Fujitsu MBA3300NC User Manual
C141-E270-01EN  
MBA3300NC, MBA3300NP  
MBA3147NC, MBA3147NP  
MBA3073NC, MBA3073NP  
HARD DISK DRIVES  
PRODUCT MANUAL  
REVISION RECORD  
Edition Date published  
Revised contents  
01  
October, 2007  
Specification No.: C141-E270-**EN  
C141-E270  
Related Standards  
Product specifications and functions described in this manual comply with the following ANSI  
(*1) standards.  
Document number  
Title  
T10/1236D Rev.20 [NCITS.351:2001]  
T10/996D Rev.8c [NCITS.306:1998]  
T10/1157D Rev.24  
SCSI Primary Commands-2 (SPC-2)  
SCSI-3 Block Commands (SBC)  
SCSI Architecture Model-2 (SAM-2)  
SCSI Parallel Interface-4 (SPI-4)  
T10/1365D Rev.10  
*1 ANSI = American National Standard Institute  
In case of conflict between this manual and any referenced document, this manual takes  
precedence.  
Compliance with Administration on the Control of Pollution Caused by Electronic  
Information Products of the People's Republic of China  
This product is shipped as a component to manufacture the final products. Therefore, the  
packaging material code provided in GB18455-2001 is not marked on any packaging part of this  
product.  
C141-E270  
PREFACE  
This manual describes the MBA3300NC, MBA3300NP, MBA3147NC, MBA3147NP, MBA3073NC, and  
MBA3073NP 3.5-inch SCSI hard disk drives.  
This manual details the specifications and functions of the above disk drives, 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 SCSI 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 seven chapters and two appendixes:  
CHAPTER 1  
This chapter introduces the standard features, hardware, and system configuration of the HDD.  
CHAPTER 2 SPECIFICATIONS  
This chapter gives detailed specifications of the HDD and the installation environment.  
CHAPTER 3 DATA FORMAT  
This chapter describes the data structure, the addressing method, and the defect management.  
CHAPTER 4 INSTALLATION REQUIREMENTS  
This chapter describes the basic physical and electrical requirements for installing the disk drives.  
CHAPTER 5 INSTALLATION  
GENERAL DESCRIPTION  
This chapter explains how to install the 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  
DIAGNOSTICS AND MAINTENANCE  
This chapter describes the automatic diagnosis and maintenance of the 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-E270  
1
CONVENTIONS USED IN THIS MANUAL  
The MBA3300NC, MBA3300NP, MBA3147NC, MBA3147NP, MBA3073NC, and MBA3073NP disk  
drives are described as "the hard disk drive (HDD)," "the disk 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".  
CONVENTIONS FOR ALERT MESSAGES  
This manual uses the following conventions to show the alert messages. An alert message consists of an  
alert signal and alert statements. The alert signal consists of an alert symbol and a signal word or just a  
signal word.  
The following are the alert signals and their meanings:  
This indicates that either minor or moderate  
personal injury may occur if the user does not  
perform the procedure correctly.  
CAUTION  
This indicates information that the helps the user  
use the product more effectively.  
IMPORTANT  
In the text, the alert signal is centered, followed below by the indented message. A wider line space  
precedes and follows the alert message to show where the alert message begins and ends. The following is  
an example:  
(Example)  
CAUTION  
Damage  
Never remove any labels from the HDD or deface them in any way.  
The main alert messages in the text are also listed in the "Important Alert Items."  
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.  
2
C141-E270  
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  
50  
Installation  
Damage  
Never remove any labels from the HDD or deface them in any way.  
High temperature  
To prevent injury, never touch the HDD while it is hot. The DE and LSI  
become hot during operation and remain hot immediately after turning off the  
power.  
71  
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.  
75  
2. Do not change the setting of terminals except following setting pins  
during the power is turned on.  
• Write protect: Pin pair 9/10 of the CN2 setting terminal  
(NP model only)  
3. To short the setting terminal, use the short plug attached when the device  
is shipped from the factory.  
Damage  
1. Make sure that system power is off before connecting or disconnecting  
cables.  
82  
82  
2. Do not connect or disconnect cables when power is on.(except NC model)  
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.  
C141-E270  
3
Task  
Alert message  
Page  
93  
Installation  
High temperature  
To prevent injury, never touch the HDD while it is hot. The DE and LSI  
become hot during operation and remain hot immediately after turning off the  
power.  
Diagnostics and  
Maintenance  
Data loss  
When the SEND DIAGNOSTIC command terminates with the CHECK  
CONDITION status, the initiator 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.  
98  
99  
Data loss  
Save data stored on the HDD to other media before requesting repair. Fujitsu  
does not assume responsibility if data is corrupted during servicing or repair.  
High temperature  
To prevent injury, never touch the HDD while it is hot. The DE and LSI  
become hot during operation and remain hot immediately after turning off the  
power.  
99  
Electrical shock  
100  
-
To avoid shocks, turn off the power before connecting or disconnecting a  
cable, connector, or plug.  
-
Never touch the HDDs while power-feeding.  
Damage  
-
Always ground yourself with a wrist strap connected to ground before  
handling. ESD (Electrostatics Discharge) may cause the damage to the  
device.  
100  
-
To prevent electrical damage to the HDD, turn the power off before  
connecting or disconnecting a cable, connector, or plug.  
-
-
-
Never remove a PCBA.  
Never use a conductive cleaner to clean the HDDs.  
Ribbon cables are marked with a colored line. Connect the ribbon cable  
to a cable connector with the colored wire connected to pin 1.  
-
Never open the HDD for any reason.  
Damage  
-
-
Never remove any labels from the HDD or deface them in any way.  
Never open the DE for any reason. Doing so will void any warranties.  
107  
4
C141-E270  
MANUAL ORGANIZATION  
PRODUCT  
MANUAL  
1. General Description  
2. Specifications  
3. Data Format  
(This manual)  
4. Installation Requirements  
5. Installation  
6. Diagnostics and Maintenance  
7. Error Analysis  
SCSI PHYSICAL  
INTERFACE  
SPECIFICATIONS  
1. SCSI Bus  
2. SCSI Message  
3. Error Recovery  
SCSI LOGICAL  
INTERFACE  
SPECIFICATIONS  
1. Command Processing  
2. Data Buffer Management  
3. Command Specifications  
4. Parameter Data Formats  
5. Sense Data and Error Recovery Method  
6. Disk Media Management  
C141-E270  
5
This page is intentionally left blank.  
CONTENTS  
page  
CHAPTER 1 GENERAL DESCRIPTION............................................................................ 13  
1.1  
1.2  
1.3  
Standard Features ............................................................................................................. 14  
Hardware Structure .......................................................................................................... 18  
System Configuration....................................................................................................... 19  
CHAPTER 2 SPECIFICATIONS .......................................................................................... 21  
2.1  
Hardware Specifications................................................................................................... 21  
Model name and order number ........................................................................................ 21  
Function specifications..................................................................................................... 22  
Environmental specifications ........................................................................................... 25  
Error rate .......................................................................................................................... 26  
Reliability......................................................................................................................... 27  
SCSI Function Specifications........................................................................................... 29  
2.1.1  
2.1.2  
2.1.3  
2.1.4  
2.1.5  
2.2  
CHAPTER 3 DATA FORMAT.............................................................................................. 31  
3.1  
Data Space........................................................................................................................ 31  
Cylinder configuration ..................................................................................................... 31  
Alternate spare area.......................................................................................................... 33  
Track format..................................................................................................................... 35  
Sector format.................................................................................................................... 36  
Format capacity................................................................................................................ 38  
Logical Data Block Addressing ....................................................................................... 38  
Defect Management ......................................................................................................... 40  
Defect list ......................................................................................................................... 40  
Alternate block allocation ................................................................................................ 40  
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............................................................ 47  
4.1  
Mounting Requirements................................................................................................... 47  
External dimensions ......................................................................................................... 47  
Mounting orientations ...................................................................................................... 50  
Notes on mounting ........................................................................................................... 50  
Power Supply Requirements ............................................................................................ 53  
Connection Requirements ................................................................................................ 58  
SCA2 connector type 16-bit SCSI model (NC model)..................................................... 58  
4.1.1  
4.1.2  
4.1.3  
4.2  
4.3  
4.3.1  
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7
4.3.2  
4.3.3  
4.3.4  
68-pin connector type 16-bit SCSI model (NP model) .................................................... 60  
Cable connector requirements.......................................................................................... 67  
External operator panel (on NP model drives only)......................................................... 68  
CHAPTER 5 INSTALLATION.............................................................................................. 71  
5.1  
Notes on Handling HDDs ................................................................................................ 71  
Connections...................................................................................................................... 73  
Setting Terminals ............................................................................................................. 75  
SCSI ID setting................................................................................................................. 76  
Each mode setting ............................................................................................................ 78  
Mode settings ................................................................................................................... 80  
Mounting HDDs............................................................................................................... 81  
Check before mounting .................................................................................................... 81  
Mounting procedures........................................................................................................ 81  
Connecting Cables............................................................................................................ 82  
Checking Operation after Installation and Preparing the HDDs for Use ......................... 83  
Confirming initial operations ........................................................................................... 83  
Checking SCSI connection............................................................................................... 84  
Formatting ........................................................................................................................ 87  
Setting parameters............................................................................................................ 89  
Dismounting HDDs.......................................................................................................... 93  
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  
CHAPTER 6 DIAGNOSTICS AND MAINTENANCE....................................................... 95  
6.1  
Diagnostics....................................................................................................................... 95  
Self-diagnostics ................................................................................................................ 95  
Test programs................................................................................................................... 98  
Maintenance ..................................................................................................................... 99  
Precautions ....................................................................................................................... 99  
Maintenance requirements................................................................................................ 100  
Maintenance levels........................................................................................................... 101  
Tools and test equipment.................................................................................................. 102  
Tests ................................................................................................................................. 102  
Operation Check............................................................................................................... 104  
Initial seek operation check.............................................................................................. 104  
Operation test ................................................................................................................... 104  
Diagnostic test.................................................................................................................. 104  
Troubleshooting ............................................................................................................... 105  
6.1.1  
6.1.2  
6.2  
6.2.1  
6.2.2  
6.2.3  
6.2.4  
6.2.5  
6.3  
6.3.1  
6.3.2  
6.3.3  
6.4  
8
C141-E270  
6.4.1  
6.4.2  
6.4.3  
6.4.4  
6.4.5  
6.5  
Outline of troubleshooting procedures............................................................................. 105  
Troubleshooting with HDD replacement in the field....................................................... 105  
Troubleshooting at the repair site..................................................................................... 107  
Troubleshooting with parts replacement in the factory.................................................... 108  
Finding possibly faulty parts............................................................................................ 108  
Packaging ......................................................................................................................... 108  
Single HDD packaging..................................................................................................... 108  
Multi-box packaging ........................................................................................................ 110  
6.5.1  
6.5.2  
CHAPTER 7 ERROR ANALYSIS......................................................................................... 113  
7.1  
Sense Data Collection ...................................................................................................... 113  
Sense data......................................................................................................................... 113  
Sense data format ............................................................................................................. 113  
Sense Data Analysis......................................................................................................... 115  
Error information indicated with sense data..................................................................... 115  
Sense data (3-0C-03), (4-32-00), (4-40-xx), and (4-C4-xx) ............................................ 116  
Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error................................... 116  
Sense data (4-44-xx), (5-2x-xx), (5-90-00), (B-44-xx), (B-47-xx), (B-48-00),  
7.1.1  
7.1.2  
7.2  
7.2.1  
7.2.2  
7.2.3  
7.2.4  
(B-49-00), (B-4D-xx) and (B-4E-00): SCSI interface error............................................ 116  
APPENDIX A SETTING TERMINALS................................................................................. 117  
A.1 Setting Terminals (on NP model only)............................................................................. 118  
APPENDIX B CONNECTOR SIGNAL ALLOCATION ..................................................... 119  
B.1  
B.2  
SCSI Connector Signal Allocation: SCA2 type LVD 16-bit SCSI................................. 120  
SCSI Connector Signal Allocation: 68-pin type LVD 16-bit SCSI ................................ 121  
GLOSSARY.................................................................................................................................. 123  
ACRONYMS AND ABBREVIATIONS .................................................................................... 125  
INDEX ....................................................................................................................................... 127  
C141-E270  
9
FIGURES  
page  
Figure 1.1  
System configuration...........................................................................................................19  
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.........................................................................................................32  
Spare area in cell..................................................................................................................34  
Alternate cylinder ................................................................................................................34  
Track format ........................................................................................................................35  
Track skew/head skew.........................................................................................................36  
Sector format .......................................................................................................................36  
Alternate block allocation by FORMAT UNIT command..................................................42  
Alternate block allocation by REASSIGN BLOCKS command.........................................43  
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 model dimensions..........................................................................................................48  
NP model dimensions..........................................................................................................49  
HDD orientations.................................................................................................................50  
Mounting frame structure ....................................................................................................51  
Limitation of side-mounting................................................................................................52  
Surface temperature measurement points............................................................................53  
Current waveform (Spin-up) ...............................................................................................54  
Current waveform (Max seek).............................................................................................55  
Power on/off sequence (1)...................................................................................................55  
Figure 4.10 Power on/off sequence (2)...................................................................................................56  
Figure 4.11 Power on/off sequence (3)...................................................................................................56  
Figure 4.12 AC noise filter (recommended) ...........................................................................................58  
Figure 4.13 NC connectors location .......................................................................................................58  
Figure 4.14 SCA2 type 16-bit SCSI connector.......................................................................................59  
Figure 4.15 NP connectors and terminals location .................................................................................60  
Figure 4.16 68-pin type 16-bit SCSI interface connector .......................................................................61  
Figure 4.17 Power supply connector (68-pin type 16-bit SCSI).............................................................61  
Figure 4.18 External operator panel connector (CN1)............................................................................62  
Figure 4.19 External operator panel connector (CN2)............................................................................62  
Figure 4.20 16-bit SCSI ID external input..............................................................................................63  
Figure 4.21 Output signal for external LED ...........................................................................................65  
Figure 4.22 SCSI cables connection .......................................................................................................66  
10  
C141-E270  
Figure 4.23 External operator panel circuit example..............................................................................68  
Figure 5.1  
Figure 5.2  
Figure 5.3  
Figure 5.4  
Figure 5.5  
SCSI bus connections..........................................................................................................74  
Setting terminals location (on NP models only)..................................................................75  
CN2 setting terminal (on NP models only) .........................................................................76  
Checking the SCSI connection (A) .....................................................................................85  
Checking the SCSI connection (B)......................................................................................86  
Figure 6.1  
Figure 6.2  
Figure 6.3  
Figure 6.4  
Test flowchart....................................................................................................................103  
Single HDD packaging......................................................................................................108  
Multi-box packaging..........................................................................................................110  
Fraction packaging ............................................................................................................111  
Figure 7.1  
Sense data format...............................................................................................................114  
C141-E270  
11  
TABLES  
page  
Table 2.1  
Table 2.2  
Table 2.2  
Table 2.3  
Table 2.3  
Table 2.4  
Model names and order numbers.........................................................................................21  
Function specifications........................................................................................................22  
Function specifications (continued).....................................................................................23  
Environmental/power requirements.....................................................................................25  
Environmental/power requirements (continued) .................................................................26  
SCSI function specifications ...............................................................................................29  
Table 3.1  
Format capacity ...................................................................................................................38  
Table 4.1  
Table 4.2  
Surface temperature check point .........................................................................................52  
Recommended components for connection.........................................................................67  
Table 5.1  
Table 5.2  
Table 5.3  
Table 5.4  
Table 5.5  
Table 5.6  
Table 5.7  
Table 5.8  
SCSI ID setting....................................................................................................................77  
Setting SCSI terminator power supply (NP model).............................................................78  
Motor start mode setting......................................................................................................78  
Write protect setting (NP model).........................................................................................79  
Setting of the SCSI interface operation mode (NP model)..................................................79  
Setting the bus width of the SCSI interface (NP model) ....................................................79  
Default mode settings (by CHANGE DEFINITION command).........................................80  
Setting check list (NP model only)......................................................................................81  
Table 6.1  
Table 6.2  
Table 6.3  
Self-diagnostic functions.....................................................................................................95  
System-level field troubleshooting....................................................................................106  
HDD troubleshooting ........................................................................................................107  
Table 7.1  
Table A.1  
Definition of sense data.....................................................................................................115  
CN2 setting terminal (on NP model drives only) ..............................................................118  
Table B.1  
Table B.2  
SCSI connector (SCA2 type LVD 16-bit SCSI): CN1.....................................................120  
SCSI connector (68-pin type LVD 16-bit SCSI): CN1 ....................................................121  
12  
C141-E270  
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 MBA3xxxxx.  
The HDDs are high performance large capacity 3.5-inch hard disk drives with an embedded SCSI  
controller.  
The HDDs support the Small Computer System Interface (SCSI) as described in the ANSI SCSI SPI-4  
[T10/1365D Rev.10] to the extent described in this manual.  
The flexibility and expandability of the SCSI, as well as the powerful command set of the HDD, 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 Chapter 6 “Disk Media Management” of the SCSI Logical Interface Specifications for  
details.  
C141-E270  
13  
1.1  
Standard Features  
(1)  
Compactness  
Since the SCSI controller circuit is embedded in the standard 3.5-inch hard disk drive form factor,  
the HDD is extremely compact. The HDD can be connected directly to the SCSI bus of the host  
system.  
(2)  
(3)  
Environmental Protection  
The HDDs comply with the Restriction of the use of certain Hazardous Substances in electrical  
and electronic equipment (RoHS) directive issued by European Union (EU).  
SCSI standard  
The HDD 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 HDD. This allows software to accommodate future expansion of  
system functions.  
(4)  
8-bit SCSI/16-bit SCSI  
The HDD 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.  
14  
C141-E270  
(5)  
High speed data transfer  
Such a high data transfer rate on the SCSI bus can be useful with the large capacity buffer in the  
HDD.  
•
•
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.  
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.  
(6)  
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 the HDD can  
perform continuous read/write operation when processing data blocks on several tracks or cylinder.  
(7)  
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.  
(8)  
Cache feature  
After executing the READ command, the HDD 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.  
The write cache feature is supported. When this feature is enabled, the status report is issued without  
waiting for completion of write processing to disk media, thereby enabling high speed write  
processing.  
C141-E270  
15  
IMPORTANT  
When Write cache is enabled, you should ensure that the cached  
data is surely flushed to the disk media before you turn off the  
HDD's power.  
To ensure it, you should issue either the SYNCHRONIZE CACHE  
command or the STOP UNIT command with specifying “0” to the  
Immediate bit and then confirm that the command is surely  
terminated with the GOOD STATUS.  
(9)  
Command queuing feature  
The HDD can queue maximum 128 commands, and optimizes the issuing order of queued  
commands by the reordering function. This feature realizes the high speed processing.  
(10)  
Reserve and release functions  
The HDD can be accessed exclusively in the multi-host or multi-initiator environment by using  
the reserve and release functions.  
(11)  
Error recovery  
The HDD can try to recover from errors in SCSI bus or the HDD 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 HDD.  
(12)  
(13)  
Automatic alternate block reassignment  
If a defective data block is detected during read or write the HDD 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 HDD 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, and 528 bytes.  
3. The Recoverable Error referred in 2) is sense data (1-13-xx).  
16  
C141-E270  
(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.  
(15)  
(16)  
High speed positioning  
A rotary voice coil motor achieves fast positioning with high performance access control.  
Large capacity  
A large capacity can be obtained from the HDDs 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.  
(17)  
(18)  
Start/Stop of spindle motor  
Using the SCSI command, the host system can start and stop the spindle motor.  
Diagnosis  
The HDD has a diagnostic capability which checks internal controller functions and HDD  
operations. Also, for early detection of and recovery from the errors on the disk, the HDD has a  
function for periodically implementing a full scan of the disk.  
(19)  
Low power consumption  
By using highly integrated LSI components, the power consumption of the HDD is very low, and  
this enables the unit to be used in wide range of environmental conditions.  
(20)  
(21)  
Low acoustic noise  
The acoustic noise level is low; approx. 3.6 Bels at Idle. This makes it ideal for office use.  
Microcode downloading  
The HDD implements the microcode download feature. This feature achieves easy  
maintainability of the HDD and function enhancing.  
C141-E270  
17  
1.2  
Hardware Structure  
The HDDs have a disk enclosure (DE) and a printed circuit board assembly (PCBA). The DE  
includes the heads on an actuator and the disks on a spindle motor mounted on the DE. The  
PCBA includes a read/write circuit and a controller circuit.  
(1)  
Disks  
The disks have an outer diameter of 70 mm (2.8 inch).  
(2)  
(3)  
Heads  
The heads have MR (Magnet-Resistive) read element Ramp Load type slider.  
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.  
(4)  
(5)  
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 are controlled and positioned via feedback of  
servo information in the data.  
The heads are positioned on the ramp when the power is off or the spindle motor is stopped.  
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 MEEPRML (Modified Enhanced Extended Partial Response 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.  
18  
C141-E270  
1.3  
System Configuration  
Figure 1.1 shows the system configuration. The HDDs are connected to the SCSI bus of host  
systems and are always operated as target. The HDDs perform input/output operation as specified  
by SCSI devices which operate as initiator.  
SCSI bus  
HDD  
HDD  
(#14)  
(#15)  
Figure 1.1 System configuration  
C141-E270  
19  
(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 1.1). 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 HDD 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)  
20  
C141-E270  
CHAPTER 2  
SPECIFICATIONS  
2.1  
2.2  
Hardware Specifications  
SCSI Function Specifications  
This chapter describes specifications of the HDD 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  
Capacity  
(user area)  
Model name  
Order number  
SCSI type  
MBA3300NC  
MBA3300NP  
MBA3147NC  
MBA3147NP  
MBA3073NC  
MBA3073NP  
CA06708-B400  
CA06708-B850  
CA06708-B200  
CA06708-B650  
CA06708-B100  
CA06708-B550  
SCA2, LVD  
68-pin, LVD  
SCA2, LVD  
68-pin, LVD  
SCA2, LVD  
68-pin, LVD  
300 GB (*)  
147 GB (*)  
73.5 GB (*)  
(*) One gigabyte (GB) = one billion bytes; accessible capacity will be less and actual  
capacity depends on the operating environment and formatting.  
C141-E270  
21  
2.1.2  
Function specifications  
Table 2.2 shows the function specifications of the HDD.  
Table 2.2  
Function specifications  
Specification  
Item  
MBA3300NC  
MBA3300NP  
MBA3147NC  
MBA3147NP  
MBA3073NC  
MBA3073NP  
Format capacity (*1)  
Number of disks  
Number of heads  
Tracks per Surface  
Recording mode  
Areal density  
300 GB (*2)  
147 GB (*2)  
73.5 GB (*2)  
4
8
2
4
1
2
82,604 cyl typ. (standard format including the alternate cylinder)  
60/62 MEEPRML  
124.7 Gbit/inch2  
860 kBPI  
Maximum recording density  
Track density  
145 kTPI typ.  
Track to  
Track  
0.2 ms / 0.4 ms  
Seek time  
(Read/Write)  
(*3)  
Average  
Full stroke  
3.4 ms / 3.9 ms  
8.0 ms / 9.0 ms  
Number of rotations  
Average latency time  
15,000 ± 0.2 % min-1 (rpm)  
2.0 ms  
ready up time  
Stop time  
Height  
30 s typ. (60 s max.)  
30 s typ.  
Start/stop time (*4)  
26.1 mm max.  
External dimensions  
Width  
101.6 mm ± 0.25 mm  
147.0 mm max.  
Length  
Weight  
0.8 kg max.  
Power consumption (*5)  
13.06 W typ.  
Fast 5 SCSI  
Cable length: 6 m max.  
Cable length: 3 m max.  
Single  
ended  
Fast 10 SCSI  
Cable length: 3 m max. (*6)  
Cable length: 1.5 m max. (*7)  
Fast 20 SCSI  
Interface  
Ultra 2 Wide  
U160  
U320  
Cable length: 25 m max. (*8)  
Cable length: 12 m max. (*9)  
LVD  
Internal  
External  
188 MB/s (standard format, most outer)  
320 MB/s max.  
Data transfer rate (*10)  
Logical data block length  
512 to 528 byte (fixed length) (*11)  
22  
C141-E270  
Table 2.2  
Function specifications (continued)  
Specification  
Item  
MBA3300NC  
MBA3300NP  
MBA3147NC  
MBA3147NP  
MBA3073NC  
MBA3073NP  
SPI-4 (T10/1365D Rev. 10), SAM-2 (T10/1157D Rev. 24),  
SPC-2 (T10/1236D Rev. 20), SBC (T10/996D Rev. 8c)  
8 MB FIFO ring buffer (*12)  
Related standards  
Data buffer  
Acoustic noise (Idle)  
3.6 Bels typ.  
(*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)  
One gigabyte (GB) = one billion bytes; accessible capacity will be less and actual capacity  
depends on the operating environment and formatting.  
The seek time is as follows:  
Seek difference [4096 Cyl/div]  
(*4)  
The start time is the time from power on or start command to when the HDD 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)  
This value indicates during idle mode. Power supply at nominal voltage ± 1%. 25°C ambient.  
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.  
C141-E270  
23  
(*10)  
The maximum data transfer rate may be restricted to the response speed of initiator and by  
transmission characteristics. 1MB/s=1,000,000 bytes/s.  
(*11)  
(*12)  
Refer to 1.1(13).  
1MB=1,048,576 bytes  
24  
C141-E270  
2.1.3  
Environmental specifications  
Table 2.3 lists environmental and power requirements.  
Table 2.3  
Environmental/power requirements  
Specification  
Item  
MBA3300NC  
MBA3300NP  
MBA3147NC  
MBA3147NP  
MBA3073NC  
MBA3073NP  
Operating  
5 to 55°C  
–40 to 70°C  
Non-operating  
Temperature  
(*1)  
Transport  
–40 to 70°C  
DE surface temperature at operating  
Gradient  
5 to 60°C  
20°C/h or less  
5 to 95%RH  
Operating  
Non operating  
5 to 95%RH  
Relative  
humidity  
Transport  
5 to 95%RH  
Maximum wet bulb temperature  
Operating (*3)  
29°C (no condensation)  
0.6 mm (5 to 20 Hz)/9.8 m/s2 (1 G) (20 to 300 Hz) or less  
3.1 mm (5 to 20 Hz)/49m/s2 (5 G) (20 to 300 Hz) or less  
3.1 mm (5 to 20 Hz)/49m/s2 (5 G) (20 to 300 Hz) or less  
637.4 m/s2 (65 G)/2 ms duration  
Vibration  
(*2)  
Non-operating (*4)  
Transport (packaged)  
Operating  
Shock (*2)  
Altitude  
Non-operating  
2451.7 m/s2 (250 G)/2 ms duration  
2451.7 m/s2 (250 G)/2 ms duration  
Transport (packaged)  
Operating  
–305 to +3,048 m (-1,000 to +10,000 feet)  
Non-operating  
Regulation  
–305 to +12,192 m (-1,000 to +40,000 feet)  
± 5 %  
Ready (average)  
0.88 A  
0.60 A  
0.45 A  
2.5 A (peak)  
Power  
requirement +12V DC  
(*5)  
Spin up  
3.5 A (less than 100 μs)  
Peak operating current  
Maximum (peak) DC (*6)  
2.8 A  
2.5 A  
0.9 A  
2.3 A  
Peak operating current  
DC (reference) (*6)  
1.15 A  
0.75 A  
C141-E270  
25  
Table 2.3  
Environmental/power requirements (continued)  
Specification  
Item  
MBA3300NC  
MBA3300NP  
MBA3147NC  
MBA3147NP  
MBA3073NC  
MBA3073NP  
Regulation  
± 5 %  
0.5 A  
Ready (average)  
Peak operating current  
Maximum (peak) DC  
(*6)  
Power  
requirement  
(*5)  
+5V DC  
1.5 A  
Peak operating current  
DC (reference) (*6)  
0.79 A  
Ripple (+5 V, +12 V)  
250 mVp-p or less (*7)  
(*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)  
(*4)  
At random seek write/read and default on retry setting with log sweep vibration.  
At power-off state after installation  
Vibration displacement should be less than 2.5 mm.  
(*5)  
(*6)  
(*7)  
Input voltages are specified at the HDD connector side during HDD Idle state.  
Operating currents are values under random W/R operation of full partition at about 220 IOPS.  
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 equally.  
(1)  
(2)  
Unrecoverable error rate  
Errors which cannot be recovered within 63 retries and ECC correction should not exceed 10 per  
1016 bits read.  
Positioning error rate  
Positioning errors which can be recovered by one retry should be 10 or less per 108 seeks.  
26  
C141-E270  
2.1.5  
Reliability  
(1)  
Mean Time Between Failures (MTBF)  
MTBF of the HDDs during its lifetime is 1,400,000 hours (operating: 24 hours/day, 7 days/week  
average DE surface temperature: 50°C or less).  
Continual or sustained operation at case DE surface temperature above 50°C may degrade product  
reliability.  
Note:  
The MTBF is defined as:  
Operating time (hours) at all field sites  
MTBF=  
The number of equipment failures from all field sites  
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 an  
HDD 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 low as possible.  
•
•
•
•
•
•
DE surface temperature: from 5°C to 40°C  
DE surface temperature: from 41°C to 45°C  
DE surface temperature: from 46°C to 50°C  
DE surface temperature: from 51°C to 55°C  
DE surface temperature: from 56°C to 60°C  
DE surface temperature: more than 60°C, or less than 5°C No guarantee  
(Keep the DE surface  
temperature from 5°C to 60°C.)  
5 years  
4.5 years  
4 years  
3.5 years  
3 years  
Even if the HDD is used intermittently, the longest service life is 5 years.  
The maximum storage period without turning the power on is six months.  
C141-E270  
27  
Note:  
The "average DE surface temperature" means the average temperature at the DE surface  
throughout the year when the HDD 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.  
28  
C141-E270  
2.2  
SCSI Function Specifications  
Table 2.4 shows the SCSI functions provided with the HDD.  
Table 2.4  
SCSI function specifications  
Item  
Specification  
Single-ended type  
Ο
×
HVD type (High Voltage Differential)  
LVD type (Low Voltage Differential)  
Ο
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 (NP model)  
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, NP model)  
SCSI ID  
16-bit SCSI  
Addressing  
LUN (logical unit number)  
#0 fixed  
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)  
(Ultra 2 type)  
16-bit SCSI (Single-ended type)  
(Ultra 2 Wide type)  
Ο
Ο
Ο
Ο
Ο
Data transfer  
(Synchronous  
mode) (*2)  
(U160 LVD type)  
(U320 LVD type)  
Data buffer (*3)  
8 MB  
512 to 528 bytes  
(Fixed length)  
Data block length (Logical data length=Physical data length) (*4)  
Ο : Provided  
× : Not provided  
(*1)  
(*2)  
(*3)  
(*4)  
The driver mode (Single-ended or LVD) changes automatically by Diffsence signal level.  
1MB/s=1,000,000 bytes/s  
1MB=1,048,576 bytes  
Refer to (13) of Section 1.1.  
C141-E270  
29  
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  
HDD.  
3.1  
Data Space  
The HDD 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 HDD itself  
The user space allows a user access by specifying data. These spaces 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 HDD 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 HDD 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 each cell and the last 10 cylinders of the last zone are allocated as alternate  
areas according to the user's assignment (MODE SELECT command). See Subsection 3.1.2 for  
details.  
C141-E270  
31  
Note: Spare sectors on the last track in each cell 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 HDD intends to increase the storage capacity by  
dividing all cylinders into several zones and changing a recording density of each zone.  
32  
C141-E270  
(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 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.  
A number starting with 0 is assigned to each cylinder required in the user space in ascending  
order. If the number of cylinders does not reach the maximum, the rest of the cylinders will not be  
used.  
Always 10 cylinders are located at the end of the last zone in the user space as an alternate  
cylinder. Alternate cylinders will be used for alternate blocks. 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  
512 bytes. The Internal test space consists of 8 cylinders and outer-most cylinder is always  
assigned (Cylinder –223 to –230). 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 HDD 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 10 cylinders of the last zone in the user space.  
The spare area in each cell 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.  
C141-E270  
33  
The number of spare sectors per cell is fixed at 300. This number cannot be changed by users.  
Track 0  
Track 1  
Sector 0  
n
1
n-m-1  
n-m  
n-2  
n-1  
n+1  
2n-m-1  
2n-m  
2n-2  
2n-1  
Cell  
Last track  
SPR1  
SPR299 SPR300  
Spare sectors (300 sectors)  
Note: This HDD manages alternate spare areas for each cell, which is a set of cylinders. One  
cell consists of 32 to 40 cylinders.  
Figure 3.2 Spare area in cell  
The alternate cylinder is used for replacement action via the REASSIGN BLOCKS command or  
automatic replacement processing. The alternate cylinder is allocated to 10 cylinders at the end of  
the last zone in the user space.  
The user space and the system space share the alternate cylinders.  
Note: The number of alternate cylinders cannot be changed.  
Figure 3.3 Alternate cylinder  
34  
C141-E270  
3.1.3  
Track format  
(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 the HDD internal free  
running clock 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.  
Servo frame  
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 cylinder switching location in a head, 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 head switching location, like the cylinder switching location, the first logical data block in  
the last cylinder of the head is allocated at the sector position which locates the head skew behind  
the last logical sector position in the first cylinder of the preceding head.  
C141-E270  
35  
Track skew  
Head  
Track skew  
Head 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 HDD automatically determines appropriate values  
for the track skew factor and the head skew factor according to the specified logical data block  
length.  
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:  
36  
C141-E270  
(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 400 bits code that allows detection and correction of errors in the data field, which is  
capable of correcting the single burst error up to 200 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.  
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37  
3.1.5  
Format capacity  
The size of the usable area for storing user data on the HDD (format capacity) varies according to  
the logical data block or the size of the spare sector area. Table 3.1 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 is 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.  
Table 3.1  
Format capacity  
Model  
Data block length  
User blocks  
585,937,500  
Format capacity  
300 GB (*)  
MBA3300NC,  
MBA3300NP  
MBA3147NC,  
MBA3147NP  
287,277,984  
143,638,992  
147 GB (*)  
73.5 GB (*)  
512  
MBA3073NC,  
MBA3073NP  
(*) One gigabyte (GB) = one billion bytes; accessible capacity will be less and  
actual capacity depends on the operating environment and formatting.  
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  
The HDD relates a logical data block address to each physical sector at formatting. Data on the  
disk is accessed in logical data block units. The initiator specifies the data to be accessed using  
the logical data block address of that data.  
38  
C141-E270  
(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 HDD treats sector 0, head 0, and 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 in ascending order of cylinder number in the same  
head. Within the same head, 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 head number in the same cell. Within the same track, logical data blocks  
are assigned in the same way as step 1) and 2).  
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 the HDD 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.  
C141-E270  
39  
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 HDD 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 initiator 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 initiator at the initialization of the disk. This information is  
recorded in the system space of the HDD 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 initiator, information on  
defective logical data blocks assigned alternate blocks by means of HDD automatic alternate  
block allocation, and information specified as the D list. They are recorded in the system  
space on the HDD.  
The initiator 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 HDD. The initiator 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 "alternate cylinders". See  
Subsection 3.1.2 for details.  
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 alternate cylinder.  
40  
C141-E270  
The alternate block allocation is executed by the FORMAT UNIT command, the REASSIGN  
BLOCKS command, or the automatic alternate block allocation. Refer to Subsection 5.3.2 “Auto  
alternate block allocation processing” of the SCSI Logical Interface 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 HDD 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 defect list (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 defective sectors that follows the sector by means of alternate sector treatment.  
Figure 3.7 is examples of the alternate block allocation during the FORMAT UNIT command  
execution.  
C141-E270  
41  
: n represents a logical data block number  
: Defective sector  
: Unused spare sector  
Figure 3.7 Alternate block allocation by FORMAT UNIT command  
During FORMAT UNIT command, alternate block allocation is conducted in following cases:  
1) Unrecovered write offtrack condition during a media write  
2) Uncorrectable Data Error during a media read (certification) *1  
If above errors are detected during FORMAT UNIT command, the HDD allocates the alternate  
block(s) to the defective data blocks. Reassign procedure itself is the same as one in REASSIGN  
BLOCKS command.  
*1. Certification is permitted when DCRT flag is cleared (DCRT flag=0) in FORMAT UNIT  
command.  
The HDD checks all initialized logical data blocks by reading them out after the above  
alternate block allocation is made to initialize (format) the disk.  
42  
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(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. The  
alternate block is allocated to unused spare sectors in the alternate cylinder.  
Figure 3.8 is examples of the alternate block allocation by the REASSIGN BLOCKS command.  
Example Reassign: Block 16.  
: 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 HDD 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).  
C141-E270  
43  
•
Automatic alternate block allocation at write operation  
If AWRE flag in the MODE SELECT parameter permits the automatic alternate block allocation,  
the HDD executes two kinds of automatic alternate processing during WRITE command  
processing as described below:  
Type 1 (Reassignment of uncorrectable read error sector)  
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 data 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.  
Type 2 (Reassignment t of write fail sector)  
1) Commands to be applied  
-
-
-
-
WRITE  
WRITE EXTENDED  
FORMAT UNIT  
WRITE at executing WRITE AND VERIFY  
44  
C141-E270  
2) Application requirements / processing  
When WRITE/WRITE EXTENDED command detects any Servo error (e.g. Write offtrack  
error) and cannot be recovered within pre-determined retry number (specified in Mode  
Parameter). For the sectors around defective Servo, alternate blocks are allocated and the data  
of this WRITE commands are re-written.  
Sectors to be made AWRE shall be following:  
-
-
-
-
the sector where the error occurs and the latter sectors and,  
the sectors whose data are logically continual and stored in Cache,  
the sectors which will be processed in this Write command and,  
the sectors which locate between erroneous Servo −1 and +1 (including Split sector)  
This function is also applied for the sector that has already been re-assigned.  
Remark:  
When a write protection is prohibited through the setting terminal, the auto alternate  
block allocation processing specification is disabled.  
IMPORTANT  
Automatic alternate block allocation is made up to the following  
quantities during the execution of one command:  
ARRE = Twice  
AWRE (Type 1) = 16 times  
AWRE (Type 2) =Maximum number which can be processed  
within the recovery time limit  
If more than the above mentioned 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.  
C141-E270  
45  
This page is intentionally left blank.  
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 HDD and the locations of the holes for  
the HDD mounting screws.  
C141-E270  
47  
The value marked with (*) indicates the dimension between mounting holes on the bottom  
face.  
[Unit: mm]  
Figure 4.1 NC model dimensions  
48  
C141-E270  
The value marked with (*) indicates the dimension between mounting holes on the bottom  
face.  
[Unit: mm]  
Figure 4.2 NP model dimensions  
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49  
4.1.2  
Mounting orientations  
As shown in Figure 4.3, the HDD can be installed flat on any of its six sides. Inclination from a  
vertical or horizontal plane should not exceed 5°.  
(a) Horizontal –1  
(b) Horizontal –2  
(c) Vertical –1  
(d) Vertical –2  
(e) Upright mounting –1  
(f) Upright mounting –2  
Direction of  
gravity  
Figure 4.3 HDD orientations  
4.1.3  
Notes on mounting  
CAUTION  
Damage  
Never remove any labels from the HDD or deface them in any way.  
50  
C141-E270  
(1)  
(2)  
Mounting screw  
Use No.6-32UNC.  
Mounting frame structure  
Special attention must be given to mount the HDD as follows.  
a) Use the frame with an embossed structure, or the like. Mount the HDD with making a  
gap of 2.5 mm or more between the HDD and the frame of the system.  
b) As shown in Figure 4.4, the inward projection of the screw from the HDD frame wall at  
the corner must be 4.5 mm ± 0.8 mm.  
c) Tightening torque of screw must be secured with 0.59N·m (6kgf·cm) ±12%.  
d) Impact caused by the electric screwdriver must be within the HDD specifications.  
e) Must be handled on an anti-static mat.  
Figure 4.4 Mounting frame structure  
(3)  
Limitation of side-mounting  
Use the four 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 two holes on both ends.  
(Total six screws for six holes enclosed)  
C141-E270  
51  
4
Holes for  
mounting screw  
3
In case of using a  
2
center hole, use it in  
combination with the  
holes of both ends.  
1
Holes for mounting screw  
Use four holes (No.1 to No.4) to mount.  
Figure 4.5 Limitation of side-mounting  
(4)  
(5)  
Limitation of bottom-mounting  
Use all four mounting holes on the bottom face.  
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 never exceed 60°C.  
Cool the PCBA side especially with air circulation inside the cabinet. Confirm the cooling  
effect by measuring the surface temperature of specific ICs and the DE. These measurement  
results must satisfy the temperature condition listed in Table 4.1.  
•
Keep the DE surface temperature at 50 °C or below to meet the condition for assuring an  
MTBF of 1,400,000 hours. An air flow of 0.9 m/s or more is required at ambient temperature  
30 °C.  
Table 4.1  
Surface temperature check point  
Max. temperature on  
No.  
Measurement point  
package  
1
2
3
4
5
DE surface  
Read channel LSI  
VCM/SPM Driver  
HDC  
60 °C  
82 °C  
100 °C  
100 °C  
94 °C  
MPU  
52  
C141-E270  
2
5
1
3
4
Figure 4.6 Surface temperature measurement points  
(6)  
(7)  
External magnetic field  
Do not install the HDDs in the vicinity of equipment giving off strong magnetic fields, such as  
monitors, televisions, or loudspeakers.  
Leak magnetic flux  
Do not mount the HDDs near the devices that the leakage magnetic flux influence easily.  
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 HDD  
(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 4.7 shows the spin-up current waveform of +5V DC and +12V DC.  
C141-E270  
53  
+5VDC  
MBA3300NC  
MBA3300NP  
MBA3147NC  
MBA3147NP  
MBA3073NC  
MBA3073NP  
Time (2 sec/div)  
Time (2 sec/div)  
Time (2 sec/div)  
+12VDC  
MBA3300NC  
MBA3300NP  
MBA3147NC  
MBA3147NP  
MBA3073NC  
MBA3073NP  
Time (2 sec/div)  
Time (2 sec/div)  
Time (2 sec/div)  
Figure 4.7 Current waveform (Spin-up)  
54  
C141-E270  
Figure 4.8 shows the max seek current waveform of +5V DC and +12V DC.  
+5VDC  
MBA3147NC  
MBA3147NP  
MBA3300NC  
MBA3300NP  
MBA3073NC  
MBA3073NP  
Time (10 msec/div)  
Time (10 msec/div)  
Time (10 msec/div)  
+12VDC  
MBA3300NC  
MBA3300NP  
MBA3147NC  
MBA3147NP  
MBA3073NC  
MBA3073NP  
Time (10 msec/div)  
Time (10 msec/div)  
Time (10 msec/div)  
Figure 4.8 Current waveform (Max seek)  
(3)  
Power on/off sequence  
a) The order of the power on/off sequence of +5V DC and +12V DC, supplied to the HDD, does  
not matter.  
b) In a system which uses the terminating resistor power supply signal (TERMPWR) on the  
SCSI bus, the requirements for +5V DC given in Figure 4.9 must be satisfied between the  
HDD and at least one of the SCSI devices supplying power to that signal.  
Figure 4.9 Power on/off sequence (1)  
C141-E270  
55  
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  
HDD 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 HDD 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 HDD.  
SCSI devices  
without noise  
leaking designed  
Figure 4.11 Power on/off sequence (3)  
56  
C141-E270  
(4)  
Sequential starting of spindle motors  
After power is turned on to the HDD, a large amount of current flows in the +12 VDC line when  
the spindle motor rotation starts. Therefore, if more than one HDD 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 Subsection 3.1.10 “START/STOP UNIT  
(1B)” of the SCSI Logical Interface Specifications.  
b) Turn on the +12V DC power in the power supply unit at 12-second intervals or more 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 HDD to other SCSI devices through the  
SCSI bus, the current-carrying capacity of the +5 VDC power supply line to the HDD 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  
HDD (NP model only). See Subsection 5.3.2 for this selection.  
For the electrical condition of supplying power to the terminating resistor, refer to Section 1.4  
“Electrical Requirements” of the 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 HDD  
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.  
C141-E270  
57  
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  
58  
C141-E270  
(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  
“Physical Requirements” and Section 1.4 “Electrical Requirements” of the 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.  
C141-E270  
59  
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 panel  
connector (CN1)  
SCSI 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  
“Physical Requirements” and Section 1.4 “Electrical Requirements” of the SCSI Physical  
Interface Specifications.  
60  
C141-E270  
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.  
4
3
2
1
Figure 4.17 Power supply connector (68-pin type 16-bit SCSI)  
SG terminal  
(3)  
The HDD 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 HDD 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.  
C141-E270  
61  
Pin  
A1  
Signal  
–ID0  
A2  
Fault LED  
–ID1  
A3  
A4  
ESID  
A5  
–ID2  
A6  
(Reserved)  
–ID3  
A7  
A8  
–LED  
N.C  
A9  
A10  
A11  
A12  
GND  
+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)  
62  
C141-E270  
(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 HDD 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  
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63  
b. Fault LED: Output signal (CN1-A2 pin)  
The HDD 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.  
(HDD)  
74LS06 or equivalent  
150 Ω  
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 HDD 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 HDD 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  
HDD. The LED blinks during command execution.  
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  
HDD has been switched on (it is possible to set up the SCSI ID by short  
circuiting CN1-A7 and CN1-A8.)  
64  
C141-E270  
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 HDD  
disk media are set to disable.  
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65  
(6)  
Cable connection requirements  
The requirements for cable connection between the HDD, 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  
66  
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4.3.3  
Cable connector requirements  
Table 4.2 lists the recommended components cable connection.  
Table 4.2 Recommended components for connection  
Applicable  
model  
Part number  
(Size)  
Reference  
(*1)  
Type  
Name  
Manufacturer  
Tyco Electronics  
AMP  
787311-4  
SCSI connector  
(CN1)  
NC  
Connector  
71743-1085  
Molex  
DHJ-PAC68-2AN-  
FG  
Fujikura  
Cable socket  
(closed-end type)  
Tyco Electronics  
AMP  
SCSI cable (CN1)  
S1  
5786090-7  
UL20528-FRX-  
68-P0.635  
Signal cable  
Fujikura  
Tyco Electronics  
AMP  
Cable socket housing 1-480424-0  
Power supply  
cable (CN1)  
S2  
S3  
S4  
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  
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  
Refer to Section 1.3 “Physical Requirements” and Section 1.4 “Electrical Requirements” of the  
SCSI Physical Interface Specifications.  
Power cable  
HDDs 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 HDD because no fasten tab dedicated to SG is  
provided with the HDD. 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.  
C141-E270  
67  
(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 HDD:  
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.  
(HDD)  
S3  
A1  
-ID0  
-ID1  
-ID2  
-ID3  
ID0  
ID1  
ID2  
ID3  
C
N
1
A3  
A5  
A7  
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  
68  
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IMPORTANT  
Do not connect the external LED to both CN1 and CN2. Connect it  
to either of them.  
C141-E270  
69  
This page is intentionally left blank.  
CHAPTER 5  
INSTALLATION  
5.1  
5.2  
5.3  
5.4  
5.5  
5.6  
Notes on Handling HDDs  
Connections  
Setting Terminals  
Mounting HDDs  
Connecting Cables  
Checking Operation after Installation and Preparing  
the HDDs for Use  
5.7  
Dismounting HDDs  
This chapter describes the notes on handling HDDs, connections, setting switches and plugs, mounting  
HDDs, connecting cables, confirming drive operations after installation and preparation for use, and  
dismounting HDDs.  
5.1  
Notes on Handling HDDs  
The items listed in the specifications in Table 2.1 must be strictly observed.  
(1)  
General notes  
a) Do not give the HDD shocks or vibrations exceeding the value defined in the specifications  
because it may cause critical damage to the HDD. Especially be careful when unpacking.  
b) Do not leave the HDD in a dirty or contaminated environment.  
c) Since static discharge may destroy the CMOS semiconductors in the HDD, note the following  
after unpacking:  
•
•
Use an antistatic mat and body grounding when handling the HDD.  
Hold the DE when handling the HDD. Do not touch any components on the PCBAs  
except setting terminal (CN1 and CN2).  
CAUTION  
High temperature  
To prevent injury, never touch the HDD while it is hot. The DE and LSI  
become hot during operation and remain hot immediately after turning off the  
power.  
C141-E270  
71  
(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 PCBA and interface connector when removing  
the HDD from the Fcell (See Figure 6.2).  
d) Never remove any labels from the HDD. Never open the DE for any reason.  
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 HDD when power is turned on or until the HDD 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 HDD in an antistatic case (Fcell).  
b) It is recommended to use the same cushions and packages as those at delivery (for details, see  
Section 6.5). If those at delivery cannot be used, use a package with shock absorption so that  
the HDD is free from direct shocks. In this case, fully protect the PCBAs and interface  
connector so that they are not damaged.  
(5)  
Delivery  
a) When delivering the HDD, 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.  
(6)  
Storage  
a) Provide moistureproof packaging for storage.  
b) The storage environment must satisfy the requirements specified in Subsection 2.1.3 when the  
HDD is not operating.  
c) To prevent condensation, avoid sudden changes in temperature.  
72  
C141-E270  
5.2  
Connections  
Figure 5.1 shows examples of connection modes between the host system and the HDD. For the  
16-bit SCSI, up to 16 devices including the host adapter, HDD, 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 4.3 for the cable connection requirements and power cable connections.  
Connecting one HDD  
(1)  
HDD  
C141-E270  
73  
(2)  
Connecting more than one HDD (single host)  
HDD  
HDD  
Figure 5.1 SCSI bus connections (1 of 2)  
(3)  
Connecting more than one HDD (multi-host)  
HDD  
HDD  
: SCSI terminator  
Figure 5.1 SCSI bus connections (2 of 2)  
74  
C141-E270  
5.3  
Setting Terminals  
A user sets up the following terminals and SCSI terminating resistor before installing the HDD in  
the system as required.  
•
Setting terminal: CN1 (NC model), CN2 (NP model)  
Figure 5.2 shows the location of the setting terminal for NP model, and Figure 5.3 shows the  
allocation and the default settings for NP model. See Figure 4.13 and Table B for NC model  
because the setting terminal is included in SCSI connector (CN1).  
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: Pin pair 9/10 of the CN2 setting terminal (NP model only)  
3. To short the setting terminal, use the short plug attached when the device  
is shipped from the factory.  
Pin 24  
Pin 2  
CN2  
Pin 23  
Pin 1  
Figure 5.2 Setting terminals location (on NP models only)  
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75  
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)  
(HDD 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.  
76  
C141-E270  
Table 5.1  
NC model (CN1)  
SCSI ID setting  
NP model (CN2)  
SCSI  
ID  
Pin pair  
Pin pair  
3/4  
Pin pair Pin pair  
5/6  
Pin 39  
Pin 79  
Pin 40  
Pin 80  
1/2  
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  
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77  
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  
HDD  
Pin pair 23/24 of CN2  
(TRMPOW/TRMPOW)  
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 HDD 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  
Pin pair 11/12 of  
CN2  
(GND/RMSTART)  
Pin 38 of CN1  
(RMT START)  
Pin 78 of CN1  
(DYLD START)  
Starting of the motor is controlled  
with the START/STOP UNIT  
command.  
Short  
Open  
Open or Short  
Open  
The motor is started immediately  
after the power supply is turned on or  
after the microcode is downloaded.  
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.  
Open  
(*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 Subsection 3.1.10 “START/STOP UNIT (1B)” of the SCSI Logical Interface  
Specifications for details of the START/STOP UNIT command.  
78  
C141-E270  
(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)  
Pin pair 9/10 of CN2  
Write protect  
(GND/WTP)  
Open (*1)  
Short  
Write operation is enabled.  
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  
HDD automatically identifies the DIFFSNS signal level on the SCSI bus and the HDD SCSI  
interface operation mode is set to the operation mode.  
Table 5.5  
Setting of the SCSI interface operation mode (NP model)  
Pin pair 15/16 of CN2  
Operation mode  
(GND/DIFFSENS)  
Follows the DIFFSNS signal level on the SCSI bus  
Single-Ended mode  
Open (*1)  
Short  
*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 HDD only  
when the top-level bus (DB8-15, P1) for the HDD SCSI interface is not connected to the external  
part of the HDD.  
Table 5.6  
Setting the bus width of the SCSI interface (NP model)  
Pin pair 13/14 of CN2  
Bus width  
(GND/8/16 SW)  
16-bit bus  
8-bit bus  
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-E270  
79  
5.3.3  
Mode settings  
In addition to the previously described settings using setting terminals, the HDD 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 Subsection 3.1.4 “CHANGE DEFINITION (40)” of the SCSI Logical Interface  
Specifications for details of the CHANGE DEFINITION command.  
Table 5.7  
Default mode settings (by CHANGE DEFINITION command)  
Mode setting  
Contents  
SCSI-3  
SCSI level  
SYNCHRONOUS DATA TRANSFER REQUEST message  
sending  
Not sent from HDD  
UNIT ATTENTION report mode  
Reselection retry count  
Reported  
Not restricted  
Not sent from HDD  
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  
80  
C141-E270  
5.4  
Mounting HDDs  
5.4.1  
Check before mounting  
Reconfirm if the CN2 setting terminal is set correctly according to Table 5.8 before mounting the  
NP model drives in the system cabinet. For the CN2 setting terminal 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 contents  
(Check item)  
Pin pair on CN2  
Check  
No.  
1
Remarks  
SCSI ID  
1/2  
3/4  
ꢀ (SCSI ID = __) Upper bus  
(DB 8 to 15 PI)  
not connected  
5/6  
7/8  
2
3
4
5
6
Write protect  
9/10  
11/12  
13/14  
15/16  
23/24  
ꢀ Short ꢀ Open  
ꢀ Short ꢀ Open  
ꢀ Short ꢀ Open  
ꢀ Short ꢀ Open  
ꢀ Short ꢀ Open  
Motor start mode  
Force Narrow  
Force single ended  
Terminator power supply  
5.4.2  
Mounting procedures  
Since mounting the HDD 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 Section 4.1 for the details of requirements for installing the HDD.  
1) With a system to which an external operator panel is mounted, if it is difficult to access the  
connector after the HDD is mounted on the system cabinet, connect the external operator  
panel cable before mounting the HDD.  
2) Fix the HDD in the system cabinet with four mounting screws as follows:  
•
•
•
The HDD has 10 mounting holes (both sides: 3 × 2, bottom: 4). Fix the HDD by using  
four mounting holes of both sides of the HDD or the bottom. (See Figure 4.5)  
Use mounting screws of which lengths inside the HDD are 5.0 mm ± 0.5 mm when the  
screws are tightened (see Figure 4.4).  
When mounting the HDD, be careful not to damage parts on the PCBA.  
3) Confirm the DE is not touching the frame on the system side excluding the screw installing  
part 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 using an electric screwdriver, use an electric screwdriver that does not apply a force on  
the HDD that would exceed the HDD specifications.  
C141-E270  
81  
5.5  
Connecting Cables  
Connect the HDD and system with the following cables. See Section 4.3 for further details of the  
requirements for HDD 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.  
82  
C141-E270  
5.6  
Checking Operation after Installation and Preparing the HDDs 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 HDD 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 HDD 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 HDD status is idle, the LED remains off (when the initiator accesses the HDD 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 HDD 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 initiator 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 HDD 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 HDD 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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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 HDD 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 HDD 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 d) correspond to a) to d) in Figures 5.4 and 5.5.  
a) Issue the TEST UNIT READY command and check that the HDD 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 HDD 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  
d
(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)  
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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 "Sense Data Error  
Recovery Methods" of the 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 HDD 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 in the user space  
This section outlines the formatting at installation. Refer to Subsection 3.1.5 "MODE SELECT  
(15) ", 3.1.6 "MODE SELECT EXTENDED (55) ", 3.3.1 "FORMAT UNIT (04) ", and Chapter 6  
"Disk Media Management" of the 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  
currently set value is used.  
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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 (cannot  
be changed).  
(2)  
FORMAT UNIT command  
Initialize entire recording surface of the disk with the FORMAT UNIT command. The FORMAT  
UNIT command initializes entire 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 pattern specified with the initialization data pattern field 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 HDD to operate by  
using the parameter value set by the user when power is turned on again. When the system has  
more than one initiator, different parameter value can be set for each initiator.  
When the parameters are not set or saved with the MODE SELECT or MODE SELECT  
EXTENDED command, the HDD sets the default values for parameters and operates when power  
is turned on or after reset. Although the HDD 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 Subsection 3.1.5 "MODE  
SELECT (15) " and 3.1.6 "MODE SELECT EXTENDED (55)"of the 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 HDD, the saving operation for the MODE  
SELECT parameter is not executed. So, if the user does not set  
parameters, the HDD operates according to the default value of each  
parameter  
2. The MODE SELECT parameter is not saved for each SCSI ID of but as  
the common parameter for all IDs. In the multi-initiator system,  
parameter setting cannot be changed for each initiator.  
3. Once parameters are saved, the saved value is effective as long as next  
saving operation is executed from the initiator. 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 HDD, to which the saving operation has been executed on a  
system, is connected to another system, the user must pay attention to  
that the HDD operates according to the saved parameter value if the  
saving operation is not executed at installation.  
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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 initiator 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 HDD 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 initiator  
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 "Data Buffer Management" of the 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 "Data Buffer Management" of the 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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(3)  
Caching parameters (page code = 8)  
The following parameters are used to optimize HDD Read-Ahead caching operations under the  
system environments. Refer to Chapter 2 "Data Buffer Management" of the SCSI Logical  
Interface Specifications for further details.  
Parameter  
Initiator control  
Default value  
• IC:  
0 (HDD-specific  
control (page  
cache))  
• RCD:  
• WCE:  
• MF:  
Disabling Read-Ahead caching operations  
Write Cache Enable  
0 (enabled)  
1 (enabled)  
Specifying the multipliers of "MINIMUM  
PRE-FETCH" and "MAXIMUM PRE-  
FETCH" parameters  
0 (Specifying  
absolute value)  
• DISC:  
Prefetch operation after track switching during  
prefetching  
1 (enable)  
• DISABLE PRE-FETCH TRANSFER LENGTH  
• MINIMUM PRE-FETCH  
X'FFFF'  
X'0000'  
X' 0000'  
X'FFFF'  
X'08'  
• MAXIMUM PRE-FETCH  
• MAXIMUM PRE-FETCH CEILING  
• NUMBER OF CACHE SEGMENTS  
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 (page code = A)  
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)  
5.7  
Dismounting HDDs  
Since the method and procedure for dismounting the HDD, etc. depends on the locker structure of  
the system, etc., 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 HDD to make sure the spindle motor completely stops  
after power was turned off.  
CAUTION  
High temperature  
To prevent injury, never touch the HDD while it is hot. The DE and LSI  
become hot during operation and remain hot immediately after turning off the  
power.  
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 HDD, then remove the HDD from the system  
cabinet.  
f) When storing or transporting the HDD, put it the antistatic case (Fcell) (see Section 5.1 and  
6.5).  
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CHAPTER 6  
DIAGNOSTICS AND MAINTENANCE  
6.1  
6.2  
6.3  
6.4  
6.5  
Diagnostics  
Maintenance  
Operation Check  
Troubleshooting  
Packaging  
This chapter describes diagnostics and maintenance.  
6.1  
Diagnostics  
6.1.1  
Self-diagnostics  
The HDD has the following self-diagnostic function. This function checks the basic operations of  
the HDD.  
•
•
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 HDD 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 (ROM)  
Data buffer  
b. Seek test  
This test checks the positioning operation of the HDD using several seek modes (2 points  
seek, 1 position sequential seek, etc.). The positioning operation is regarded as success when  
the seek operation to the target cylinder is completed.  
c. Write/read test  
This test checks the write/read function by using the Internal test space of the HDD.  
(1)  
Initial self-diagnostics  
When power is turned on, the HDD 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 HDD blinks (at 0.4-second  
intervals). In this status, the HDD 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 initiator 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 HDD executes the initial self-diagnosis again.  
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The HDD does not reply to the SCSI bus for up to 2 seconds after the initial self-diagnostics is  
started. After that, the HDD 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  
HDD 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 HDD 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 “Command Queuing  
Function” and Subsection 1.7.4 “Command processing in the not ready state” of the SCSI Logical  
Interface Specifications.  
(2)  
Online self-diagnostics (SEND DIAGNOSTIC command)  
The initiator can make the HDD execute self-diagnostics by issuing the SEND DIAGNOSTIC  
command.  
The initiator 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 HDD executes the hardware function test only  
once. When UnitOfl bit is set to 1, the HDD 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 HDD performs the error  
recovery according to the MODE SELECT parameter value (read/write error recovery  
parameter, additional error recovery parameter) which the initiator 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.  
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b. Reporting result of self-diagnostics and error indication  
When all specified self-diagnostics terminate normally, the HDD posts the GOOD status for  
the SEND DIAGNOSTIC command.  
When an error is detected in the self-diagnostics, the HDD terminates the SEND  
DIAGNOSTIC command with the CHECK CONDITION status.  
The initiator 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 HDD 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 is issued from  
the same initiator, the error information (sense data) is cleared.  
b) When an error is detected in the hardware function test, the HDD 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 HDD executes the initial self-diagnostics again (see item (1)).  
Refer to Subsection 3.4.1 “SEND DIAGNOSTIC (1D)” of the 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 initiator 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 HDD 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 HDD functions  
generally.  
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(1)  
(2)  
(3)  
(4)  
6.2  
Interface test  
The operations of the SCSI bus and data buffer on the HDD are checked with the WRITE  
BUFFER and READ BUFFER commands.  
Basic operation test  
The basic operations of the HDD 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.  
Maintenance  
See Section 5.1 and 6.5 for notes on packaging and handling when returning the HDD.  
CAUTION  
Data loss  
Save data stored on the HDD to other media before requesting  
repair. Fujitsu does not assume responsibility if data is corrupted  
during servicing or repair.  
6.2.1  
Precautions  
Take the following precautions to prevent injury during maintenance and troubleshooting:  
CAUTION  
High temperature  
To prevent injury, never touch the HDD while it is hot. The DE and  
LSI become hot during operation and remain hot immediately after  
turning off the power.  
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99  
Electrical shock  
-
To avoid shocks, turn off the power before connecting or disconnecting a  
cable, connector, or plug.  
-
Never touch the HDDs while power-feeding.  
Take the following precautions to prevent disk drive damage during maintenance and  
troubleshooting:  
CAUTION  
Damage  
-
Always ground yourself with a wrist strap connected to ground before  
handling. ESD (Electrostatics Discharge) may cause the damage to the  
device.  
-
To prevent electrical damage to the HDD, turn the power off before  
connecting or disconnecting a cable, connector, or plug.  
-
-
-
Never remove a PCBA.  
Never use a conductive cleaner to clean the HDDs.  
Ribbon cables are marked with a colored line. Connect the ribbon cable to a  
cable connector with the colored wire connected to pin 1.  
-
Never open the HDD for any reason.  
6.2.2  
Maintenance requirements  
Preventive maintenance  
(1)  
Preventive maintenance is not required.  
(2)  
(3)  
Service life  
See "(3) Service life," in Section 2.1.5.  
Parts that can be replaced in the field  
The PCBA cannot be replaced in the field. The DE cannot be replaced in the field.  
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(4)  
Service system and repairs  
Fujitsu has the service system and repair facility for the HDD. Contact Fujitsu representative to  
submit information for replacing or repairing the HDD. Generally, the following information  
must be included:  
a) HDD 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  
See Section 5.1 for notes on packing and handling when returning the disk drive.  
6.2.3  
Maintenance levels  
If an HDD is faulty, replace the whole HDD since repair requires special tools and environment.  
This section explains the two maintenance levels.  
(1)  
Field maintenance (HDD 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.  
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101  
6.2.4  
6.2.5  
Tools and test equipment  
HDD 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 HDD 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 6.1 shows the flow of these tests.  
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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  
HDD  
No  
Test results OK?  
No  
HDD 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 HDD error  
(Table 6.3)  
Test results OK?  
Yes  
Normal  
Figure 6.1 Test flowchart  
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103  
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 spindle motor of the HDD stops, and then the HDD becomes 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 HDD monitors HDD operation including data  
processing, command processing, and seek operations. If the HDD detects an error, the HDD  
posts the error to the initiator. The initiator 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. The user can replace the HDD to see  
whether the error was caused by the HDD.  
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 HDD, an interrupt occurs.  
The interrupt is posted to the MPU on the PCBA. The MPU stops the currently processed  
command, and causes the CHECK CONDITION status to post the error to the initiator.  
When receiving the CHECK CONDITION status, the initiator issues a REQUEST SENSE  
command to collect detailed information about the error. The initiator then issues a REZERO  
UNIT command to return the read/write head to track 00. In normal processing, the HDD itself or  
initiator 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 HDD.  
6.3.3  
Diagnostic test  
The diagnostic test is executed to find a faulty subassembly in a faulty HDD, or to check HDD  
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 HDD.  
The procedures to be used in this test depend largely on the type of test equipment used, and are  
not covered by this manual.  
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6.4  
Troubleshooting  
6.4.1  
Outline of troubleshooting procedures  
This section explains the troubleshooting procedures for HDD errors.  
Depending on the maintenance level, analyze the error to detect a possibly faulty part (HDD, or  
HDD 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 DE or burning of the PCBA), troubleshooting is straightforward.  
6.4.2  
Troubleshooting with HDD replacement in the field  
At this level of maintenance, we recommend replacing the HDD as a unit. If replacing the HDD  
rectifies the fault, return the removed HDD to Fujitsu, for test and repair. If the newly installed  
HDD 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 (HDD or system).  
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105  
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 +5V DC supply is from 4.75 to 5.25V DC.  
For NC model, check the voltage between pin 36 and 76 of the SCSI  
connector.  
For NP model, check the voltage between pin 3 and 4 of the power  
connector.  
Check that +12V DC supply is from 11.4 to 12.6V DC.  
For NC model, check the voltage between pin 1 and 2 of the SCSI  
connector.  
For NP model, check the voltage between pin 1 and 2 of the power  
connector.  
Electrical noise  
Make sure the maximum ripple peak-to-peak value of +5V DC is within  
250 mV and +12V DC 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 PCBA 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 HDD.  
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 HDD. If replacing the HDD does not eliminate the  
error, the removed HDD is probably not faulty. To continue error  
analysis, refer to the hardware and software manuals supplied with the  
system.  
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6.4.3  
Troubleshooting at the repair site  
For maintenance at this level, we recommend additional testing of the HDD and signal checking.  
The sense data posted from the HDD 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 HDD subassembly. This fault finding requires a working  
host computer or HDD test equipment to recreate the error conditions.  
If the detected error cannot be recreated in an ordinary test, HDD conditions can be changed to  
force the error to recur. This is done by changing the DC voltage or the ambient temperature of  
the HDD.  
If the error does not recur with changed conditions, the HDD is not faulty. If no error occurs in  
the HDD test, notify the user of the test results, and find out from the user the environment  
conditions where the HDD is used.  
Table 6.3  
HDD troubleshooting  
Recommended action  
Item  
Frequent or repeated seek errors  
Collect sense data, and see Chapter 7.  
Replace the HDD, and check that the test method is correct. If the  
error recurs, it is likely that the HDD is normal but the test method is  
incorrect.  
Intermittent or nonfatal errors  
Replace the HDD, and check that the test method is correct. If the  
error recurs, it is likely that the HDD is normal but the test method is  
incorrect.  
To check performance, change the HDD conditions by changing the  
voltage or temperature.  
If the HDD error recurs or a possibly faulty part is found by troubleshooting, return the complete  
HDD to Fujitsu for repair. A media defect list must be included with the HDD returned to Fujitsu.  
If the possibly faulty part is the HDD, return the whole HDD to Fujitsu for repair. Also if a clear  
error (erroneous servo track information or noisy HDD) is detected in the DE, return the whole  
HDD to Fujitsu. A media defect list must be included with the HDD returned to Fujitsu.  
CAUTION  
Damage  
-
Never remove any labels from the HDD or deface them in any  
way.  
-
Never open the DE for any reson. Doing so will void any  
warranties.  
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107  
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.  
6.5  
Packaging  
When the HDD is returned to Fujitsu, the following methods are recommended.  
6.5.1  
Single HDD packaging  
Figure 6.2 Single HDD packaging  
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(1)  
Put the HDD into FCELL.  
•
•
At this time, the connector of the HDD is directed to the hinge side of FCELL.  
The PCBA is put in the side with the material mark of FCELL.  
(2)  
(3)  
Push from two corners of FCELL on the hinge side previously, push two corners of the opening  
next, and lock FCELL surely.  
Put the above unitary packaging (packed in FCELL) into the conductivity bag by securing the  
cushion.  
(4)  
(5)  
(6)  
Put the HDD with conductivity bag into the cardboard box.  
Put the desiccant (10g) into the conductivity bag.  
Seal the conductivity bag with the packaging tape, then close the cardboard box.  
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6.5.2  
Multi-box packaging  
(upper)  
(lower)  
Figure 6.3 Multi-box packaging  
(1)  
(2)  
Put the conductivity bag into the milti-box, in addition put the cushion (lower) into the bag.  
Put unitary packaging (FCELL) in the cushion (lower).  
•
•
At this time, FCELL is put in the cushion (lower) so that the FCELL opening may become  
downward. The I/F connector may become upward.  
For less than 20 HDDs, insert the HDDs starting from the slot with the smallest number in  
Figure 6.4. Then place the empty FCELL in the empty slot.  
(3)  
(4)  
Hold the HDD with the cushion (upper)  
Put the desiccant (100g) into the conductivity bag  
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(5)  
(6)  
(7)  
Put the long desiccant between the cushion (upper)  
Seal the conductivity bag with the packaging tape  
Close the cardboard box with the packaging tape  
(Attach the tape in 'H' figure at the tape.)  
Figure 6.4 Fraction packaging  
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CHAPTER 7  
ERROR ANALYSIS  
7.1  
7.2  
Sense Data Collection  
Sense Data Analysis  
This chapter explains in detail how sense data collected from an HDD is used for troubleshooting. Sense  
data reflects an error in the HDD, and helps with troubleshooting.  
7.1  
Sense Data Collection  
Sense data  
7.1.1  
When HDD 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 HDD generates sense data  
about the command-issuing initiator. The initiator can read the sense data by issuing a REQUEST  
SENSE command.  
This HDD is equipped with sense data with a byte length of 48. Accordingly, Fujitsu  
recommends collecting all 48-byte sense data when the host unit collects sense data.  
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 initiator 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 Subsection 3.1.15 “REQUEST SENSE  
(15)” of the SCSI Logical Interface Specifications.  
A sense key, additional sense code, and additional sense code qualifier, 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 an additional sense code,  
and the rightmost x is an additional sense code qualifier.  
7.1.2  
Sense data format  
Figure 7.1 shows the sense data format.  
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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
[MSB]  
Basic  
information  
9
10  
11  
12  
13  
14  
[LSB]  
Additional sense code  
Additional sense code qualifier  
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  
MSB: Most significant byte  
LSB: Least significant byte  
LUN: Logical unit number  
SKSV: Sense key specific valid  
SCSI ID: SCSI identifier  
Figure 7.1 Sense data format  
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7.2  
Sense Data Analysis  
7.2.1  
Error information indicated with sense data  
Table 7.1 lists the definition of sense data. For details of sense data, refer to Chapter 5 “Sense  
Data Error Recovery Methods” of the SCSI Logical Interface Specifications.  
Subsection 7.2.2 onwards explain troubleshooting using sense data.  
Table 7.1 Definition of sense data  
Sense data  
Sense  
key  
Additional Additional  
sense code sense code  
qualifier  
Definition  
00  
3
00  
00  
03  
Operation was normal.  
0C  
A write to a disk terminated abnormally.  
4
32  
40  
C4  
00  
xx  
xx  
Failed to allocate the alternate block in the alternate processing.  
An error occurred in power-on self-diagnosis.  
An HDD 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  
90  
xx  
00  
An SCSI error, such as an invalid operation code, occurred.  
The RESERVE or RELEASE command cannot be executed  
because the SCSI ID of the initiator was not posted in the  
SELECTION phase.  
4 or B  
B
44  
xx  
A hardware error occurred inside the HDD.  
47  
48  
49  
4D  
xx  
00  
00  
xx  
A parity error occurred in the SCSI data bus.  
Initiator Detected Error message was received.  
An uncounted or inappropriate message was received.  
Before completion of a command, a command with the same tag  
number was issued.  
4E  
00  
An overlap command was issued.  
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115  
7.2.2  
Sense data (3-0C-03), (4-32-00), (4-40-xx), and (4-C4-xx)  
Sense data (3-0C-03), (4-32-00), (4-40-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.  
Failed to allocate the alternate block in the alternate processing.  
An error occurred in power-on self-diagnosis.  
An HDD error occurred.  
The symptoms above are generally caused by an error in the PCBA or the DE.  
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 Subsection 3.3.2 “REASSIGN BLOCKS (07)” of  
the SCSI Logical Interface Specifications.  
If this error occurs in different blocks, the PCBA or the DE is faulty.  
7.2.4  
Sense data (4-44-xx), (5-2x-xx), (5-90-00), (B-44-xx), (B-47-xx), (B-48-00), (B-49-00),  
(B-4D-xx) and (B-4E-00): SCSI interface error  
Sense data (5-2x-xx), (5-90-00), (B-44-xx), (B-47-xx), (B-48-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 hardware error occurred inside the HDD.  
A parity error occurred in the SCSI bus.  
If this error occurs, the PCBA or the SCSI interface cable is faulty.  
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APPENDIX A SETTING TERMINALS  
A.1 Setting Terminals (on NP model only)  
This appendix describes setting terminals.  
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A.1  
Setting Terminals (on NP model only)  
Table A.1 CN2 setting terminal (on NP model drives only)  
Pin pair  
5 - 6 7 - 8 9 - 10  
Setting item  
Setting contents  
1 - 2  
3 - 4  
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  
Pin pair  
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.  
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APPENDIX B  
CONNECTOR SIGNALALLOCATION  
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.  
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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  
–DB10  
–DB09  
–DB08  
–I/O  
Reserved (N.C.)  
DIFFSNS  
DB11  
DB10  
DB09  
DB08  
I/O  
–REQ  
REQ  
–C/D  
C/D  
–SEL  
SEL  
–MSG  
MSG  
–RST  
RST  
ACK  
–ACK  
–BSY  
BSY  
–ATN  
ATN  
–P_CRCA  
–DB07  
–DB06  
–DB05  
–DB04  
–DB03  
–DB02  
–DB01  
–DB00  
–DBP1  
–DB15  
–DB14  
–DB13  
–DB12  
5V  
P_CRCA  
DB07  
DB06  
DB05  
DB04  
DB03  
DB02  
DB01  
DB00  
DBP1  
DB15  
DB14  
DB13  
DB12  
5V RETURN (MATED 2)  
5V RETURN (GND)  
5V RETURN (GND)  
–LED  
5V  
5V (Charge)  
N. C.  
RMT START  
SCSI ID0  
SCSI ID2  
DLYD START  
SCSI ID1  
SCSI ID3  
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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  
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Glossary  
Additional Sense Code  
This is a 1-byte code displayed in the sense data and is information which  
specifies the type of error that was detected.  
Bus phase  
The name of SCSI bus state. The SCSI bus can be either in the BUS FREE,  
ARBITRATION, SELECTION, RESELECTION or INFORMATION  
TRANSFER phase. The INFORMATION TRANSFER phase is divided into  
subphases such as DATA IN, DATA OUT, COMMAND, STATUS,  
MESSAGE IN, and MESSAGE OUT.  
CDB  
Command Descriptor Block  
A series of data which describes commands related to input/output operations,  
sent from the initiator to the target.  
Command  
This is a command to a target to perform an input/output operation, and it is  
described as the CDB.  
Disconnect  
Operation performed by the target to free itself from the SCSI bus and the  
initiator temporarily when SCSI bus operation becomes unnecessary during  
command processing.  
Initiator  
This is an SCSI device which initiates input and output operations on the SCSI  
bus.  
Message  
Logical unit  
Information that controls a series of bus phases and I/O sequence between the  
initiator and the target on the SCSI bus.  
Simple unit of equipment that can be directed to perform one I/O operation on  
the SCSI bus.  
LUN  
Logical unit number used to identify a logical unit.  
Reconnect  
Operation performed by the target to reconnect itself with the initiator when  
operation on the SCSI bus becomes necessary after disconnection.  
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123  
SCSI  
Small Computer System Interface  
The standardized input/output interface of the American National Standards  
Institute (ANSI). [Standard No.: ANSI X3. 131-1986]  
SCSI Device  
SCSI ID  
The general name given to a device which is connected to the SCSI bus  
(input/output device, I/O controller, host adapter, expander, etc.).  
A physical device address which identifies an SCSI device on the SCSI bus.  
Each SCSI device must have a unique ID. The SCSI IDs can be 0 to 7, which  
corresponds to one bit of the data bus.  
Sense Data  
When several items of error information are included in a command's  
completion status, this is information generated by the target for reporting  
detailed information on that status.  
Sense Key  
Status  
This is a 4-bit code displayed in the sense data. It contains information for  
classifying the type of error that was detected.  
This is 1 byte of information reported to the initiator by the target device when  
execution of each command is completed, which displays the command's  
completion state.  
Target  
This is the SCSI device that executes the input/output operations initiated by the  
initiator.  
124  
C141-E270  
Acronyms and Abbreviations  
A
G
AC  
ACK  
ARRE  
Alternating Current  
ACKnowledge  
Automatic Read Reallocation  
Enabled  
Gbps  
Gigabits per second  
H
ATN  
AWG  
AWRE  
ATteNtion  
HDC  
HDD  
Hard Disk Controller  
Hard Disk Drive  
American Wire Gauge  
Automatic Write Reallocation  
Enabled  
I
ID  
I/O  
IDentifier  
Input/Output  
B
BPI  
BSY  
Bits Per Inch  
BuSY  
L
LED  
LSI  
Light Emitting Diode  
Large-Scale Integration  
circuit  
C
C/D  
Control/Data  
Command Descriptor Block  
Complete List  
LUN  
Logical Unit Number  
CDB  
CmpLst  
CRC  
CYL  
Cyclic Redundancy Check  
CYLinder  
M
MEEPRML Modified Enhanced  
Extended Partial  
D
Response Maximum  
Likelihood  
DC  
Direct Current  
MPU  
MR  
MSG  
MTBF  
MicroProcessor Unit  
Magnetro Resistive  
MeSsaGe  
DCR  
DCRT  
DE  
DevOfl  
DPO  
DTE  
Disable CoRrection  
Disable CeRtificaTion  
Disk Enclosure  
Device Offline  
Disable Page Out  
Disable Transfer on Error  
Mean Time  
Between Failure  
Mean Time To Repair  
MTTR  
OEM  
O
E
Original Equipment  
Manufacturer  
ECC  
EER  
Error Correction Code  
Enable Early Recovery  
F
FG  
FIFO  
FmtData  
Frame Ground  
First In First Out  
Format Data  
C141-E270  
125  
P
P/N  
Parts/Number  
PCBA  
Printed Circuit Board  
Assembly  
PER  
Post ERror  
PLO Sync  
Phase Lock Oscillator  
Syncronous  
PMI  
Partial Medium Indicator  
R
RCD  
REQ  
RH  
Read Cache Disable  
REQuest  
Relative Humidity  
ReSeT  
RST  
S
S/N  
SCSI  
Serial/Number  
Small Computer System  
Interface  
SCT  
SEL  
SelfTest  
SG  
SeCTor  
SELect  
Self Test  
Signal Ground  
Save Page  
SP  
SPM  
SPindle Motor  
T
TB  
TPI  
Transfer Block  
Tracks Per Inch  
U
UnitOfl  
VCM  
Unit Offline  
V
Voice Coil Motor  
W
WCE  
Write Cache Enable  
126  
C141-E270  
INDEX  
16-bit SCSI ID external input...........................63  
16-bit SCSI interface connector .......................61  
68-pin type LVD 16-bit SCSI ........................121  
8-bit SCSI/16-bit SCSI.....................................14  
continuous block processing.............................15  
control mode parameter....................................92  
controller circuit ...............................................18  
current...............................................................53  
current waveform........................................54, 55  
cylinder configuration ......................................32  
A
AC noise filter ..................................................58  
acoustic noise .............................................17, 23  
actuator.............................................................18  
additional sense code......................................113  
additional sense code qualifier .......................113  
addressing of peripheral device........................20  
air circulation (recirculation filter, breather  
filter).............................................................18  
allowable input voltage ....................................53  
alternate area.....................................................39  
alternate block allocation..................................40  
alternate block allocation by REASSIGN  
D
data format........................................................31  
data space .........................................................31  
default mode setting (by CHANGE  
DEFINITION command) .............................80  
defect list ..........................................................40  
defect management...........................................40  
defective block slipping....................................17  
definition of sense data...................................115  
delivery.............................................................72  
diagnosis...........................................................17  
diagnostic..........................................................95  
diagnostic test.................................................104  
disconnection/reconnection parameter .............91  
disk ...................................................................18  
disk read error.................................................116  
dismounting HDD ............................................93  
BLOCKS command......................................43  
alternate block allocation during FORMAT  
UNIT command execution ...........................41  
alternate cylinder ..............................................34  
alternate spare area ...........................................33  
automatic alternate block allocation.................43  
automatic alternate block reassignment............16  
E
B
each mode setting .............................................78  
ECC ..................................................................37  
environmental protection..................................14  
environmental specification..............................25  
environmental temperature...............................52  
environmental/power requirement..............25, 26  
error analysis ..................................................113  
error information indicated with sense data....115  
error rate ...........................................................26  
error recovery ...................................................16  
error recovery during self-diagnostic ...............97  
error recovery parameter ..................................90  
external dimension............................................47  
external magnetic field .....................................53  
external operator panel circuit example............68  
external operator panel connector ....................62  
basic operation test ...........................................99  
BCRC ...............................................................37  
block address of user space ..............................39  
bock descriptor .................................................87  
C
cache feature.....................................................15  
caching parameter.............................................92  
check before mounting .....................................81  
check items at illegal operation ........................83  
checking at abnormal end.................................87  
checking operation ...........................................83  
checking procedure...........................................84  
checking SCSI connection....................84, 85, 86  
CN1 ........................................................120, 121  
CN2 setting terminal.......................................118  
command queuing feature ................................16  
confirming initial operation..............................83  
connecting cable...............................................82  
connection ........................................................73  
connector signal allocation.............................119  
C141-E270  
127  
mounting...........................................................50  
mounting frame structure..................................51  
mounting HDD.................................................81  
mounting procedure..........................................81  
mounting requirement ......................................47  
mounting screw ................................................51  
multi-segment data buffer.................................15  
F
factory maintenance........................................101  
field maintenance............................................101  
finding possibly faulty part.............................108  
format capacity.................................................38  
format parameter ..............................................88  
FORMAT UNIT command ..............................88  
formatting.........................................................87  
N
NC connector location......................................58  
NC model dimension........................................48  
note on handling HDD .....................................71  
NP connector and terminal location .................60  
NP model dimensions.......................................49  
G
gaps...................................................................37  
general note ......................................................71  
H
O
hardware function test ......................................96  
hardware structure............................................18  
HDD replacement...........................................101  
HDD troubleshooting .....................................107  
head ..................................................................18  
head skew .........................................................35  
high speed data transfer....................................15  
high speed positioning......................................17  
online self-diagnostic........................................97  
operation check...............................................104  
operation test ..................................................104  
order number ....................................................21  
outline of troubleshooting procedure..............105  
P
packaging..................................................72, 108  
PAD..................................................................37  
page code........................................88, 90, 91, 92  
part replacement .............................................101  
parts that can be replaced in field...................100  
physical sector allocation..................................35  
PLO Sync .........................................................37  
positioning error rate ........................................27  
power consumption ..........................................17  
power on/off sequence................................55, 56  
power supply connector....................................61  
power supply requirement ................................53  
precaution .........................................................99  
preventive maintenance..................................100  
programmable data block length ......................16  
I
initial seek operation check ............................104  
initial self-diagnostic ........................................96  
installation ..................................................71, 72  
installation requirement....................................47  
interface test .....................................................99  
internal test space .............................................33  
L
large capacity....................................................17  
leak magnetic flux ............................................53  
limitation of bottom-mounting .........................52  
limitation of side-mounting ........................51, 52  
logical data block addressing............................38  
R
M
random/sequential read test ..............................99  
read/write circuit...............................................18  
read/write error recovery parameter .................90  
reassignment.....................................................44  
recommended component for connection.........67  
reliability...........................................................27  
removal.............................................................72  
repair...............................................................101  
replacement.......................................................72  
reporting result of self-diagnostic and error  
maintenance......................................................99  
maintenance level...........................................101  
maintenance requirement................................100  
mean time between failure (MTBF) .................27  
mean time to repair (MTTR) ............................27  
microcode downloading ...................................17  
MODE SELECT/MODE SELECT  
EXTENDED command................................87  
mode setting .....................................................80  
model name ......................................................21  
motor start mode...............................................78  
motor start mode setting ...................................78  
indication......................................................98  
reserve and release function .............................16  
128  
C141-E270  
START/STOP command..................................83  
start/stop of spindle motor................................17  
storage ..............................................................72  
surface temperature check point.......................52  
surface temperature measurement point ...........53  
system configuration ........................................19  
system space.....................................................33  
S
SCA2 type LVD 16-bit SCSI .........................120  
SCA2 type SCSI connector ..............................59  
SCSI bus configuration ....................................20  
SCSI bus connection ........................................74  
SCSI cable connection......................................66  
SCSI connector.......................................120, 121  
SCSI connector signal allocation............120, 121  
SCSI function specification..............................29  
SCSI ID setting...........................................76, 77  
SCSI interface error........................................116  
SCSI standard...................................................14  
sector format.....................................................36  
seek test ............................................................96  
self-diagnostic ..................................................95  
self-diagnostic function ....................................95  
SEND DIAGNOSTIC command .....................97  
sense data................................................113, 116  
sense data analysis..........................................115  
sense data collection.......................................113  
sense data format............................................114  
sense key ........................................................113  
service life ......................................................100  
service system.................................................101  
setting bus width of SCSI interface..................79  
setting check list (NP model only) ...................81  
setting of SCSI interface operation mode.........79  
setting parameter ..............................................89  
setting SCSI terminator power supply..............78  
setting terminal.........................................75, 117  
setting terminal (on NP model only) ..............118  
setting terminal location ...................................75  
setting terminator power supply .......................78  
single HDD packaging ...................................108  
spindle motor....................................................18  
T
test ..................................................................102  
test flowchart ..................................................103  
test program......................................................98  
tool and test equipment...................................102  
track format ......................................................35  
track skew.........................................................35  
troubleshooting...............................................105  
troubleshooting at repair site ..........................107  
troubleshooting with HDD replacement in  
field.............................................................105  
troubleshooting with part replacement in  
factory.........................................................108  
U
unpackaging......................................................72  
unrecoverable error rate....................................26  
user space .........................................................33  
V
verify error recovery parameter........................90  
W
write protect......................................................79  
write protect setting ..........................................79  
write/read test .............................................96, 99  
C141-E270  
129  
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C141-E270-01EN  
MBA3300NC, MBA3300NP, MBA3147NC, MBA3147NP, MBA3073NC,  
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