C141-E270-01EN
MBA3300NC, MBA3300NP
MBA3147NC, MBA3147NP
MBA3073NC, MBA3073NP
HARD DISK DRIVES
PRODUCT MANUAL
FOR SAFE OPERATION
Handling of This manual
This manual contains important information for using this product. Read thoroughly before using the
product. Use this product only after thoroughly reading and understanding especially the section
“Important Alert Items” in this manual. Keep this manual handy, and keep it carefully.
FUJITSU makes every effort to prevent users and bystanders from being injured or from suffering damage
to their property. Use the product according to this manual.
IMPORTANT NOTE TO USERS
READ THE ENTIRE MANUAL CAREFULLY BEFORE USING THIS PRODUCT.
INCORRECT USE OF THE PRODUCT MAY RESULT IN INJURY OR DAMAGE
TO USERS, BYSTANDERS OR PROPERTY.
While FUJITSU has sought to ensure the accuracy of all information in this manual, FUJITSU assumes no
liability to any party for any damage caused by any error or omission contained in this manual, its updates
or supplements, whether such errors or omissions result from negligence, accident, or any other cause. In
addition, FUJITSU assumes no liability with respect to the application or use of any porduct or system in
accordance with the descriptions or instructions contained herein; including any liability for incidental or
consequential damages arising therefrom.
FUJTSU DISCLAIMS ALL WARRANTIES REGARDING THE INFORMATION CONTAINED
HEREIN, WHETHER EXPRESSED, IMPLIED, OR STATUTORY.
FUJITSU reserves the right to make changes to any products described herein without further notice and
without obligation.
This product is designed and manufactured for use in standard applications such as office work, personal
devices and household appliances. This product is not intended for special uses (atomic controls,
aeronautic or space systems, mass transport vehicle operating controls, medical devices for life support, or
weapons firing controls) where particularly high reliability requirements exist, where the pertinent levels of
safety are not guaranteed, or where a failure or operational error could threaten a life or cause a physical
injury (hereafter referred to as "mission-critical" use). Customers considering the use of these products for
mission-critical applications must have safety-assurance measures in place beforehand. Moreover, they are
requested to consult our sales representative before embarking on such specialized use.
The contents of this manual may be revised without prior notice.
The contents of this manual shall not be disclosed in any way or reproduced in any media without the
express written permission of Fujitsu Limited.
All Right Reserved, Copyright © FUJITSU LIMITED 2007
C141-E270
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] SCSI Primary Commands-2 (SPC-2)
T10/996D Rev.8c [NCITS.306:1998] SCSI-3 Block Commands (SBC)
T10/1157D Rev.24 SCSI Architecture Model-2 (SAM-2)
T10/1365D Rev.10 SCSI Parallel Interface-4 (SPI-4)
*1 ANSI = American National Standard Institute
In case of conflict between this manual and any referenced document, this manual takes
precedence.
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 GENERAL DESCRIPTION
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
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:
CAUTION
This indicates that either minor or moderate
personal injury may occur if the user does not
perform the procedure correctly.
IMPORTANT
This indicates information that the helps the user
use the product more effectively.
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
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.
Damage
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
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.
2. Do not connect or disconnect cables when power is on.(except NC model)
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.
50
71
75
(NP model only)
82
82
C141-E270 3
Task Alert message Page
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 selfdiagnostics.
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.
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.
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.
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.
93
98
99
99
100
100
107
4 C141-E270
MANUAL ORGANIZATION
PRODUCT
MANUAL
(This manual)
1. General Description
2. Specifications
3. Data Format
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
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CONTENTS
page
CHAPTER 1
1.1 Standard Features ............................................................................................................. 14
1.2 Hardware Structure .......................................................................................................... 18
1.3 System Configuration....................................................................................................... 19
CHAPTER 2 SPECIFICATIONS .......................................................................................... 21
2.1 Hardware Specifications................................................................................................... 21
2.1.1 Model name and order number ........................................................................................ 21
2.1.2 Function specifications..................................................................................................... 22
2.1.3 Environmental specifications ........................................................................................... 25
2.1.4 Error rate .......................................................................................................................... 26
2.1.5 Reliability ......................................................................................................................... 27
2.2 SCSI Function Specifications........................................................................................... 29
CHAPTER 3 DATA FORMAT .............................................................................................. 31
3.1 Data Space........................................................................................................................ 31
3.1.1 Cylinder configuration ..................................................................................................... 31
3.1.2 Alternate spare area .......................................................................................................... 33
GENERAL DESCRIPTION............................................................................ 13
3.1.3 Track format..................................................................................................................... 35
3.1.4 Sector format .................................................................................................................... 36
3.1.5 Format capacity ................................................................................................................ 38
3.2 Logical Data Block Addressing ....................................................................................... 38
3.3 Defect Management ......................................................................................................... 40
3.3.1 Defect list ......................................................................................................................... 40
3.3.2 Alternate block allocation ................................................................................................ 40
CHAPTER 4 INSTALLATION REQUIREMENTS ............................................................ 47
4.1 Mounting Requirements................................................................................................... 47
4.1.1 External dimensions ......................................................................................................... 47
4.1.2 Mounting orientations ...................................................................................................... 50
4.1.3 Notes on mounting ........................................................................................................... 50
4.2 Power Supply Requirements ............................................................................................ 53
4.3 Connection Requirements ................................................................................................ 58
4.3.1 SCA2 connector type 16-bit SCSI model (NC model)..................................................... 58
C141-E270 7
4.3.2
68-pin connector type 16-bit SCSI model (NP model) .................................................... 60
4.3.3 Cable connector requirements .......................................................................................... 67
4.3.4 External operator panel (on NP model drives only)......................................................... 68
CHAPTER 5 INSTALLATION.............................................................................................. 71
5.1 Notes on Handling HDDs ................................................................................................ 71
5.2 Connections...................................................................................................................... 73
5.3 Setting Terminals ............................................................................................................. 75
5.3.1 SCSI ID setting.................................................................................................................76
5.3.2 Each mode setting ............................................................................................................ 78
5.3.3 Mode settings ...................................................................................................................80
5.4 Mounting HDDs............................................................................................................... 81
5.4.1 Check before mounting .................................................................................................... 81
5.4.2 Mounting procedures........................................................................................................ 81
5.5 Connecting Cables............................................................................................................ 82
5.6 Checking Operation after Installation and Preparing the HDDs for Use ......................... 83
5.6.1 Confirming initial operations ........................................................................................... 83
5.6.2 Checking SCSI connection............................................................................................... 84
5.6.3 Formatting ........................................................................................................................ 87
5.6.4 Setting parameters ............................................................................................................ 89
5.7 Dismounting HDDs.......................................................................................................... 93
CHAPTER 6 DIAGNOSTICS AND MAINTENANCE ....................................................... 95
6.1 Diagnostics ....................................................................................................................... 95
6.1.1 Self-diagnostics ................................................................................................................95
6.1.2 Test programs...................................................................................................................98
6.2 Maintenance .....................................................................................................................99
6.2.1 Precautions ....................................................................................................................... 99
6.2.2 Maintenance requirements................................................................................................ 100
6.2.3 Maintenance levels ........................................................................................................... 101
6.2.4 Tools and test equipment.................................................................................................. 102
6.2.5 Tests ................................................................................................................................. 102
6.3 Operation Check............................................................................................................... 104
6.3.1 Initial seek operation check.............................................................................................. 104
6.3.2 Operation test ................................................................................................................... 104
6.3.3 Diagnostic test .................................................................................................................. 104
6.4 Troubleshooting ............................................................................................................... 105
8 C141-E270
6.4.1
Outline of troubleshooting procedures ............................................................................. 105
6.4.2 Troubleshooting with HDD replacement in the field ....................................................... 105
6.4.3 Troubleshooting at the repair site..................................................................................... 107
6.4.4 Troubleshooting with parts replacement in the factory.................................................... 108
6.4.5 Finding possibly faulty parts ............................................................................................ 108
6.5 Packaging ......................................................................................................................... 108
6.5.1 Single HDD packaging..................................................................................................... 108
6.5.2 Multi-box packaging ........................................................................................................ 110
CHAPTER 7 ERROR ANALYSIS......................................................................................... 113
7.1 Sense Data Collection ...................................................................................................... 113
7.1.1 Sense data......................................................................................................................... 113
7.1.2 Sense data format ............................................................................................................. 113
7.2 Sense Data Analysis ......................................................................................................... 115
7.2.1 Error information indicated with sense data..................................................................... 115
7.2.2 Sense data (3-0C-03), (4-32-00), (4-40-xx), and (4-C4-xx) ............................................ 116
7.2.3 Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error................................... 116
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............................................ 116
APPENDIX A SETTING TERMINALS ................................................................................. 117
A.1 Setting Terminals (on NP model only)............................................................................. 118
APPENDIX B CONNECTOR SIGNAL ALLOCATION ..................................................... 119
B.1 SCSI Connector Signal Allocation: SCA2 type LVD 16-bit SCSI ................................. 120
B.2 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
Figure 3.1
Figure 3.2 Spare area in cell..................................................................................................................34
Figure 3.3 Alternate cylinder ................................................................................................................34
Figure 3.4 Track format ........................................................................................................................35
Figure 3.5 Track skew/head skew.........................................................................................................36
Figure 3.6 Sector format .......................................................................................................................36
Figure 3.7 Alternate block allocation by FORMAT UNIT command..................................................42
Figure 3.8 Alternate block allocation by REASSIGN BLOCKS command.........................................43
Figure 4.1
Figure 4.2 NP model dimensions..........................................................................................................49
Figure 4.3 HDD orientations.................................................................................................................50
Figure 4.4 Mounting frame structure ....................................................................................................51
Figure 4.5 Limitation of side-mounting................................................................................................52
Figure 4.6 Surface temperature measurement points............................................................................53
System configuration...........................................................................................................19
Cylinder configuration.........................................................................................................32
NC model dimensions..........................................................................................................48
Figure 4.7 Current waveform (Spin-up) ...............................................................................................54
Figure 4.8 Current waveform (Max seek).............................................................................................55
Figure 4.9 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 Setting terminals location (on NP models only)..................................................................75
Figure 5.3 CN2 setting terminal (on NP models only) .........................................................................76
Figure 5.4 Checking the SCSI connection (A) .....................................................................................85
Figure 5.5 Checking the SCSI connection (B)......................................................................................86
Figure 6.1
Figure 6.2 Single HDD packaging......................................................................................................108
Figure 6.3 Multi-box packaging..........................................................................................................110
Figure 6.4 Fraction packaging ............................................................................................................111
Figure 7.1
SCSI bus connections ..........................................................................................................74
Test flowchart....................................................................................................................103
Sense data format...............................................................................................................114
C141-E270 11
TABLES
page
Table 2.1
Table 2.2 Function specifications ........................................................................................................22
Table 2.2 Function specifications (continued).....................................................................................23
Table 2.3 Environmental/power requirements.....................................................................................25
Table 2.3 Environmental/power requirements (continued) .................................................................26
Table 2.4 SCSI function specifications ...............................................................................................29
Table 3.1
Table 4.1
Table 4.2 Recommended components for connection.........................................................................67
Table 5.1
Table 5.2 Setting SCSI terminator power supply (NP model).............................................................78
Table 5.3 Motor start mode setting......................................................................................................78
Table 5.4 Write protect setting (NP model).........................................................................................79
Table 5.5 Setting of the SCSI interface operation mode (NP model)..................................................79
Model names and order numbers.........................................................................................21
Format capacity ...................................................................................................................38
Surface temperature check point .........................................................................................52
SCSI ID setting....................................................................................................................77
Table 5.6 Setting the bus width of the SCSI interface (NP model) ....................................................79
Table 5.7 Default mode settings (by CHANGE DEFINITION command).........................................80
Table 5.8 Setting check list (NP model only) ......................................................................................81
Table 6.1
Table 6.2 System-level field troubleshooting ....................................................................................106
Table 6.3 HDD troubleshooting ........................................................................................................107
Table 7.1
Table A.1
Table B.1
Table B.2 SCSI connector (68-pin type LVD 16-bit SCSI): CN1 ....................................................121
Self-diagnostic functions .....................................................................................................95
Definition of sense data .....................................................................................................115
CN2 setting terminal (on NP model drives only) ..............................................................118
SCSI connector (SCA2 type LVD 16-bit SCSI): CN1 .....................................................120
12 C141-E270
CHAPTER 1 GENERAL DESCRIPTION
1.1 Standard Features
1.2 Hardware Structure
1.3 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) 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).
(3) 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: 8 drives max. (option for NP model)
• 16-bit SCSI: 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) Automatic alternate block reassignment
If a defective data block is detected during read or write the HDD can automatically reassign its
alternate data block.
(13) 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) High speed positioning
A rotary voice coil motor achieves fast positioning with high performance access control.
(16) 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) Start/Stop of spindle motor
Using the SCSI command, the host system can start and stop the spindle motor.
(18) 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) Low acoustic noise
The acoustic noise level is low; approx. 3.6 Bels at Idle. This makes it ideal for office use.
(21) 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) Heads
The heads have MR (Magnet-Resistive) read element Ramp Load type slider.
(3) 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) 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.
(5) Air circulation (recirculation filter, breather filter)
The disk enclosure (DE) configures a clean room to keep out particle and other contaminants.
The DE has a closed-loop air recirculation system. Using the movement of the rotating disks, air
is continuously cycled through a filter. This filter will trap any particle floating inside the
enclosure and keep the air inside the DE contaminant free. To prevent negative pressure in the
vicinity of the spindle when the disks begin rotating, a breather filter is attached. The breather
filter also equalizes the internal air pressure with the atmospheric pressure due to surrounding
temperature changes.
(6) 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.
(7) 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
HDDHDD
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: 8-bit SCSI:Selectable from 0 to 7 (option for NP model, switch selectable)
16-bit SCSI:Selectable from 0 to 15 (switch selectable)
• LUN: 0 (fixed)
20 C141-E270
CHAPTER 2 SPECIFICATIONS
2.1 Hardware Specifications
2.2 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
Model name Order number SCSI type
MBA3300NC CA06708-B400 SCA2, LVD
MBA3300NP CA06708-B850 68-pin, LVD
MBA3147NC CA06708-B200 SCA2, LVD
MBA3147NP CA06708-B650 68-pin, LVD
MBA3073NC CA06708-B100 SCA2, LVD
MBA3073NP CA06708-B550 68-pin, LVD
(*) One gigabyte (GB) = one billion bytes; accessible capacity will be less and actual
capacity depends on the operating environment and formatting.
Capacity
(user area)
300 GB (*)
147 GB (*)
73.5 GB (*)
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) 300 GB (*2) 147 GB (*2) 73.5 GB (*2)
Number of disks 4 2 1
Number of heads 8 4 2
Tracks per Surface 82,604 cyl typ. (standard format including the alternate cylinder)
Recording mode 60/62 MEEPRML
Areal density 124.7 Gbit/inch
2
Maximum recording density 860 kBPI
Track density 145 kTPI typ.
Seek time
(Read/Write)
(*3)
Track to
Track
Average 3.4 ms / 3.9 ms
0.2 ms / 0.4 ms
Full stroke 8.0 ms / 9.0 ms
Number of rotations 15,000 ± 0.2 % min-1 (rpm)
Average latency time 2.0 ms
Start/stop time (*4)
ready up time 30 s typ. (60 s max.)
Stop time 30 s typ.
Height 26.1 mm max.
External dimensions
Width 101.6 mm ± 0.25 mm
Length 147.0 mm max.
Weight 0.8 kg max.
Power consumption (*5) 13.06 W typ.
Fast 5 SCSI Cable length: 6 m max.
Single
ended
Interface
LVD
Data transfer rate (*10)
Fast 10 SCSI Cable length: 3 m max.
Fast 20 SCSI
Ultra 2 Wide
U160
U320
Cable length: 3 m max. (*6)
Cable length: 1.5 m max. (*7)
Cable length: 25 m max. (*8)
Cable length: 12 m max. (*9)
Internal 188 MB/s (standard format, most outer)
External 320 MB/s max.
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
Related standards
SPI-4 (T10/1365D Rev. 10), SAM-2 (T10/1157D Rev. 24),
SPC-2 (T10/1236D Rev. 20), SBC (T10/996D Rev. 8c)
Data buffer 8 MB FIFO ring buffer (*12)
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) One gigabyte (GB) = one billion bytes; accessible capacity will be less and actual capacity
depends on the operating environment and formatting.
(*3) The seek time is as follows:
Seek time [ms]
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) This value indicates during idle mode. Power supply at nominal voltage ± 1%. 25°C ambient.
(*6) Up to 4 SCSI devices having capacitance of 25pF or less can use cable length of up to 3.0 m.
(*7) 5 to 8 SCSI devices having capacitance of 25pF or less can use cable length of up to 1.5 m.
(*8) 1 on 1 connection case.
(*9) 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) Refer to 1.1(13).
(*12) 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
Item
MBA3300NC
MBA3300NP
Operating 5 to 55°C
Non-operating –40 to 70°C
Temperature
(*1)
Transport –40 to 70°C
DE surface temperature at operating 5 to 60°C
Gradient 20°C/h or less
Operating 5 to 95%RH
Relative
humidity
Non operating 5 to 95%RH
Transport 5 to 95%RH
Maximum wet bulb temperature 29°C (no condensation)
Operating (*3) 0.6 mm (5 to 20 Hz)/9.8 m/s2 (1 G) (20 to 300 Hz) or less
Vibration
(*2)
Non-operating (*4) 3.1 mm (5 to 20 Hz)/49m/s2 (5 G) (20 to 300 Hz) or less
Transport (packaged) 3.1 mm (5 to 20 Hz)/49m/s
Operating 637.4 m/s2 (65 G)/2 ms duration
Shock (*2)
Non-operating 2451.7 m/s2 (250 G)/2 ms duration
Transport (packaged) 2451.7 m/s
Operating –305 to +3,048 m (-1,000 to +10,000 feet)
Altitude
Non-operating –305 to +12,192 m (-1,000 to +40,000 feet)
Regulation ± 5 %
Ready (average) 0.88 A 0.60 A 0.45 A
Power
requirement
(*5)
+12V DC
Spin up
Peak operating current
Maximum (peak) DC (*6)
Peak operating current
DC (reference) (*6)
2.8 A 2.5 A 2.3 A
1.15 A 0.9 A 0.75 A
Specification
MBA3147NC
MBA3147NP
2
(5 G) (20 to 300 Hz) or less
2
(250 G)/2 ms duration
2.5 A (peak)
3.5 A (less than 100 μs)
MBA3073NC
MBA3073NP
C141-E270 25
Table 2.3 Environmental/power requirements (continued)
Specification
Item
MBA3300NC
MBA3300NP
MBA3147NC
MBA3147NP
MBA3073NC
MBA3073NP
Regulation ± 5 %
Ready (average) 0.5 A
Power
requirement
(*5)
+5V DC
Peak operating current
Maximum (peak) DC
(*6)
Peak operating current
DC (reference) (*6)
1.5 A
0.79 A
Ripple (+5 V, +12 V) 250 mVp-p or less (*7)
(*1) For detail condition, see Section 4.1.
(*2) Vibration applied to the drive is measured at near the mounting screw hole on the frame as much
as possible.
(*3) At random seek write/read and default on retry setting with log sweep vibration.
(*4) At power-off state after installation
Vibration displacement should be less than 2.5 mm.
(*5) Input voltages are specified at the HDD connector side during HDD Idle state.
(*6) Operating currents are values under random W/R operation of full partition at about 220 IOPS.
(*7) High frequency noise (over 20 MHz) is less than 100 mVp-p.
2.1.4 Error rate
Errors detected during initialization and replaced by alternate block assignments are not included
in the error rate. Data blocks to be accessed should be distributed over the disk equally.
(1) Unrecoverable error rate
Errors which cannot be recovered within 63 retries and ECC correction should not exceed 10 per
16
bits read.
10
(2) Positioning error rate
Positioning errors which can be recovered by one retry should be 10 or less per 10
8
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) 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.
(3) 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 5 years
• DE surface temperature: from 41°C to 45°C 4.5 years
• DE surface temperature: from 46°C to 50°C 4 years
• DE surface temperature: from 51°C to 55°C 3.5 years
• DE surface temperature: from 56°C to 60°C 3 years
• 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.)
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
Electrical
requirements
(*1)
Single-ended type
HVD type (High Voltage Differential)
LVD type (Low Voltage Differential)
Single-ended type
Differential type
Position where the terminating
resistor is mounted on the PCA
Position where the terminating
resistor is mounted on the PCA
TERMPWR signal send function
68-pin P cable connector
Ο
×
Ο
×
×
Ο (NP model)
Ο (NP model)
Connector
80-pin SCA2 connector
Data bus parity (Data bus CRC)
Bus arbitration function
Disconnection/reconnection function
SCSI ID 16-bit SCSI
Addressing
(Jumper selection, NP model)
Ο (NC model)
Ο
Ο
Ο
#0 to #15
LUN (logical unit number) #0 fixed
Ο 20 MB/s max.
Ο 40 MB/s max.
Ο 40 MB/s max.
Ο 80 MB/s max.
Ο 160 MB/s max.
Ο 320 MB/s max.
Data transfer
(Synchronous
mode) (*2)
8-bit SCSI (Single-ended type)
(Ultra 2 type)
16-bit SCSI (Single-ended type)
(Ultra 2 Wide type)
(U160 LVD type)
(U320 LVD type)
Data buffer (*3) 8 MB
Data block length (Logical data length=Physical data length) (*4)
512 to 528 bytes
(Fixed length)
Ο : Provided × : Not provided
(*1) The driver mode (Single-ended or LVD) changes automatically by Diffsence signal level.
(*2) 1MB/s=1,000,000 bytes/s
(*3) 1MB=1,048,576 bytes
(*4) Refer to (13) of Section 1.1.
C141-E270 29
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CHAPTER 3 DATA FORMAT
3.1 Data Space
3.2 Logical Data Block Addressing
3.3 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) 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.
(3) 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.
Cell
Track 0 Sector 0 1
Track 1 n n+1 2n-m-1 2n-m 2n-2 2n-1
Last track
n-m-1 n-m n-2 n-1
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.
PAD
G2
PLO
SyncG1
SCT
SM1
DATA1 SM2 DATA4
BCRC ECC
PAD
SCT
SCT
G1
PLO
SyncG1
PLO
Sync
SM1
SM1
DATA1
DATA1
SM2 BCRCDATA2 ECC
Servo
SM2 DATA3
PAD
G2
Figure 3.6 Sector format
Each sector on the track consists of the following fields:
36 C141-E270
SCT
G3
(1) Gaps (G1, G2, G3)
No pattern is written on the gap field.
(2) PLO Sync
In this field, pattern X'00' in the specified length in bytes is written.
(3) 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.
(4) 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) 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.
(6) 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.
(7) 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.
C141-E270 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 Format capacity
MBA3300NC,
585,937,500 300 GB (*)
MBA3300NP
MBA3147NC,
MBA3147NP
MBA3073NC,
512
287,277,984 147 GB (*)
143,638,992 73.5 GB (*)
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
3.3.1 Defect list
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 C141-E270
(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
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CHAPTER 4 INSTALLATION REQUIREMENTS
4.1 Mounting Requirements
4.2 Power Supply Requirements
4.3 Connection Requirements
This chapter describes the environmental, mounting, power supply, and connection requirements.
4.1 Mounting Requirements
4.1.1 External dimensions
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
C141-E270 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
4.1.3 Notes on mounting
Damage
Never remove any labels from the HDD or deface them in any way.
Direction of
gravity
Figure 4.3 HDD orientations
CAUTION
(f) Upright mounting –2
50 C141-E270
(1) Mounting screw
Use No.6-32UNC.
(2) 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
Holes for
mounting screw
4
3
1
Use four holes (No.1 to No.4) to mount.
Figure 4.5 Limitation of side-mounting
(4) Limitation of bottom-mounting
Use all four mounting holes on the bottom face.
2
Holes for mounting screw
In case of using a
center hole, use it in
combination with the
holes of both ends.
(5) 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
No. Measurement point
1 DE surface 60 °C
2 Read channel LSI 82 °C
3 VCM/SPM Driver 100 °C
4 HDC 100 °C
5 MPU 94 °C
Max. temperature on
package
52 C141-E270
2
5
1
4
Figure 4.6 Surface temperature measurement points
(6) External magnetic field
Do not install the HDDs in the vicinity of equipment giving off strong magnetic fields, such as
monitors, televisions, or loudspeakers.
(7) 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.
3
C141-E270 53
5VDC
MBA3300NC
MBA3300NP
MBA3147NC
MBA3147NP
MBA3073NC
MBA3073NP
Current (500mA/div)
12VDC
Current (500mA/div)
Time (2 sec/div)
MBA3300NC
MBA3300NP
Time (2 sec/div)
Current (500mA/div)
Time (2 sec/div)
MBA3147NC
MBA3147NP
Current (500mA/div)
Time (2 sec/div)
Figure 4.7 Current waveform (Spin-up)
Current (500mA/div)
Time (2 sec/div)
MBA3073NC
MBA3073NP
Current (500mA/div)
Time (2 sec/div)
54 C141-E270
Figure 4.8 shows the max seek current waveform of +5V DC and +12V DC.
+5VDC
MBA3300NC
MBA3300NP
MBA3147NC
MBA3147NP
MBA3073NC
MBA3073NP
Current (500mA/div)
Time (10 msec/div)
+12VDC
MBA3300NC
MBA3300NP
Current (500mA/div)
Time (10 msec/div)
(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.
Current (500mA/div)
Time (10 msec/div)
MBA3147NC
MBA3147NP
Current (500mA/div)
Time (10 msec/div)
Current (500mA/div)
Current (500mA/div)
Figure 4.8 Current waveform (Max seek)
Time (10 msec/div)
MBA3073NC
MBA3073NP
Time (10 msec/div)
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
r
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
resisto
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
.
.
.
15
0
12 s
24 s
.
.
.
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 SCA2 connector type 16-bit SCSI model (NC model)
(1) 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
Pin 34
m
m
m
m
m
m
m
m
m
m
m
Pin 1
2.00m
Pin A1
Pin 1
2.54m
Pin 68
1.27m
0.40m
0.635m
Pin 35
2.00
0.40m
1.00m
Pin A2
5.08m
1.30m
5.08m
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)
(3) SG terminal
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 Signal
A1 –ID0
A2 Fault LED
A3 –ID1
A4 ESID
A5 –ID2
A6 (Reserved)
A7 –ID3
A8 –LED
A9 N.C
A10 GND
A11 +5 V
A12 –WTP
Figure 4.18 External operator panel connector (CN1)
Pin 2
Pin 1
2.0mm
2.0mm
Figure 4.19 External operator panel connector (CN2)
Pin 24
Pin 23
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
C141-E270 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.
C141-E270 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 C141-E270
4.3.3 Cable connector requirements
Table 4.2 lists the recommended components cable connection.
Table 4.2 Recommended components for connection
Applicable
model
NC
Type Name
SCSI connector
(CN1)
SCSI cable (CN1)
Power supply
cable (CN1)
NP
External operator
panel (CN1)
External operator
panel (CN2)
(*1) See Figure 4.22.
Part number
(Size)
787311-4
Connector
Manufacturer
Tyco Electronics
AMP
71743-1085 Molex
DHJ-PAC68-2AN-
Cable socket
(closed-end type)
Signal cable
FG
5786090-7
UL20528-FRX68-P0.635
Cable socket housing 1-480424-0
Contact 170148-1
Fujikura
Tyco Electronics
AMP
Fujikura
Tyco Electronics
AMP
Tyco Electronics
AMP
Cable (AWG18 to 24)
Cable socket housing A3B-12D-2C
Contact A3B-2630SCC
HIROSE
ELECTRIC
HIROSE
ELECTRIC
Cable (AWG26 to 36)
Cable socket housing FCN-723J024/2M
Contact FCN-723J-G/AM
FUJITSU
TAKAMIZAWA
FUJITSU
TAKAMIZAWA
Cable (AWG28)
Reference
(*1)
S1
S2
S3
S4
(1) SCSI cable
Refer to Section 1.3 “Physical Requirements” and Section 1.4 “Electrical Requirements” of the
SCSI Physical Interface Specifications.
(2) Power cable
HDDs must be star-connected to the DC power supply (one to one connection) to reduce the
influence of load variations.
(3) 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)
Ω
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
(*1)
C
N
C
N
A1
A3
1
2
A5
A7
A10
S3
A8
A11
S4
21
22
-ID0
-ID1
-ID2
-ID3
GND
-LED
+5V
LED (+5V)
-LED
Approx. 300
ID0
ID1
ID2
ID3
(LED)
R
(LED)
(for 16-bit SCSI)
(*1) For connecting the external LED to CN2.
Figure 4.23 External operator panel circuit example
68 C141-E270
IMPORTANT
Do not connect the external LED to both CN1 and CN2. Connect it
to either of them.
C141-E270 69
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70 C141-E270
CHAPTER 5 INSTALLATION
5.1 Notes on Handling HDDs
5.2 Connections
5.3 Setting Terminals
5.4 Mounting HDDs
5.5 Connecting Cables
5.6 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) 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.
(3) 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.
(4) 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.
(1) Connecting one HDD
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 2
Pin 24
CN2
Pin 1
Figure 5.2 Setting terminals location (on NP models only)
C141-E270 75
Pin 23
N
4 2
24
22 20 18 16 14 12 10 8 6
21 19 17 15 13 11 9 7 5 3 1
23
Terminator power supply: Supply
(LED signal)
(HDD Reset signal)
.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 SCSI ID setting
SCSI
NC model (CN1) NP model (CN2)
ID
Pin 39 Pin 79 Pin 40 Pin 80
Pin pair
1/2
Pin pair
3/4
Pin pair
5/6
Pin pair
7/8
0 Open Open Open Open Open Open Open Open
1 Short Open Open Open Short Open Open Open
2 Open Short Open Open Open Short Open Open
3 Short Short Open Open Short Short Open Open
4 Open Open Short Open Open Open Short Open
5 Short Open Short Open Short Open Short Open
6 Open Short Short Open Open Short Short Open
7 Short Short Short Open Short Short Short Open
8 Open Open Open Short Open Open Open Short
9 Short Open Open Short Short Open Open Short
10 Open Short Open Short Open Short Open Short
11 Short Short Open Short Short Short Open Short
12 Open Open Short Short Open Open Short Short
13 Short Open Short Short Short Open Short Short
14 Open Short Short Short Open Short Short Short
15 (*1) Short Short Short Short Short Short Short Short
*1 Set at factory shipment.
IMPORTANT
1. To set the setting terminals on NC models to short, apply voltage
ranging between -0.3 V and 0.8 V to the setting terminals externally. To
set the setting terminals on NC models to open, apply voltage ranging
between 2.0 V and 5.5 V to the setting terminals from an external source.
2. Set the SCSI ID so that there are no duplicates between SCSI devices on
the same SCSI bus.
3. The priority of SCSI bus use in ARBITRATION phase is determined by
SCSI ID as follows:
7 > 6 > 5 > 4 > 3 > 2 > 1 > 0 > 15 > 14 > 13 > 12 > 11 > 10 > 9 > 8
C141-E270 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 Open
Supply on Short (*1)
*1. Set at factory shipment.
For NC model, the function of the terminator power supply setting is not supported.
(2) Motor start mode
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 38 of CN1
(RMT START)
Pin 78 of CN1
(DYLD START)
Pin pair 11/12 of
CN2
(GND/RMSTART)
Starting of the motor is controlled
with the START/STOP UNIT
Short Open or Short Open
command.
The motor is started immediately
after the power supply is turned on or
Open Open Short (*1)
after the microcode is downloaded.
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
Open Short (*2)
turned on or after the microprogram
is downloaded.
*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)
Write protect
Pin pair 9/10 of CN2
(GND/WTP)
Write operation is enabled. Open (*1)
Write operation is disable. Short
*1. Set at factory shipment.
For NC model, the function of the write protect setting is not supported.
(4) Setting of the SCSI interface operation mode
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)
Operation mode
Pin pair 15/16 of CN2
(GND/DIFFSENS)
Follows the DIFFSNS signal level on the SCSI bus Open (*1)
Single-Ended mode 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)
Bus width
Pin pair 13/14 of CN2
(GND/8/16 SW)
16-bit bus Open (*1)
8-bit bus 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 level SCSI-3
SYNCHRONOUS DATA TRANSFER REQUEST message
sending
Not sent from HDD
UNIT ATTENTION report mode Reported
Reselection retry count Not restricted
WIDE DATA TRANSFER REQUEST message sending Not sent from HDD
Reselection time-out delay 250 ms
Spindle motor start delay time
0 sec (NP)
12 sec × SCSI ID (NC)
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)
No.
(Check item)
1 SCSI ID 1/2
Setting contents
Pin pair on CN2
3/4
5/6
Check Remarks
(SCSI ID = __) Upper bus
(DB 8 to 15 PI)
not connected
7/8
2 Write protect 9/10 Short Open
3 Motor start mode 11/12 Short Open
4 Force Narrow 13/14 Short Open
5 Force single ended 15/16 Short Open
6 Terminator power supply 23/24 Short Open
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
5.6.1 Confirming initial operations
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.
C141-E270 83
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.
84 C141-E270
Motor starts when power is turned on
N
(
Self test = 1
d
60
Figure 5.4 Checking the SCSI connection (A)
Unit Of =1
o parameter
C141-E270 85
Motor starts by START/STOP command
* Executing time: about 60 seconds
Figure 5.5 Checking the SCSI connection (B)
86 C141-E270
(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.
C141-E270 87
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.
88 C141-E270
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.
C141-E270 89
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
• AWRE:
• ARRE:
• TB:
• EER:
• PER:
• DCR:
Automatic alternate block allocation at Write
operation
Automatic alternate block allocation at read
operation
Uncorrectable data transfer to the initiator
Immediate correction of correctable error
Report of recovered error
Suppression of ECC error correction
1 (enabled)
1 (enabled)
1 (enabled)
1 (enabled)
0 (disabled)
0 (Correction is
enabled.)
• 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:
• DCR:
Immediate correction of recoverable error
Report of recovered error
Stop of command processing at successful
error recovery
Suppression of ECC error correction
1 (enabled)
0 (disabled)
0 (Processing is
continued.)
0 (Correction is
enabled.)
• RETRY COUNT AT VERIFICATION 63
c. Additional error recovery parameters (page code = 21)
Parameter Default value
• Retry count at seek error 15
90 C141-E270
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
• Buffer full ratio 00 (HEX)
• 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.
C141-E270 91
(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 Default value
• IC: Initiator control 0 (HDD-specific
control (page
cache))
• RCD: Disabling Read-Ahead caching operations 0 (enabled)
• WCE: Write Cache Enable 1 (enabled)
• MF: Specifying the multipliers of "MINIMUM
PRE-FETCH" and "MAXIMUM PRE-
0 (Specifying
absolute value)
FETCH" parameters
• DISC: Prefetch operation after track switching during
1 (enable)
prefetching
• DISABLE PRE-FETCH TRANSFER LENGTH X'FFFF'
• MINIMUM PRE-FETCH X'0000'
• MAXIMUM PRE-FETCH X' 0000'
• MAXIMUM PRE-FETCH CEILING X'FFFF'
• NUMBER OF CACHE SEGMENTS X'08'
Notes:
1. When Read-Ahead caching operations are disabled by the caching parameter, these
parameter settings have no meaning except write cache feature.
2. Determine the parameters in consideration of how the system accesses the disk. When
the access form is not determined uniquely because of the processing method, the
parameters can be re-set actively.
3. For sequential access, the effective access rate can be increased by enabling Read-Ahead
caching operations and Write Cache feature.
(4) Control mode parameters (page code = A)
The following parameters are used to control the tagged queuing and error logging.
92 C141-E270
a. Control mode parameters
Parameter Default value
• QUEUE ALGORITHM MODIFIER 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).
C141-E270 93
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CHAPTER 6 DIAGNOSTICS AND MAINTENANCE
6.1 Diagnostics
6.2 Maintenance
6.3 Operation Check
6.4 Troubleshooting
6.5 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
C141-E270 95
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 selfdiagnostics.
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.
96 C141-E270
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