cable  
See Section 1.3, “Physical Requirements”, and Section 1.4, “Electrical Requirements”, in SCSI  
Physical Interface Specifications.  
Power cable  
IDDs must be star-connected to the DC power supply (one to one connection) to reduce the  
influence of load variations.  
DC ground  
The DC ground cable must always be connected to the IDD because no fasten tab dedicated to SG  
is provided with the IDD. Therefore, when SG and FG are connected in the system, it is necessary  
to connect SG and FG at the power supply or to connect SG of the power supply to FG of the  
system.  
4-20  
C141-E166  
(4)  
External operator panel (NP model only)  
The external operator panel is installed only when required for the system. When connection is not  
required, leave open the following pins in the external operator panel connector of the IDD : Pins  
21, 22 and pins 01 through 08 in CN2 and pins A1 through A12 in CN1.  
4.3.4  
External operator panel (on NP model drives only)  
A recommended circuit of the external operator panel is shown in Figure 4.23. Since the external  
operator panel is not provided as an option, this panel must be fabricated at the user site referring  
to the recommendation if necessary.  
(IDD)  
S3  
A1  
-ID0  
-ID1  
-ID2  
-ID3  
ID0  
ID1  
C
N
1
A3  
A5  
A7  
ID2  
ID3  
A10  
GND  
S3  
A8  
-LED  
+5V  
(LED)  
A11  
R
Approx. 300Ω  
(*1)  
S4  
C
N
2
LED (+5V)  
-LED  
21  
22  
(LED)  
(for 16-bit SCSI)  
(*1) For connecting the external LED to CN2.  
Figure 4.23 External operator panel circuit example  
C141-E166  
4-21  
IMPORTANT  
Do not connect the external LED to both CN1 and CN2. Connect it  
to either of them.  
4-22  
C141-E166  
CHAPTER 5  
INSTALLATION  
5.1  
5.2  
5.3  
5.4  
5.5  
5.6  
Notes on Handling Drives  
Connections  
Setting Terminals  
Mounting Drives  
Connecting Cables  
Confirming Operations after Installation and Preparation  
for Use  
5.7  
5.8  
Dismounting Drives  
Spare Disk Drive  
This chapter describes the notes on handling drives, connections, setting switches and plugs, mounting  
drives, connecting cables, confirming drive operations after installation and preparation for use, and  
dismounting drives.  
5.1  
Notes on Handling Drives  
The items listed in the specifications in Table 2.1 must be strictly observed.  
(1)  
General notes  
a) Do not give the drive shocks or vibrations exceeding the value defined in the standard because  
it may cause critical damage to the drive. Especially be careful when unpacking.  
b) Do not leave the drive in a dirty or contaminated environment.  
c) Since static discharge may destroy the CMOS semiconductors in the drive, note the following  
after unpacking:  
Use an ESD strap and body grounding when handling the drive.  
Do not touch any components on the PCAs except setting terminal (CN1 and CN2).  
CAUTION  
Hot temperature  
To prevent injury, do not handle the drive until after the device has cooled  
sufficiently after turning off the power. The DE and LSI become hot during  
operation and remain hot immediately after turning off the power.  
C141-E166  
5-1  
(2)  
(3)  
(4)  
Unpackaging  
a) Use a flat work area. Check that the "This Side Up" sign side is up. Handle the package on  
soft material such as a rubber mat, not on hard material such as a wooden desk.  
b) Be careful not to give excess pressure to the internal unit when removing cushions.  
c) Be careful not to give excess pressure to the PCAs and interface connector when removing the  
drive from the antistatic bag.  
d) Do not remove the sealing label or cover of the DE and screws.  
Installation/removal/replacement  
a) Do not attempt to connect or disconnect connections when power is on. The only pin settings  
that may be altered are pins 9, 10 (Write Protect) in CN2. (NP model)  
b) Do not move the drive when power is turned on or until the drive completely stops (for 30  
seconds) after power is turned off.  
c) Place and keep removed screws and other parts where they will not get lost or damaged.  
d) Keep a record of all maintenance work for replacing.  
Packaging  
a) Store the drive in an antistatic bag.  
b) It is recommended to use the same cushions and packages as those at delivery. If those at  
delivery cannot be used, use a package with shock absorption so that the drive is free from  
direct shocks. In this case, fully protect the PCAs and interface connector so that they are not  
damaged.  
c) Indicate "This Side Up" and "Handle With Care" on the outside of the package so that it is not  
turned over.  
(5)  
Delivery  
a) When delivering the drive, provide packaging and do not turn it over.  
b) Minimize the delivery distance after unpacking and avoid shocks and vibrations with cushions.  
For the carrying direction at delivery, use one of the mount allowable directions in Subsection  
4.2.2 (vertical direction is recommended).  
(6)  
Storage  
a) Provide moistureproof packaging for storage.  
b) The storage environment must satisfy the requirements specified in Subsection 2.1.3 when the  
drive is not operating.  
c) To prevent condensation, avoid sudden changes in temperature.  
5-2  
C141-E166  
5.2  
Connections  
Figure 5.1 shows examples of connection modes between the host system and the IDD. For the 16-  
bit SCSI, up to 16 devices including the host adapter, IDD, and other SCSI devices can be  
connected to the SCSI bus in arbitrary combinations. Install a terminating resistor on the SCSI  
device connected to both ends of the SCSI cable.  
See Section 4.4 for the cable connection requirements and power cable connections.  
Connecting one IDD  
(1)  
C141-E166  
5-3  
(2)  
Connecting more than one IDD (single host)  
Figure 5.1 SCSI bus connections (1 of 2)  
(3)  
Connecting more than one IDD (multi-host)  
: SCSI terminator  
Figure 5.1 SCSI bus connections (2 of 2)  
5-4  
C141-E166  
5.3  
Setting Terminals  
A user sets up the following terminals and SCSI terminating resistor before installing the IDD in  
the system as required.  
Setting terminal: CN1 (NC model), CN2 (NP model)  
Figure 5.2 shows the location of setting terminal (NP model only. For NC model, see Figure 4.13  
because the setting terminal is included in SCSI connector CN1.). Figure 5.3 shows the allocation  
and default settings (NP model only. For allocation of NC model, see Table B.).  
CAUTION  
Data loss  
1. The user must not change the setting of terminals not described in this  
section. Do not change setting status set at factory shipment.  
2. Do not change the setting of terminals except following setting pins  
during the power is turned on.  
Write protect: CN2 9-10 (NP model only)  
3. To short the setting terminal, use the short plug attached when the device  
is shipped from the factory.  
Pin 2  
Pin 24  
CN2  
Pin 1  
Pin 23  
Figure 5.2 Setting terminals location (on NP models only)  
C141-E166  
5-5  
2
1
4
3
6
5
8
7
10 12 14 16 18 20 22 24  
9
11 13 15 17 19 21 23  
Terminator power supply: Supply  
(LED signal)  
(IDD Reset signal)  
N.C.  
Force Single Ended: LVD mode  
Force Narrow: 16-bit SCSI  
Motor start mode  
Write protect: enabled  
SCSI ID #15  
Figure 5.3 CN2 setting terminal (on NP models only)  
5.3.1  
SCSI ID setting  
Table 5.1 shows the SCSI ID setting. For the terminal location and allocation of NC model, see  
Figure 4.13 and Table B.1. For NP model, see Figure 5.2 and 5.3.  
IMPORTANT  
When the SCSI ID is set using the external operator panel connector  
CN1 of NP model, all pins listed in Table 5.1 should be open. If any  
of pins are shorted, unexpected SCSI ID is set.  
5-6  
C141-E166  
Table 5.1  
NC model (CN1)  
SCSI ID setting  
NP model (CN2)  
SCSI  
ID  
39  
79  
40  
80  
1-2  
3-4  
5-6  
7-8  
0
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Open  
Short  
Short  
Open  
Open  
Short  
Short  
Open  
Open  
Short  
Short  
Open  
Open  
Short  
Short  
Open  
Open  
Open  
Open  
Short  
Short  
Short  
Short  
Open  
Open  
Open  
Open  
Short  
Short  
Short  
Short  
Open  
Open  
Open  
Open  
Open  
Open  
Open  
Open  
Short  
Short  
Short  
Short  
Short  
Short  
Short  
Short  
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Short  
Open  
Open  
Short  
Short  
Open  
Open  
Short  
Short  
Open  
Open  
Short  
Short  
Open  
Open  
Short  
Short  
Open  
Open  
Open  
Open  
Short  
Short  
Short  
Short  
Open  
Open  
Open  
Open  
Short  
Short  
Short  
Short  
Open  
Open  
Open  
Open  
Open  
Open  
Open  
Open  
Short  
Short  
Short  
Short  
Short  
Short  
Short  
Short  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15 (*1)  
*1 Set at factory shipment.  
IMPORTANT  
1. To set the setting terminals on NC models to short, apply voltage ranging  
between -0.3 V and 0.8 V to the setting terminals externally. To set the  
setting terminals on NC models to open, apply voltage ranging between  
2.0 V and 5.5 V to the setting terminals from an external source.  
2. Set the SCSI ID so that there are no duplicates between SCSI devices on  
the same SCSI bus.  
3. The priority of SCSI bus use in ARBITRATION phase is determined by  
SCSI ID as follows:  
7 > 6 > 5 > 4 > 3 > 2 > 1 > 0 > 15 > 14 > 13 > 12 > 11 > 10 > 9 > 8  
C141-E166  
5-7  
5.3.2  
Each mode setting  
(1)  
Setting terminator power supply  
Refer to Table 5.2 for controlling the supply of power from the drive to the SCSI terminator power  
source (TERMPOW).  
For information on NP model, refer to Figures 5.2 and 5.3.  
Table 5.2  
Setting SCSI terminator power supply (NP model)  
Supply on/off of SCSI terminator power from  
IDD  
CN2 23-24  
Supply off  
Supply on  
Open  
Short (*1)  
*1. Set at factory shipment.  
For NC model, the function of the terminator power supply setting is not supported.  
Motor start mode  
(2)  
Set how to control the starting of the IDD spindle motor according to Table 5.3. This setting only  
determines the operation mode when the power supply is turned on or the microcode is  
downloaded. In both modes, stopping or restarting the spindle motor can be controlled by  
specifying the START/STOP UNIT command.  
Table 5.3  
Motor start mode setting  
NC model (*3)  
NP model  
Start timing of the spindle motor  
CN1 38  
Short  
CN1 78  
CN2 11-12  
Starting of the motor is controlled with the  
START/STOP UNIT command.  
Open or Short  
Open  
The motor is started immediately after the  
power supply is turned on or after the  
microcode is downloaded.  
Open  
Open  
Open  
Short  
Short (*1)  
The motor is started after the elapse of a delay  
time that is based on the SCSI ID. The delay  
time is provided immediately after the power  
supply is turned on or after the microprogram is  
downloaded.  
(*2)  
*1. Set at factory shipment.  
*2. For NP model, delay starting of spindle motor is supported by the CHANGE DEFINITION  
command only.  
*3. To set the setting terminals on NC models to short, apply voltage ranging between-0.3 V and  
0.8 V to the setting terminals externally. To set the setting terminals on NC models to open,  
apply voltage ranging between 2.0 V and 5.5 V to the setting terminals from an external source.  
Refer to Chapter 3 of the SCSI Logical Interface Specifications for details of the START/STOP  
UNIT command.  
5-8  
C141-E166  
(3)  
Write protect  
When the write protect function is enabled on NP model, writing to the disk medium is disabled.  
Table 5.4  
Write protect setting (NP model)  
CN2 9-10  
Write protect  
Write operation is enabled.  
Open (*1)  
Short  
Write operation is disable.  
*1. Set at factory shipment.  
For NC model, the function of the write protect setting is not supported.  
Setting of the SCSI interface operation mode  
(4)  
By establishing a short-circuit between CN2-15 amd CN2-16 on NP model, the SCSI interface  
operation mode is forcibly set to the single-ended mode. When this setup terminal is open, the IDD  
automatically identifies the DIFFSNS signal level on the SCSI bus and the IDD SCSI interface  
operation mode is set to the operation mode.  
Table 5.5  
Setting of the SCSI interface operation mode (NP model)  
Operation mode  
CN2 15-16  
Open (*1)  
Short  
Follows the DIFFSNS signal level on the SCSI bus  
Single-Ended mode  
*1. Set at factory shipment.  
For NC model, the function of the SCSI interface operation mode is not supported, so the SCSI  
interface operation mode follows the level of the DIFFSNS signal on the SCSI bus.  
(5)  
Setting the bus width of the SCSI interface  
By establishing a short-circuit between CN2-13 and CN2-14 on NP model, the bus width for the  
SCSI interface is forcibly set to the 8-bit bus mode. This setup terminal must be set in order to  
guarantee the physical level of the SCSI interface’s upper bus (DB8-15, P1) inside the IDD only  
when the top-level bus (DB8-15, P1) for the IDD SCSI interface is not connected to the external  
part of the IDD.  
Table 5.6  
Setting the bus width of the SCSI interface (NP model)  
Bus width  
16 bit bus  
8 bit bus  
CN2 13-14  
Open (*1)  
Short  
*1. Set at factory shipment.  
For NC model, the function of the bus width setting for the SCSI interface is not supported.  
C141-E166  
5-9  
5.3.3  
Mode settings  
In addition to the previously described settings using setting terminals, the IDD is provided with several  
mode settings. The mode settings are enabled by specifying the CHANGE DEFINITION command.  
Table 5.7 lists the mode settings and their settings at factory shipment.  
Refer to Section 3.1.4 of the SCSI Logical Interface Specifications for details of the command.  
Table 5.7  
Default mode settings (by CHANGE DEFINITION command)  
Mode setting  
Contents  
SCSI-2  
SCSI level  
SYNCHRONOUS DATA TRANSFER REQUEST message  
sending  
Not sent from IDD  
UNIT ATTENTION report mode  
Reselection retry count  
Reported  
Not restricted  
Not sent from IDD  
250 ms  
WIDE DATA TRANSFER REQUEST message sending  
Reselection time-out delay  
0 sec (NP)  
12 sec × SCSI ID (NC)  
Spindle motor start delay time  
5-10  
C141-E166  
5.4  
Mounting Drives  
5.4.1  
Check before mounting  
Reconfirm if the setting terminals are set correctly according to Table 5.8 before mounting the NP  
model drives in the system cabinet. For setting terminals location, see Section 5.3.  
The NC model drives do not require the following check.  
Table 5.8  
Setting check list (NP model only)  
Setting  
terminal  
CN2  
Setting contents  
(Check item)  
Setting  
position  
No.  
1
Check  
Remarks  
SCSI ID  
CN2  
1 - 2  
3 - 4  
5 - 6  
7 - 8  
¤ (SCSI ID = __) Upper bus  
(DB 8 to 15 PI)  
not connected  
2
3
4
5
Write protect  
CN2 9 - 10  
CN2 11 - 12  
¤ Short ¤ Open  
Motor start mode  
Force Narrow  
¤ Short ¤ Open  
CN2 13 - 14 ¤ Short ¤ Open  
Force single ended  
CN2 15 - 16 ¤ Short ¤ Open  
Terminator power  
supply  
6
CN2 23 - 24  
¤ Short ¤ Open  
5.4.2  
Mounting procedures  
Since mounting the drive depends on the system cabinet structure, determine the work procedures  
considering the requirements specific to each system. The general mounting method and items to  
be checked are shown below.  
See Subsection 4.1 for the details of requirements for installing the IDD.  
1) With a system to which an external operator panel is mounted, if it is difficult to access the  
connector after the drive is mounted on the system cabinet, connect the external operator panel  
cable before mounting the drive.  
2) Fix the drive in the system cabinet with four mounting screws as follows:  
The drive has 10 mounting holes (both sides: 3 × 2, bottom: 4). Fix the drive by using  
four mounting holes of both sides or the bottom. (See Figure 4.5)  
Use mounting screws whose lengths inside the drive mounting frame are 5.0 mm or less  
when the screws are tightened (see Figure 4.4).  
When mounting the drive, be careful not to damage parts on the PCAs.  
3) Check to ensure that the DE is not touching the frame on the system side after tightening the  
screws. At least 2.5mm of clearance is required between the DE and the frame. (Indicated in  
Figure 4.4)  
4) When an electric driver is in use, less than device specifications must be used.  
C141-E166  
5-11  
5.5  
Connecting Cables  
Connect the IDD and system with the following cables. See Section 4.3 for further details of the  
requirements for IDD connector positions and connecting cables.  
Power cable  
SCSI cable  
External operator panel cable (if required for NP model)  
The general procedures and notes on connecting cables are described below. Especially, pay  
attention to the inserting orientation of each cable connector.  
CAUTION  
Damage  
1. Make sure that system power is off before connecting or disconnecting  
cables.  
2. Do not connect or disconnect cables when power is on. (except NC  
model)  
a) Connect power cable.  
b) Connect the external operator panel (if required for NP model).  
c) Connect the SCSI cable.  
d) Fix the cables so that they do not touch the DE and PCAs, or so that the smooth flow of the  
cooling air in the system cabinet is assured.  
CAUTION  
Damage  
1. Be careful of the insertion orientations of the SCSI connectors. With the  
system in which terminating resistor power is supplied via the SCSI  
cable, if the power is turned on, the overcurrent protection fuse of the  
terminating resistor power supplier may be blown or the cable may be  
burnt if overcurrent protection is not provided.  
When the recommended parts listed in Table 4.2 are used, inserting the  
cables in the wrong orientation can be prevented.  
2. To connect SCSI devices, be careful of the connection position of the  
cable. Check that the SCSI device with the terminating resistor is the last  
device connected to the cable.  
5-12  
C141-E166  
5.6  
Confirming Operations after Installation and Preparation for use  
Confirming initial operations  
5.6.1  
This section describes the operation check procedures after power is turned on. Since the initial  
operation of the IDD depends on the setting of the motor start mode, check the initial operation by  
either of the following procedures.  
(1)  
Initial operation in the case of setting so that motor starts at powering-on  
a) When power is turned on, the LED blinks an instant and the IDD executes initial self-  
diagnosis.  
b) If an error is detected in the initial self-diagnosis, the LED blinks periodically.  
Remark:  
The spindle motor may or may not start rotating in this stage.  
c) When the IDD status is idle, the LED remains off (when the initiator accesses the IDD via the  
SCSI bus, the LED lights).  
(2)  
Initial operation in the case of setting so that motor starts with START/STOP command  
a) When power is turned on, the LED blinks an instant and the IDD executes initial self-  
diagnosis.  
b) If an error is detected in the initial self-diagnosis, the LED blinks.  
c) The spindle motor does not start rotating until the START/STOP UNIT command for the start  
is issued. The INIT needs to issue the START/STOP UNIT command to start the spindle  
motor by the procedure in Subsection 5.6.2.  
d) The disk drive enters the READY status in 60 seconds after the START/STOP UNIT  
command is issued. At this time, the IDD reads "system information" from the system space  
on the disk.  
e) The LED blinks during command execution.  
(3)  
Check items at illegal operation  
a) Check that cables are mounted correctly.  
b) Check that power and voltages are supplied correctly (measure them with the IDD power  
connection position).  
c) Check the setting of each setting terminal. Note that the initial operation depends on the  
setting of the motor start mode and LED display requirements.  
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5-13  
d) If an error is detected in initial self-diagnosis the LED blinks. In this case, it is recommended  
to issue the REQUEST SENSE command from the initiator (host system) to obtain information  
(sense data) for error analysis.  
IMPORTANT  
The LED lights during the IDD is executing a command. However,  
in same commands, the lighting time is only an instant. Therefore, it  
seems that the LED blinks or the LED remains off.  
5.6.2  
Checking SCSI connection  
When the initial operation is checked normally after power is turned on, check that the IDD is  
connected to the SCSI bus from the host system. Although checking the connection depends on  
the structure of the host system, this section describes the general procedures.  
(1)  
Checking procedure  
Issuing the commands and determining the end status depends on the start mode of the spindle  
motor and UNIT ATTENTION report mode (specified with setting terminal). Figure 5.4 shows  
the recommended checking procedure for the mode that the motor starts when power is turned on.  
Figure 5.5 shows for the mode that the motor starts by the START/STOP command. In these  
recommended checking procedures, following items are checked.  
Note:  
Following steps a) to e) correspond to a) to e) in Figures 5.4 and 5.5.  
a) Issue the TEST UNIT READY command and check that the IDD is connected correctly  
to the SCSI bus and the initial operation after power is turned on ended normally. The  
command issue period of the TEST UNIT READY command shall be more than 20 ms.  
b) To control starting of the spindle motor from the host system, issue the START/STOP  
UNIT command to start the spindle motor.  
c) Check the SCSI bus operations with the WRITE BUFFER and READ BUFFER  
commands. Use data whose data bus bits change to 0 or 1 at least once. (Example: Data  
with an increment pattern of X'00' to X'FF')  
d) Start the IDD self-diagnostic test with the SEND DIAGNOSTIC command and check the  
basic operations of the controller and disk drive.  
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Motor starts when power is turned on  
Self test = 1  
Unit Of =1  
No parameter  
(60  
Figure 5.4 Checking the SCSI connection (A)  
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Motor starts by START/STOP command  
* Executing time: about 60 seconds  
Figure 5.5 Checking the SCSI connection (B)  
5-16  
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(2)  
Checking at abnormal end  
a) When sense data can be obtained with the REQUEST SENSE command, analyze the sense  
data and retry recovery for a recoverable error. Refer to Chapter 5 of SCSI Logical Interface  
Specifications for further details.  
b) Check the following items for the SCSI cable connection:  
All connectors including other SCSI devices are connected correctly.  
The terminating resistor is mounted on both ends of the cable.  
Power is connected to the terminating resistor.  
c) Check the setting of the terminals. Note that the checking procedure of SCSI connection  
differs depending on the setting of the motor start mode and UNIT ATTENTION report mode.  
5.6.3  
Formatting  
Since the disk drive is formatted with a specific (default) data format for each model (part number)  
when shipped from the factory, the disk need not be formatted (initialized) when it is installed in  
the system.  
However, when the system needs data attributes different from the default format, all recording  
surface of the disk must be formatted (initialized) according to the procedures below.  
The user can change the following data attributes at initialization:  
Logical data block length  
Number of logical data blocks or number of cylinders in the user space  
Alternate spare area size  
This section outlines the formatting at installation. Refer to Chapters 3 and 6 of SCSI Logical  
Interface Specifications for further details.  
(1)  
MODE SELECT/MODE SELECT EXTENDED command  
Specify the format attributes on the disk with the MODE SELECT or MODE SELECT  
EXTENDED command. The parameters are as follows.  
a. Block descriptor  
Specify the size (byte length) of the logical data block in the "data block length" field. To  
explicitly specify the number of logical data blocks, specify the number in the "number of data  
blocks" field. Otherwise, specify 0 in "number of data blocks" field. In this case, the number  
of logical data blocks after initialization is determined by the value specified in the format  
parameter (page code = 3) and drive parameter (page code = 4).  
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b. Format parameter (page code = 3)  
Specify the number of spare sectors for each cell in the "alternate sectors/zone" field and  
specify the number of tracks for alternate cylinders (= number of alternate cylinders × number  
of disk drive heads) in the "alternate tracks/zone" field. It is recommended not to specify  
values smaller than the IDD default value in this field.  
(2)  
FORMAT UNIT command  
Initialize all recording surface of the disk with the FORMAT UNIT command. The FORMAT  
UNIT command initializes all surface of the disk using the P lists, verifies data blocks after  
initialization, and allocates an alternate block for a defect block detected with verification. With  
initialization, the value "00" is written into all bytes of all logical data blocks. Only the position  
information of defect blocks detected with verification is registered in the G list. The  
specifications are as follows:  
a. Specifying CDB  
Specify 0 for the "FmtData" bit and the "CmpLst" bit on CDB, 000 for the "Defect List  
Format" field, and data pattern written into the data block at initialization for the "initializing  
data pattern" field.  
b. Format parameter  
When the values in step a. are specified with CDB, the format parameter is not needed.  
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5.6.4  
Setting parameters  
The user can specify the optimal operation mode for the user system environments by setting the  
following parameters with the MODE SELECT or MODE SELECT EXTENDED command:  
Error recovery parameter  
Disconnection/reconnection parameter  
Caching parameter  
Control mode parameter  
With the MODE SELECT or MODE SELECT EXTENDED command, specify 1 for the "SP" bit  
on CDB to save the specified parameter value on the disk. This enables the IDD to operate by  
using the parameter value set by the user when power is turned on again. When the system has  
more than one INIT, different parameter value can be set for each INIT.  
When the parameters are not set or saved with the MODE SELECT or MODE SELECT  
EXTENDED command, the IDD sets the default values for parameters and operates when power is  
turned on or after reset. Although the IDD operations are assured with the default values, the  
operations are not always optimal for the system. To obtain the best performance, set the  
parameters in consideration of the system requirements specific to the user.  
This section outlines the parameter setting procedures. Refer to Chapter 3 of SCSI Logical  
Interface Specifications for further details of the MODE SELECT and MODE SELECT  
EXTENDED commands and specifying the parameters.  
IMPORTANT  
1. At factory shipment of the IDD, the saving operation for the MODE  
SELECT parameter is not executed. So, if the user does not set  
parameters, the IDD operates according to the default value of each  
parameter  
2. The model select parameter is not saved for each SCSI ID of but as the  
common parameter for all IDs. In the multi-INIT System, parameter  
setting cannot be changed for each INIT.  
3. Once parameters are saved, the saved value is effective as long as next  
saving operation is executed from the INIT. For example, even if the  
initialization of the disk is performed by the FORMAT UNIT command,  
the saved value of parameters described in this section is not affected.  
4. When the IDD, to which the saving operation has been executed on a  
system, is connected to another system, the user must pay attention to  
that the IDD operates according to the saved parameter value if the  
saving operation is not executed at installation.  
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5-19  
5. The saved value of the MODE SELECT parameter is assumed as the  
initial value of each parameter after the power-on, the RESET condition,  
or the BUS DEVICE RESET message. The INIT can change the  
parameter value temporary (actively) at any timing by issuing the MODE  
SELECT or MODE SELECT EXTENDED command with specifying "0"  
to the SP bit in the CDB.  
(1)  
Error recovery parameter  
The following parameters are used to control operations such as IDD internal error recovery:  
a. Read/write error recovery parameters (page code = 1)  
Parameter  
Default value  
1 (enabled)  
• AWRE:  
• ARRE:  
Automatic alternate block allocation at Write  
operation  
Automatic alternate block allocation at read  
operation  
1 (enabled)  
• TB:  
Uncorrectable data transfer to the INIT  
Immediate correction of correctable error  
Report of recovered error  
1 (enabled)  
1 (enabled)  
0 (disabled)  
0 (Correction is  
enabled.)  
• EER:  
• PER:  
• DCR:  
Suppression of ECC error correction  
• Retry count at read operation  
• Retry count at write operation  
• Recovery time limit  
63  
63  
30 sec  
b. Verify error recovery parameters (page code = 7)  
Parameter  
Default value  
• ERR:  
• PER:  
• DTE:  
Immediate correction of recoverable error  
Report of recovered error  
Stop of command processing at successful  
error recovery  
1 (enabled)  
0 (disabled)  
0 (Processing is  
continued.)  
• DCR:  
Suppression of ECC error correction  
0 (Correction is  
enabled.)  
• Retry count at verification  
63  
c. Additional error recovery parameters (page code = 21)  
Parameter  
Default value  
15  
• Retry count at seek error  
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Notes:  
1. The user can arbitrarily specify the following parameters according to the system  
requirements:  
ARRE  
AWRE  
TB  
PER  
2. The user also can arbitrarily specify parameters other than the above. However, it is  
recommended to use the default setting in normal operations.  
(2)  
Disconnection/reconnection parameters (page code = 2)  
The following parameters are used to optimize the start timing of reconnection processing to  
transfer data on the SCSI bus at a read (READ or READ EXTENDED command) or write  
operation (WRITE, WRITE EXTENDED, or WRITE AND VERIFY command) of the disk.  
Refer to Chapter 2 of SCSI Logical Interface Specifications for further details.  
Parameter  
Default value  
00 (HEX)  
• Buffer full ratio  
• Buffer empty ratio  
00 (HEX)  
Notes:  
1. In a system without the disconnection function, these parameters need not be specified.  
2. Determine the parameter values in consideration of the following performance factors of  
the system:  
Time required for reconnection processing  
Average data transfer rate of the SCSI bus  
Average amount of processing data specified with a command  
Refer to Chapter 2 of SCSI Logical Interface Specifications for how to obtain the rough  
calculation values for the parameter values to be set. It is recommended to evaluate the  
validity of the specified values by measuring performance in an operation status under the  
average system load requirements.  
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5-21  
(3)  
Caching parameters  
The following parameters are used to optimize IDD Read-Ahead caching operations under the  
system environments. Refer to Chapter 2 of SCSI Logical Interface Specifications for further  
details.  
Parameter  
Initiator control  
Default value  
• IC:  
0 (Drive-specific  
control (page  
cache))  
• RCD:  
• WCE:  
• MS:  
Disabling Read-Ahead caching operations  
Write Cache Enable  
0 (enabled)  
1 (enabled)  
Specifying the multipliers of "minimum  
0 (Specifying  
prefetch" and "maximum prefetch" parameters  
absolute value)  
• DISC:  
Prefetch operation after track switching during  
prefetching  
1 (enable)  
• Number of blocks for which prefetch is suppressed  
• Minimum prefetch  
X'FFFF'  
X'0000'  
• Maximum prefetch  
X' XXXX'  
(1 cache segment)  
• Number of blocks with maximum prefetch restrictions  
• Number of segments  
X'FFFF'  
X'08'  
Notes:  
1. When Read-Ahead caching operations are disabled by the caching parameter, these  
parameter settings have no meaning except write cache feature.  
2. Determine the parameters in consideration of how the system accesses the disk. When the  
access form is not determined uniquely because of the processing method, the parameters  
can be re-set actively.  
3. For sequential access, the effective access rate can be increased by enabling Read-Ahead  
caching operations and Write Cache feature.  
(4)  
Control mode parameters  
The following parameters are used to control the tagged queuing and error logging.  
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a. Control mode parameters  
Parameter  
• Queue algorithm modifier  
Default value  
0 (Execution  
sequence of  
read/write  
commands is  
optimized.)  
• QErr:  
Resume or abort remaining suspended  
commands after sense pending state  
0 (command is  
resumed)  
• DQue:  
Disabling tagged command queuing  
0 (enabled)  
5.7  
Dismounting Drives  
Since dismounting the drive to check the setting terminals, change the setting, or change the drive  
depends on the structure of the system cabinet, the work procedures must be determined in  
consideration of the requirements specific to the system. This section describes the general  
procedures and notes on dismounting the drive.  
It is recommended before dismounting the drive to make sure the spindle motor completely stops  
after power was turned off.  
a) Remove the power cable.  
b) Remove the SCSI cable.  
NC Model uses a single cable for power supply and the SCSI interface.  
c) When the external operator panel is mounted, remove the cable. If it is difficult to access the  
connector position, the cable may be removed after step e).  
d) Remove the DC ground cable.  
e) Remove the four mounting screws securing the drive, then remove the drive from the system  
cabinet.  
f) To store or transport the drive, keep it in an antistatic bag and provide packing (see Section  
5.1).  
5.8  
Spare Disk Drive  
See 2.1.1, “Model name and order number,” to order a disk drive for replacement or as a spare.  
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This page is intentionally left blank.  
CHAPTER 6  
DIAGNOSTICS AND MAINTENANCE  
6.1  
6.2  
6.3  
6.4  
Diagnostics  
Maintenance Information  
Operation Check  
Troubleshooting Procedures  
This chapter describes diagnostics and maintenance information.  
6.1  
Diagnostics  
6.1.1  
Self-diagnostics  
The IDD has the following self-diagnostic function. This function checks the basic operations of  
the IDD.  
Initial self-diagnostics  
Online self-diagnostics (SEND DIAGNOSTIC command)  
Table 6.1 lists the contents of the tests performed with the self-diagnostics. For a general check of  
the IDD including the operations of the host system and interface, use a test program that runs on  
the host system (see Subsection 6.1.2).  
Table 6.1  
Self-diagnostic functions  
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Brief test contents of self-diagnostics are as follows.  
a. Hardware function test  
This test checks the basic operation of the controller section, and contains following test.  
RAM (microcode is stored)  
Peripheral circuits of microprocessor (MPU)  
Memory (RAM)  
Data buffer  
b. Seek test  
This test checks the positioning operation of the disk drive using several seek modes (2 points  
seek, 1 position sequential seek, etc.). The positioning operation is checked with confirming  
the physical address information by reading the ID field (LBA) from the data block on track 0  
after completion of the seek operation to the target cylinder.  
c. Write/read test  
This test checks the write/read function by using the Internal test space of the disk drive.  
(1)  
Initial self-diagnostics  
When power is turned on, the IDD starts initial self-diagnostics. The initial self-diagnostics checks  
the basic operations of the hardware functions.  
If an error is detected in the initial self-diagnostics, the LED on the drive front panel blinks. In this  
status, the IDD posts the CHECK CONDITION status to all I/O operation requests other than the  
REQUEST SENSE command. When the CHECK CONDITION status is posted, the INIT should  
issue the REQUEST SENSE command. The sense data obtained with the REQUEST SENSE  
command details the error information detected with the initial self-diagnostics.  
Even if CHECK CONDITION status and sense data are posted, the LED continues blinking. Only  
when the power is turned off or re-turned on, this status can be cleared. When this status is  
cleared, the IDD executes the initial self-diagnosis again.  
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The IDD does not reply to the SCSI bus for up to 2 seconds after the initial self-diagnostics is  
started. After that, the IDD can accept the I/O operation request correctly, but the received  
command, except the executable commands under the not ready state (such as INQUIRY,  
START/STOP UNIT), is terminated with the CHECK CONDITION status (NOT READY  
[=2]/logical unit is in process of becoming ready [=04-01] or logical unit not ready, initializing  
command required [=04-02]) during the interval from the spindle motor becomes stable to the IDD  
becomes ready. The executable command under the not ready state is executed in parallel with the  
initial self-diagnostics, or is queued by the command queuing feature and is executed after  
completion of the initial self-diagnostics. When the command that comes under the exception  
condition of the command queuing is issued at that time, the IDD posts the BUSY status for the  
command. When the error is detected during the initial self-diagnostics, the CHECK  
CONDITION status is posted for all commands that were stacked during the initial self-  
diagnostics. For the command execution condition, refer to Section 1.4 and Subsection 1.7.4 in  
SCSI Logical Interface Specifications.  
(2)  
Online self-diagnostics (SEND DIAGNOSTIC command)  
The INIT can make the IDD execute self-diagnostics by issuing the SEND DIAGNOSTIC  
command.  
The INIT specifies the execution of self-diagnostics by setting 1 for the SelfTest bit on the CDB in the  
SEND DIAGNOSTIC command and specifies the test contents with the UnitOfl bit.  
When the UnitOfl bit on the CDB is set to 0, the IDD executes the hardware function test only  
once. When UnitOfl bit is set to 1, the IDD executes the hardware function test, seek (positioning)  
test, and data write/read test for the Internal test space only once.  
a. Error recovery during self-diagnostics  
During the self-diagnostics specified by the SEND DIAGNOSTIC command, when the  
recoverable error is detected during the seek or the write/read test, the IDD performs the error  
recovery according to the MODE SELECT parameter value (read/write error recovery  
parameter, additional error recovery parameter) which the INIT specifies at the time of issuing  
the SEND DIAGNOSTIC command.  
PER  
0
Operation of self-diagnostics  
The self-diagnostics continues when the error is recovered. The self-  
diagnostics terminates normally so far as the unrecoverable error is not  
detected.  
1
The self-diagnostics continues when the error is recovered. If the  
unrecoverable error is not detected, the consecutive tests are executed till last  
test but the self-diagnostics terminates with error. The error information  
indicates that of the last recovered error.  
b. Reporting result of self-diagnostics and error indication  
When all specified self-diagnostics terminate normally, the IDD posts the GOOD status for the  
SEND DIAGNOSTIC command.  
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6-3  
When an error is detected in the self-diagnostics, the IDD terminates the SEND DIAGNOSTIC  
command with the CHECK CONDITION status.  
The INIT should issue the REQUEST SENSE command when the CHECK CONDITION  
status is posted. The sense data collected by the REQUEST SENSE command indicates the  
detail information of the error detected in the self-diagnostics.  
The IDD status after the CHECK CONDITION status is posted differs according to the type of  
the detected error.  
a) When an error is detected in the seek or write/read test, the subsequent command can be  
accepted correctly. When the command other than the REQUEST SENSE and NO  
OPERATION is issued from the same INIT, the error information (sense data) is cleared.  
b) When an error is detected in the hardware function test, the IDD posts the CHECK  
CONDITION status for all I/O operation request except the REQUEST SENSE  
command. The error status is not cleared even if the error information (sense data) is  
read. Only when the power is turned off or re-turned on, the status can be cleared. When  
this status is cleared, the IDD executes the initial self-diagnostics again (see item (1)).  
Refer to Chapter 3 of SCSI Logical Interface Specifications for further details of the command  
specifications.  
CAUTION  
Data loss  
When the SEND DIAGNOSTIC command terminates with the  
CHECK CONDITION status, the INIT must collect the error  
information using the REQUEST SENSE command. The RECEIVE  
DIAGNOSTIC RESULTS command cannot read out the error  
information detected in the self-diagnostics.  
6.1.2  
Test programs  
The basic operations of the IDD itself can be checked with the self-diagnostic function. However,  
to check general operations such as the host system and interface operations in a status similar to  
the normal operation status, a test program that runs on the host system must be used.  
The structure and functions of the test program depend on the user system requirements.  
Generally, it is recommended to provide a general input/output test program that includes SCSI  
devices connected to the SCSI bus and input/output devices on other I/O ports.  
Including the following test items in the test program is recommended to test the IDD functions  
generally.  
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(1)  
(2)  
(3)  
(4)  
Interface (SCSI bus) test  
The operations of the SCSI bus and data buffer on the IDD are checked with the WRITE BUFFER  
and READ BUFFER commands.  
Basic operation test  
The basic operations of the IDD are checked by executing self-diagnosis with the SEND  
DIAGNOSTIC command (see Subsection 6.1.1).  
Random/sequential read test  
The positioning (seek) operation and read operation are tested in random access and sequential  
access modes with the READ, READ EXTENDED, or VERIFY command.  
Write/read test  
By using a data block in the internal test space, the write/read test can be executed with an arbitrary  
pattern for a disk drive in which user data is stored.  
6.2  
Maintenance Information  
6.2.1  
Precautions  
Take the following precautions to prevent injury during maintenance and troubleshooting:  
CAUTION  
1. To avoid shocks, turn off the power before connecting or disconnecting a  
cable, connector, or plug.  
2. To avoid injury, do not touch the mechanical assembly during disk drive  
operation.  
3. Do not use solvents to clean the disk drive.  
Take the following precautions to prevent disk drive damage during maintenance and  
troubleshooting:  
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6-5  
CAUTION  
1. Always ground yourself with a wrist strap connected to ground before  
handling. ESD (Electrostatics Discharge) may cause the damage to the  
device.  
2. To prevent electrical damage to the disk drive, turn the power off before  
connecting or disconnecting a cable, connector, or plug.  
3. Do not remove a PCA.  
4. Do not use a conductive cleaner to clean a disk drive assembly.  
5. Ribbon cables are marked with a colored line. Connect the ribbon cable to a  
cable connector with the colored wire connected to pin 1.  
6.2.2  
Maintenance requirements  
(1)  
Preventive maintenance  
Preventive maintenance such as replacing air filters is not required.  
CAUTION  
Damage  
Never open the disk enclosure in the field.  
Opening the disk enclosure may cause an irreparable fault.  
(2)  
Service life  
See "(3) Service life," in Section 2.1.5.  
6-6  
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(3)  
(4)  
Parts that can be replaced in the field  
The PCA cannot be replaced in the field. The DE cannot be replaced in the field.  
Service system and repairs  
Fujitsu has the service system and repair facility for the disk drive. Contact Fujitsu representative  
to submit information for replacing or repairing the disk drive. Generally, the following  
information must be included:  
a) IDD model, part number (P/N), revision number, serial number (S/N), and date of  
manufacturing  
b) Error status  
Date when the error occurred  
System configuration  
Environmental conditions (temperature, humidity, and voltage)  
c) Error history  
d) Error contents  
Outline of inconvenience  
Issued commands and specified parameters  
Sense data  
Other error analysis information  
CAUTION  
Data loss  
Save data stored on the disk drive before requesting repair. Fujitsu  
does not assume responsibility if data is destroyed during servicing  
or repair.  
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6-7  
See Section 5.1 for notes on packing and handling when returning the disk drive.  
6.2.3  
Maintenance levels  
If a disk drive is faulty, replace the whole disk drive since repair requires special tools and  
environment. This section explains the two maintenance levels.  
(1)  
Field maintenance (disk drive replacement)  
This replacement is done at the user's site.  
Replacement uses standard tools.  
Replacement is usually done by the user, retail dealer, distributor, or OEM engineer.  
(2)  
Factory maintenance (parts replacement)  
This replacement can only be done by Fujitsu.  
Replacement includes maintenance training and OEM engineer support. OEM engineers  
usually support retail dealers and distributors.  
Replacement uses factory tools and test equipment.  
6-8  
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6.2.4  
Revision numbers  
The revision number of the disk drive is represented with a letter and a number indicated on the  
revision label attached to the DE. Figure 6.1 shows the revision label format.  
Figure 6.1 Revision label  
(1)  
(2)  
Indicating revision number at factory shipment  
When the disk drive is shipped from the factory, the revision number is indicated by deleting  
numbers in the corresponding letter line up to the corresponding number with = (see Figure 6.2).  
Changing revision number in the field  
To change the revision number because parts are replaced or other modification is applied in the  
field, the new level is indicated by enclosing the corresponding number in the corresponding letter  
line with { (see Figure 6.2).  
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6-9  
IMPORTANT  
When the revision number is changed after the drive is shipped from  
the factory, Fujitsu issues "Engineering Change Request/Notice" in  
which the new revision number is indicated. When the user changes  
the revision number, the user should update the revision label as  
described in item (2) after applying the modification.  
At shipment  
Rev. A2  
Revising at field  
Rev. A3  
Figure 6.2 Indicating revision numbers  
6.2.5  
6.2.6  
Tools and test equipment  
Disk drive troubleshooting and repair in the field require only standard SCSI tools. No special  
tools or test equipment are required.  
This manual does not describe the factory-level tools and test equipment.  
Tests  
This disk drive can be tested in the following ways:  
Initial seek operation check (See Subsection 6.3.1)  
Operation test (See Subsection 6.3.2)  
Diagnostic test (See Subsection 6.3.3)  
Figure 6.3 shows the flow of these tests.  
6-10  
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Start  
Start self-test by  
turning the power on  
No  
Check host system  
(Table 6.2)  
Test results OK?  
Yes  
No  
Analyze system-related  
error  
Host system  
normal?  
Execute an operation  
test using a host  
computer or test  
equipment  
Yes  
Replaced or repair  
disk drive  
No  
Test results OK?  
No  
Disk drive  
normal?  
Yes  
Yes  
Continue operation  
Execute diagnostic  
test using a host  
computer or test  
equipment  
No  
Test results OK?  
Yes  
Test using voltage or  
temperature stress  
No  
Analyze disk drive  
error (Table 6.3)  
Test results OK?  
Yes  
Normal  
Figure 6.3 Test flowchart  
C141-E166  
6-11  
6.3  
Operation Check  
6.3.1  
Initial seek operation check  
If an error is detected during initialization by the initial seek operation check routine at power-on,  
the LED on the front panel blinks. The spindle motor of the disk drive then stops, and the disk  
drive is unusable.  
For an explanation of the operation check before the initial seek, refer to the Section 5.6.  
6.3.2  
Operation test  
While the host computer is processing data, the IDD monitors disk drive operation including data  
processing, command processing, and seek operations. If the IDD detects an error, the IDD posts  
the error to the INIT. The INIT then posts the error to the user.  
The user may detect an intermittent or nonfatal error such as abnormal noise, abnormal odor, or  
very slow operation.  
An error posted in an operation test must be investigated. Replace the disk drive to see whether  
the error was caused by the disk drive.  
Often, errors posted in an operation test may be caused by the host system. Possible causes include  
insufficient power capacity, loose cable connection, insufficient timing or insufficient mechanical  
play, and problems related to other systems.  
If an operation error is detected by the error detection circuit of the disk drive, an interrupt occurs.  
The interrupt is posted to the MCU on the PCA. The MCU stops the currently processed  
command, and causes the CHECK CONDITION status to post the error to the INIT.  
When receiving the CHECK CONDITION status, the INIT issues a REQUEST SENSE command  
to collect detailed information about the error. The INIT then issues a REZERO UNIT command  
to return the read/write head to track 00. In normal processing, the IDD itself or INIT determines  
how to handle the error (processing retry or stop).  
To analyze the error posted in the operation test, reconstruct the conditions in which the error  
occurred. Then, start troubleshooting the whole host system by replacing the disk drive.  
6.3.3  
Diagnostic test  
The diagnostic test is executed to find a faulty subassembly in a faulty disk drive, or to check disk  
drive performance. This test is usually a combination of specific disk drive functions or group of  
functions. This test may be executed using a different host computers or test equipment and away  
from the environment where the error first occurred.  
To analyze the error posted in the diagnostic test, reconstruct the conditions in which the error  
occurred. Then, look for a possibly faulty subassembly or part of the disk drive.  
The procedures to be used in this test depend largely on the type of test equipment used, and are  
not covered by this manual.  
6-12  
C141-E166  
6.4  
Troubleshooting Procedures  
6.4.1  
Outline of troubleshooting procedures  
This section explains the troubleshooting procedures for disk drive errors.  
Depending on the maintenance level, analyze the error to detect a possibly faulty part (disk drive,  
or disk drive part).  
Full-scale troubleshooting is usually required if the error cause is not known. If the error cause is  
clear (e.g., abnormal noise in disk enclosure or burning of a PCA), troubleshooting is  
straightforward.  
6.4.2  
Troubleshooting with disk drive replacement in the field  
At this level of maintenance, we recommend replacing the disk drive as a unit. If replacing the  
disk drive rectifies the fault, return the removed disk drive to the factory, for test and repair. If the  
newly installed disk drive does not rectify the fault another part of the system is faulty.  
Table 6.2 summarizes system-level field troubleshooting. Troubleshooting must be done in the  
field, to find faulty part (disk drive or system).  
C141-E166  
6-13  
Table 6.2  
System-level field troubleshooting  
Item  
DC power cable  
Recommended work  
Check that the power cable is correctly connected to the disk drive and  
power supply unit.  
DC power level  
Check that the DC voltage is within the specified range ( 5%).  
Check that the +5 VDC value (pins 3 and 4 of the power connector) is  
4.75 to 5.25 VDC.  
Check that the +12 VDC supply (pins 1 and 2 of the power connector of  
disk drive) is 11.4 to 12.6 VDC.  
Electrical noise  
Make sure the maximum ripple peak-to-peak value of +5 VDC is within  
250 mV and +12 VDC is within 250 mV.  
Make sure the high frequency noise (over 20 MHz) is less than 100 mVp-p.  
Interface cable connection  
Terminating resistors  
Check that the SCSI interface cable is correctly connected between the disk  
drive and controller.  
For a daisy chain connection, check the terminating resistor on the last disk  
drive only. For a star-burst connection, check that the terminating resistor  
is correctly mounted on all disk drives.  
Drive selection address  
Plug setup  
Check that the disk SCSI ID is set correctly.  
Check that the jumpers on the PCA are set so that the disk drive and host  
computer operate normally. See Section 5.3.  
System cables  
Check that all system cables are connected correctly.  
System diagnostic test  
When possible, execute the system level diagnostic routine as explained in  
the host computer manual. This gives a detailed report of a possible fault.  
Intermittent or nonfatal errors Check the AC voltage from the power supply. Check the DC voltage level  
at the power connector for the disk drive.  
If the AC voltage level is abnormal or there is a lot of electrical noise,  
notify the user of the error.  
If the DC voltage level is unstable, replace the power supply unit.  
If possible, replace the disk drive. If replacing the disk drive does not  
eliminate the error, the removed disk drive is probably not faulty. To  
continue error analysis, refer to the hardware and software manuals  
supplied with the system.  
6-14  
C141-E166  
6.4.3  
Troubleshooting at the repair site  
For maintenance at this level, we recommend additional testing of the disk drive and signal  
checking.  
The sense data posted from the IDD helps with troubleshooting. This sense data makes the error type  
clear (functional, mechanical, or electrical error). Chapter 7 error analysis by sense data, and gives  
supplementary information on finding the error cause (faulty part).  
Table 6.3 lists how to detect a faulty disk drive subassembly. This fault finding requires a working  
host computer or disk drive test equipment to recreate the error conditions.  
If the detected error cannot be recreated in an ordinary test, disk drive conditions can be changed  
to force the error to recur. This is done by changing the DC voltage or the ambient temperature of  
the disk drive.  
If the error does not recur with changed conditions, the disk drive is not faulty. If no error occurs  
in the disk drive test, notify the user of the test results, and find out from the user the environment  
conditions where the disk drive is used.  
Table 6.3  
Disk drive troubleshooting  
Recommended action  
Item  
Frequent or repeated seek errors  
Collect sense data, and see Chapter 7.  
Replace the disk drive, and check that the test method is correct. If the  
error recurs, it is likely that the disk drive is normal but the test method  
is incorrect.  
Intermittent or nonfatal errors  
Replace the disk drive, and check that the test method is correct. If the  
error recurs, it is likely that the disk drive is normal but the test method  
is incorrect.  
To check performance, change the disk drive conditions by changing  
the voltage or temperature.  
If the disk drive error recurs or a possibly faulty part is found by troubleshooting, return the  
complete disk drive to the factory for repair. A media defect list must be included with a disk  
drive returned to the factory.  
If the possibly faulty part is the disk enclosure, return the whole disk drive to the factory for repair.  
Also if a clear error (erroneous servo track information or noisy drive) is detected in the disk  
enclosure, return the whole disk drive to the factory. A media defect list must be included with a  
disk drive returned to the factory.  
CAUTION  
Damage  
Never open the disk enclosure in the field. Opening the disk  
enclosure may cause an irreparable fault.  
C141-E166  
6-15  
6.4.4  
6.4.5  
Troubleshooting with parts replacement in the factory  
This manual does not cover troubleshooting at the factory level.  
Finding possibly faulty parts  
Finding possibly faulty parts in the field was explained in Subsection 6.4.2. This manual does not  
cover finding possibly faulty parts at the factory level.  
6-16  
C141-E166  
CHAPTER 7  
ERROR ANALYSIS  
7.1  
7.2  
Error Analysis Information Collection  
Sense Data Analysis  
This chapter explains in detail how sense data collected from a disk drive is used for troubleshooting. Sense  
data reflects an error in the disk drive, and helps with troubleshooting.  
A sense key, sense code, and subsense code, taken from various sense data are repeated. Also in this  
chapter, troubleshooting is performed using these three codes. Unless otherwise specified, "sense data"  
means the above three codes. When sense data is represented as (x-xx-xx), the leftmost x is a sense key, the  
middle xx is a sense code, and the rightmost x is a subsense code.  
7.1  
Error Analysis Information Collection  
Sense data  
7.1.1  
When IDD posts a CHECK CONDITION status or detects a fatal error in the SCSI bus, the current  
command or queued command is cleared. In such a case, the IDD generates sense data about the  
command-issuing INIT. The INIT can read the sense data by issuing a REQUEST SENSE  
command.  
Even if a transfer byte length that is shorter than the sense data length of the tested device is  
specified, the command terminates normally. In this case, however, the INIT receives part of the  
sense data, but the remaining part of the sense data is lost.  
For details of the REQUEST SENSE command, refer to the SCSI Logical Interface Specifications.  
7.1.2  
Sense key, sense code, and subsense code  
If an error is detected in a disk drive, the error status is indicated in the sense data collected from  
the disk drive. Figure 7.1 shows the positions of a sense key, sense code, and subsense code.  
C141-E166  
7-1  
Bit 7  
Byte 0 Valid  
1
6
0
5
4
3
2
1
0
X‘70’ or X‘71’ (error code)  
X‘00’  
2
3
0
ILI  
0
Sense key  
[MSB]  
4
Information  
5
6
[LSB]  
7
X‘28’ (additional sense data length)  
Command-specific information  
8
Basic  
information  
[MSB]  
9
10  
11  
12  
13  
14  
[LSB]  
Sense code  
Subsense code  
X‘00’  
15 SKSV  
16  
17  
Sense key-specific information  
18  
19  
20  
X
0
0
0
SCSI ID  
CDB operation code  
Additional  
information  
Detail information  
47  
Figure 7.1 Format of extended sense data  
7-2  
C141-E166  
7.2  
Sense Data Analysis  
7.2.1  
Error information indicated with sense data  
Subsection 7.2.2 onwards explain troubleshooting using sense data.  
Table 7.1 lists the definition of sense data. For details of sense data, refer to the SCSI  
Logical Interface Specifications.  
Table 7.1 Definition of sense data  
Sense data  
Sense  
key  
Sense  
Code  
Sub  
Sense  
Code  
Definition  
00  
3
00  
00  
03  
Operation was normal.  
0C  
A write to a disk terminated abnormally.  
4
32  
40  
44  
C4  
01  
xx  
xx  
xx  
Failed to update the defect list due to a disk medium write error, etc.  
An error occurred in power-on self-diagnosis.  
A hardware error occurred inside IDD.  
A drive error occurred.  
1
3
1x  
1x  
xx  
xx  
A disk read error occurred.  
A disk read error occurred.  
E
5
1D  
00  
Data discrepancy found by VERIFY command byte check.  
2x  
3D  
90  
xx  
00  
00  
An SCSI error, such as an invalid operation code, occurred.  
The Reserve bit of the IDENTIFY message was set to 1.  
The RESERVE or RELEASE command cannot be executed because  
the SCSI ID of the INIT was not posted in the SELECTION phase.  
A parity error occurred in the SCSI data bus.  
An unmounted or inappropriate message was received.  
Before completion of a command, a command with the same tag  
number was issued.  
B
B
B
47  
49  
4D  
xx  
00  
xx  
B
4E  
00  
An overlap command was issued.  
C141-E166  
7-3  
7.2.2  
Sense data (3-0C-03), (4-40-xx), (4-44-xx), and (4-C4-xx)  
Sense data (3-0C-03), (4-40-xx), (4-44-xx), and (4-C4-xx) indicate one of the following:  
A target sector could not be detected using the sector counter.  
A seek process overran the specified time.  
A write to a disk terminated abnormally.  
An error occurred in power-on self-diagnosis.  
A hardware error occurred inside IDD.  
A drive error occurred.  
The symptoms above are generally caused by an error in a PCA or DE.  
For details of the sense data above, refer to the SCSI Logical Interface Specifications.  
7.2.3  
Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error  
If sense data (1-1x-xx), (3-1x-xx) or (E-1D-00) occurs frequently in a specific block of a disk,  
there is disk damage that was not recorded in the media defect list. In this case, assign an alternate  
block to the error-detected block using a REASSIGN BLOCKS command. For an explanation of  
the REASSIGN BLOCKS command, refer to the SCSI Logical Interface Specifications.  
If this error occurs in different blocks, a PCA or DE is faulty.  
For details of the above sense data, refer to the SCSI Logical Interface Specifications.  
7.2.4  
Sense data (5-2x-xx), (5-3D-00), (5-90-00), (B-47-xx), (B-49-00), (B-4D-xx) and (B-4E-00):  
SCSI interface error  
Sense data (5-2x-xx), (5-3D-00), (5-90-00), (B-47-xx), (B-49-00), (B-4D-xx) and (B-4E-00)  
indicates one of the following symptoms:  
An invalid or unsupported command was issued, or invalid or unsupported parameters were  
specified.  
A SCSI interface error occurred.  
A parity error occurred in the SCSI bus.  
If this error occurs, a PCA or the SCSI interface cable is faulty.  
For details of the above sense data, refer to the SCSI Logical Interface Specifications.  
7-4  
C141-E166  
APPENDIX A SETTING TERMINALS  
A.1 Setting Terminals (on NP model only)  
This appendix describes setting terminals.  
C141-E166  
A-1  
A.1  
Setting Terminals (on NP model only)  
Table A.1  
CN2 setting terminal (on NP model drives only)  
Pins  
5 - 6  
Setting item  
Setting contents  
1 - 2  
3 - 4  
7 - 8 9 - 10  
SCSI ID  
Open Open Open (Open)  
Short Open Open (Open)  
Open Short Open (Open)  
Short Short Open (Open)  
Open Open Short (Open)  
Short Open Short (Open)  
Open Short Short (Open)  
Short Short Short (Open)  
Open Open Open Short  
Short Open Open Short  
Open Short Open Short  
Short Short Open Short  
Open Open Short Short  
Short Open Short Short  
Open Short Short Short  
Short Short Short Short  
SCSI ID #0  
SCSI ID #1  
SCSI ID #2  
SCSI ID #3  
SCSI ID #4  
SCSI ID #5  
SCSI ID #6  
SCSI ID #7  
SCSI ID #8  
SCSI ID #9  
(Common to 8-bit and 16-bit SCSI)  
(Common to 8-bit and 16-bit SCSI)  
(Common to 8-bit and 16-bit SCSI)  
(Common to 8-bit and 16-bit SCSI)  
(Common to 8-bit and 16-bit SCSI)  
(Common to 8-bit and 16-bit SCSI)  
(Common to 8-bit and 16-bit SCSI)  
(Common to 8-bit and 16-bit SCSI)  
(16-bit SCSI only)  
(16-bit SCSI only)  
SCSI ID #10 (16-bit SCSI only)  
SCSI ID #11 (16-bit SCSI only)  
SCSI ID #12 (16-bit SCSI only)  
SCSI ID #13 (16-bit SCSI only)  
SCSI ID #14 (16-bit SCSI only)  
SCSI ID #15 (16-bit SCSI only) (*)  
Open Write operation is enabled. (*)  
Short Write operation is disabled.  
Write protect  
Pins  
Setting item  
Setting contents  
11 - 12 13 - 14 15 - 16 23 - 24  
Motor start mode  
Open  
Short  
Started by the START/STOP command  
Started by turning the power supply on (*)  
Width of 16 bit bus (*)  
Force Narrow  
Open  
Short  
Width of 8 bit bus  
Force Single Ended  
Terminating power supply  
Open  
Short  
Follows DIFFSNS signal level on SCSI bus (*)  
Single-Ended mode  
Open Does not supply terminating resistor power to SCSI BUS  
Short Supply terminating resistor power to SCSI BUS (*)  
* Setting at factory shipment  
Note:  
See the description of Section 5.3 for details of the setting requirements and notes.  
A-2  
C141-E166  
APPENDIX B  
CONNECTOR SIGNAL ALLOCATION  
B.1 SCSI Connector Signal Allocation: SCA2 type LVD  
16-bit SCSI  
B.2 SCSI Connector Signal Allocation: 68 pin type LVD  
16-bit SCSI  
This appendix describes the connector signal allocation.  
C141-E166  
B-1  
B.1  
SCSI Connector Signal Allocation: SCA2 type LVD 16-bit SCSI  
Table B.1  
SCSI connector (SCA2 type LVD 16-bit SCSI): CN1  
Pin No.  
Signal  
+12V (Charge)  
Signal  
Pin No.  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
59  
60  
61  
62  
63  
64  
65  
66  
67  
68  
69  
70  
71  
72  
73  
74  
75  
76  
77  
78  
79  
80  
01  
02  
03  
04  
05  
06  
07  
08  
09  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
12V RETURN (GND)  
+12V  
+12V  
12V RETURN (GND)  
12V RETURN (GND)  
+12V  
MATED 1  
Reserved (N.C.)  
Reserved (N.C.)  
–DB11  
Reserved (N.C.)  
DIFFSNS  
DB11  
–DB10  
DB10  
–DB09  
DB09  
–DB08  
DB08  
–I/O  
I/O  
–REQ  
REQ  
–C/D  
C/D  
–SEL  
SEL  
–MSG  
MSG  
–RST  
RST  
ACK  
–ACK  
–BSY  
BSY  
–ATN  
ATN  
–P_CRCA  
–DB07  
P_CRCA  
DB07  
–DB06  
DB06  
–DB05  
DB05  
–DB04  
DB04  
–DB03  
DB03  
–DB02  
DB02  
–DB01  
DB01  
–DB00  
DB00  
–DBP1  
DBP1  
–DB15  
DB15  
–DB14  
DB14  
–DB13  
DB13  
–DB12  
DB12  
5V  
5V RETURN (MATED 2)  
5V RETURN (GND)  
5V RETURN (GND)  
–LED  
5V  
5V (Charge)  
N. C. (–SPINDLE SYNC)  
RMT START  
SCSI ID0  
SCSI ID2  
DLYD START  
SCSI ID1  
SCSI ID3  
B-2  
C141-E166  
B.2  
SCSI Connector Signal Allocation: 68 pin type LVD 16-bit SCSI  
Table B.2  
SCSI connector (68 pin type LVD 16-bit SCSI): CN1  
Signal  
Pin No.  
Signal  
–DB12  
–DB13  
–DB14  
–DB15  
–DBP1  
–DB00  
–DB01  
–DB02  
–DB03  
–DB04  
–DB05  
–DB06  
–DB07  
–P_CRCA  
GND  
Pin No.  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
59  
60  
61  
62  
63  
64  
65  
66  
67  
68  
01  
02  
03  
04  
05  
06  
07  
08  
09  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
DB12  
DB13  
DB14  
DB15  
DBP1  
DB00  
DB01  
DB02  
DB03  
DB04  
DB05  
DB06  
DB07  
P_CRCA  
GND  
DIFFSNS  
TERMPWR*  
TERMPWR*  
(Reserved)  
GND  
GND  
TERMPWR*  
TERMPWR*  
(Reserved)  
GND  
ATN  
–ATN  
GND  
GND  
BSY  
–BSY  
ACK  
–ACK  
RST  
–RST  
MSG  
–MSG  
SEL  
–SEL  
C/D  
–C/D  
REQ  
–REQ  
I/O  
–I/O  
DB08  
–DB08  
–DB09  
–DB10  
–DB11  
DB09  
DB10  
DB11  
*1 Power supply for the terminating resistor  
C141-E166  
B-3  
This page is intentionally left blank.  
INDEX  
+12 VDC.........................................................4-8  
1-1x-xx............................................................7-4  
16-bit SCSI ID external input........................4-16  
16-bit SCSI interface connector ....................4-14  
3-0C-03 ...........................................................7-4  
3-1x-xx............................................................7-4  
4-40-xx............................................................7-4  
4-44-xx............................................................7-4  
4-C4-xx ...........................................................7-4  
5-2x-xx............................................................7-4  
5-3D-00 ...........................................................7-4  
5-90-00............................................................7-4  
68 pin type LVD 16-bit SCSI.........................B-3  
8-bit SCSI/16-bit SCSI....................................1-2  
C
cache feature....................................................1-3  
caching parameter .........................................5-22  
changing revision number in field...................6-9  
check before mounting..................................5-11  
check items at illegal operation.....................5-13  
checking at abnormal end..............................5-17  
checking procedure .......................................5-14  
checking SCSI connection .........5-14, 5-15, 5-16  
CN1 ........................................................B-2, B-3  
CN2 setting terminal ......................................A-2  
command queuing feature...............................1-3  
compactness ....................................................1-2  
confirming initial operation...........................5-13  
confirming operation after installation and  
A
AC noise filter...............................................4-11  
actuator............................................................1-7  
addressing of peripheral device.....................1-10  
air circulation  
(recirculation filter, breather filter)............1-8  
allowable input voltage and current ................4-8  
alternate area .................................................3-10  
alternate block allocation ..............................3-11  
alternate block allocation by REASSIGN  
BLOCKS command.................................3-14  
alternate block allocation during  
preparation for use...................................5-13  
connecting cable............................................5-12  
connection .......................................................5-3  
connector signal allocation.............................B-1  
continuous block processing ...........................1-3  
control mode parameter.................................5-22  
controller circuit..............................................1-8  
current waveform ............................................4-8  
cylinder configuration .....................................3-2  
D
FORMAT UNIT command execution.....3-12  
alternate cylinder.............................................3-5  
alternate spare area..........................................3-4  
automatic alternate block allocation..............3-14  
automatic alternate block allocation  
data format ......................................................3-1  
data space ........................................................3-1  
default mode setting  
(by CHANGE DEFINITION command).5-10  
defect list .......................................................3-11  
defect management........................................3-11  
defective block slipping ..................................1-4  
definition of sense data....................................7-3  
delivery............................................................5-2  
diagnosis..........................................................1-5  
diagnostic ........................................................6-1  
diagnostic and maintenance ............................6-1  
diagnostic test................................................6-12  
disconnection/reconnection parameter..........5-21  
disk..................................................................1-7  
disk drive troubleshooting.............................6-15  
disk read error .................................................7-4  
dismounting drive..........................................5-23  
at write operation.....................................3-15  
automatic alternate block reassignment ..........1-4  
B
B-47-xx ...........................................................7-4  
B-49-00 ...........................................................7-4  
B-4D-xx ..........................................................7-4  
B-4E-00...........................................................7-4  
basic operation test..........................................6-5  
BCRC ..............................................................3-8  
block address of user space...........................3-10  
bock descriptor..............................................5-17  
C141-E166  
IN-1  
E
internal test space ............................................3-4  
E-1D-00...........................................................7-4  
each mode setting............................................5-8  
ECC.................................................................3-8  
environmental specification ............................2-4  
environmental temperature..............................4-6  
environmental/power requirement ..................2-4  
error analysis...................................................7-1  
error analysis information collection...............7-1  
error information indicated with sense data ....7-3  
error rate..........................................................2-5  
error recovery..................................................1-4  
error recovery during self-diagnostic..............6-3  
error recovery parameter...............................5-20  
external dimension ..........................................4-1  
external magnetic field....................................4-7  
external operator panel circuit example ........4-21  
external operator panel connector .................4-15  
L
large capacity ..................................................1-5  
leak magnetic flux...........................................4-7  
limitation of bottom-mounting........................4-5  
limitation of side-mounting.............................4-5  
logical data block addressing ..........................3-9  
low noise and low vibration ............................1-5  
low power consumption ..................................1-5  
M
maintenance level............................................6-8  
maintenance requirement ................................6-6  
mean time between failure (MTBF)................2-5  
mean time to repair (MTTR)...........................2-6  
microcode downloading..................................1-5  
MODE SELECT/MODE SELECT EXTENDED  
command .................................................5-17  
mode setting ..................................................5-10  
motor start mode .............................................5-8  
motor start mode setting..................................5-8  
mounting .........................................................4-4  
mounting drive ..............................................5-11  
mounting frame structure ........................ 4-4, 4-5  
mounting procedure ......................................5-11  
mounting requirement .....................................4-1  
F
factory maintenance (parts replacement) ........6-8  
field maintenance (disk drive replacement) ....6-8  
finding possibly faulty part ...........................6-16  
format capacity................................................3-9  
format of extended sense data.........................7-2  
format parameter...........................................5-18  
FORMAT UNIT command...........................5-18  
formatting......................................................5-17  
N
G
NC connector location...................................4-11  
NC external dimension....................................4-2  
NC model drive outer view .............................1-6  
note on handling drive.....................................5-1  
note on mounting.............................................4-4  
NP connector and terminal location..............4-13  
NP external dimensions...................................4-3  
NP model drive outer view..............................1-6  
gaps .................................................................3-8  
general description ..........................................1-1  
general note.....................................................5-1  
H
hardware function test.....................................6-2  
hardware structure...........................................1-6  
head .................................................................1-7  
high speed data transfer...................................1-2  
high speed positioning.....................................1-4  
O
online self-diagnostic ......................................6-3  
operation check .............................................6-12  
operation test .................................................6-12  
outline of troubleshooting procedure ............6-13  
output signal for external LED......................4-18  
I
indicating revision number............................6-10  
indicating revision number  
at factory shipment ....................................6-9  
initial seek operation check...........................6-12  
initial self-diagnostic.......................................6-2  
installation.......................................................5-1  
installation requirement...................................4-1  
installation/removal/replacement ....................5-2  
interface (SCSI bus) test..................................6-5  
P
packaging ........................................................5-2  
PAD.................................................................3-8  
page code = 1 ................................................5-20  
page code = 2 ................................................5-21  
page code = 7 ................................................5-20  
IN-2  
C141-E166  
parts that can be replaced in field....................6-7  
physical sector allocation ................................3-5  
PLO Sync ........................................................3-8  
positioning error rate.......................................2-5  
power on/off sequence ............................ 4-8, 4-9  
power supply connector ................................4-14  
power supply requirement...............................4-8  
precaution........................................................6-5  
preventive maintenance...................................6-6  
programmable data block length.....................1-4  
programmable multi-segment data buffer.......1-3  
setting of SCSI interface operation mode........5-9  
setting parameter ...........................................5-19  
setting SCSI terminator power supply.............5-8  
setting terminal....................................... 5-5, A-1  
setting terminal (on NP model only)..............A-2  
setting terminal location..................................5-5  
setting terminator power supply......................5-8  
spare area in cell..............................................3-5  
spare disk drive .............................................5-23  
specification ....................................................2-1  
spindle motor...................................................1-7  
standard feature ...............................................1-2  
START/STOP command...............................5-13  
start/stop of spindle motor...............................1-5  
storage .............................................................5-2  
surface temperature check point......................4-6  
surface temperature measurement point..........4-6  
system configuration .......................................1-9  
system space....................................................3-4  
system-level field troubleshooting ................6-14  
R
random/sequential read test.............................6-5  
read/write circuit .............................................1-8  
read/write error recovery parameter..............5-20  
recommended component for connection .....4-20  
reliability .........................................................2-5  
reporting result of self-diagnostic  
and error indication....................................6-3  
reserve and release function ............................1-4  
revision label...................................................6-9  
revision number...............................................6-9  
T
test .................................................................6-10  
test flowchart.................................................6-11  
test program.....................................................6-4  
tool and test equipment .................................6-10  
track format.....................................................3-5  
track skew and head skew ...............................3-6  
troubleshooting at repair site.........................6-15  
troubleshooting procedure.............................6-13  
troubleshooting with disk drive replacement in  
field..........................................................6-13  
troubleshooting with part replacement in factory  
.................................................................6-16  
S
SCA2 type LVD 16-bit SCSI.........................B-2  
SCA2 type SCSI connector...........................4-12  
SCSI bus configuration .................................1-10  
SCSI bus connection .......................................5-4  
SCSI cable connection ..................................4-19  
SCSI connector.......................................B-2, B-3  
SCSI connector signal allocation ...........B-2, B-3  
SCSI function specification.............................2-7  
SCSI ID setting........................................ 5-6, 5-7  
SCSI interface error.........................................7-4  
SCSI standard..................................................1-2  
sector format....................................................3-7  
seek test...........................................................6-2  
self-diagnostic .................................................6-1  
self-diagnostic function...................................6-1  
SEND DIAGNOSTIC command ....................6-3  
sense data ................................................ 7-1, 7-4  
sense data analysis...........................................7-3  
sense key, sense code, and subsense code.......7-1  
service clearance area......................................4-6  
service life.......................................................6-6  
service system and repair ................................6-7  
setting bus width of SCSI interface.................5-9  
setting check list (NP model only) ................5-11  
U
unpackaging ....................................................5-2  
unrecoverable error rate ..................................2-5  
user space ........................................................3-3  
V
verify error recovery parameter.....................5-20  
W
write protect ....................................................5-9  
write protect setting.........................................5-9  
write/read test.......................................... 6-2, 6-5  
C141-E166  
IN-3  
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C141-E166-02EN  
MAP3147NC/NP, MAP3735NC/NP, MAP3367NC/NP  
DISK DRIVES PRODUCT/MAINTENANCE MANUAL  
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