Fujitsu C141-E185-01EN MAS3184NC-NP, C141-E185-01EN MAS3735NC-NP, C141-E185-01EN MAS3367NC-NP User Manual
C141-E185-01EN
MAS3735NC/NP
MAS3367NC/NP
MAS3184NC/NP
DISK DRIVES
PRODUCT/MAINTENANCE 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 2002
C141-E185
REVISION RECORD
Edition Date published Revised contents
01 November, 2002
Specification No.: C141-E185-**EN
C141-E185 i
Related Standards
Product specifications and functions described in this manual comply with the following ANSI
(*1) standards.
Document number Title
T10/1236D Rev.20
[NCITS.351:2001]
T10/996D Rev.8c
[NCITS.306:1998]
T10/1157D Rev.20 SCSI Architecture Model-2 (SAM-2)
T10/1365D Rev.7 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.
SCSI Primary Commands-2 (SPC-2)
SCSI-3 Block Commands (SBC)
ii C141-E185
PREFACE
This manual describes the MAS3735NC/NP, MAS3367NC/NP and MAS3184NC/NP (hereafter, MAS
series), 3.5 type fixed disk drives with an embedded SCSI controller.
This manual details the specifications and functions of the above disk drive, and gives the requirements and
procedures for installing it into a host computer system.
This manual is written for users who have a basic understanding of fixed disk drives and their use in
computer systems. The MANUAL ORGANIZATION section describes organization and scope of this
manual. The need arises, use the other manuals.
OVERVIEW OF MANUAL
This manual consists of the following eight chapters:
CHAPTER 1 GENERAL DESCRIPTION
This chapter introduces the MAS series disk drives and discusses their standard features, hardware, and
system configuration.
CHAPTER 2 SPECIFICATIONS
This chapter gives detailed specifications of the MAS series disk drives and their installation environment.
CHAPTER 3 DATA FORMAT
This chapter describes the data structure of the disk, the address method, and what to do about media
defects.
CHAPTER 4 INSTALLATION REQUIREMENTS
This chapter describes the basic physical and electrical requirements for installing MAS series disk drives.
CHAPTER 5 INSTALLATION
This chapter explains how to install MAS series disk drives. It includes the notice and procedures for
setting device number and operation modes, mounting the disk drive, connecting the cables, and confirming
drive operation.
CHAPTER 6 DIAGNOSIS AND MAINTENANCE
This chapter describes the automatic diagnosis, and maintenance of MAS series disk drive. This chapter
also describes diagnostic methods for operation check and the basics of troubleshooting the disk drives.
CHAPTER 7 ERROR ANALYSIS
This chapter describes in details how collect the information for error analysis and how analyze collected
error information.
APPENDIX A TO B
The appendixes give supplementary information, including a list of setting items and the signal assignments
of interface connector.
C141-E185 iii
CONVENTIONS FOR ALERT MESSAGES
This manual uses the following conventions for alerts to prevent physical or property damages to users or
by standards.
CAUTION
NOTICE
IMPORTANT
CONVENTIONS USED IN THIS MANUAL
The MAS3735NC/NP, MAS3367NC/NP and MAS3184NC/NP disk drives are described as "the intelligent
disk drive (IDD)", "the drive" or "the device" in this manual.
Decimal number is represented normally.
Hexadecimal number is represented as X'17B9', 17B9h or 17B9H.
Binary number is represented as "010".
This indicates that either minor or moderate
personal injury may occur if the user does not
perform the procedure correctly.
This indicates that inconvenience to the user
such as damages to the product, equipment, data,
and/or other property may occur if the user does
not pay attention or perform the procedure
correctly.
This indicates information that the helps the user
use the product more effectively.
ATTENTION
Please forward any comments you may have regarding this manual.
To make this manual easier for users to understand, opinions from readers are needed. Please write your
opinions or requests on the Comment at the back of this manual and forward it to the address described in
the sheet.
iv C141-E185
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
Mounting Installation
Data loss
For MAS series, Reed Solomon codes are applied for their ECC.
The sector-data is divided into 4 interleaving sectors, and ECC is
performed in each sector where the maximum number of errors
(up to 5 byte) can be corrected. [Total maximum byte: 5 byte
( interleave) = 20 byte]
If the error of read sector keeps allowable error byte number,
correction is performed.
However, if error byte exceeds its allowable number, correction
may not be performed properly.
Hot temperature
To prevent injury, do not handle the drive until after the device has
cooled sufficiently after turning off the power. The DE and LSI
become hot during operation and remain hot immediately after
turning off the power.
Data loss
1. The user must not change the setting of terminals not described
in this section. Do not change setting status set at factory
shipment.
2. Do not change the setting of terminals except following setting
pins during the power is turned on.
• Write protect: CN2 9-10 (NP model only)
3. To short the setting terminal, use the short plug attached when
the device is shipped from the factory.
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)
×
4
2-5
5-1
5-5
5-12
C141-E185 v
Task Alert message Page
Mounting Installation
Damage
1. Be careful of the insertion orientation of the SCSI connectors.
With the system in which terminating resistor power is supplied
via the SCSI cable, if the power is turned on, the overcurrent
protection fuse of the terminating resistor power supplier may
be blown or the cable may be burnt if overcurrent protection is
not provided.
When the recommended parts listed in Table 4.2 are used,
inserting the cables in the wrong direction can be prevented.
2. To connect SCSI devices, be careful of the connection position
of the cable. Check that the SCSI device with the terminating
resistor is the last device connected to the cable.
Data loss
When the SEND DIAGNOSTIC command terminates with the
CHECK CONDITION status, the INIT must collect the error
information using the REQUEST SENSE command. The RECEIVE
DIAGNOSTIC RESULTS command cannot read out the error
information detected in the self-diagnostics.
Caution
1. To avoid shocks, turn off the power before connecting or
disconnecting a cable, connector, or plug.
2. To avoid injury, do not touch the mechanical assembly during
disk drive operation.
3. Do not use solvents to clean the disk drive.
Caution
1. Always ground yourself with a wrist strap connected to ground
before handling. ESD (Electrostatics Discharge) may cause
the damage to the device.
2. To prevent electrical damage to the disk drive, turn the power
off before connecting or disconnecting a cable, connector, or
plug.
3. Do not remove a PCA. This operation is required to prevent
unexpected or unpredictable operation.
4. Do not use a conductive cleaner to clean a disk drive assembly.
5. Ribbon cables are marked with a colored line. Connect the
ribbon cable to a cable connector with the colored wire
connected to pin 1.
Damage
Never open the disk enclosure in the field. Opening the disk
enclosure may cause an irreparable fault.
Data loss
Save data stored on the disk drive before requesting repair. Fujitsu
does not assume responsibility if data is destroyed during servicing
or repair.
5-12
6-4
6-5
6-6
6-6
6-15
6-7
vi C141-E185
MANUAL ORGANIZATION
PRODUCT/
MAINTENANCE
MANUAL
(This manual)
SCSI Physical
Interface
Specifications
SCSI Logical
Interface
Specifications
1. General Description
2. Specifications
3. Data Format
4. Installation Requirements
5. Installation
6. Diagnostics and Maintenance
7. Error Analysis
1. SCSI Bus
2. SCSI Message
3. SCSI Bus Error Recovery Processing
1. Command Processing
2. Data Buffer Management
3. Command Specification
4. Sense Data and error Recovery Procedure
5. Disk Medium Management
C141-E185 vii
This page is intentionally left blank.
CONTENTS
page
CHAPTER 1 GENERAL DESCRIPTION ............................................................................1-1
1.1 Standard Features ..............................................................................................................1-2
1.2 Hardware Structure............................................................................................................1-6
1.3 System Configuration........................................................................................................1-9
CHAPTER 2 SPECIFICATIONS...........................................................................................2-1
2.1 Hardware Specifications....................................................................................................2-1
2.1.1 Model name and order number..........................................................................................2-1
2.1.2 Function specifications......................................................................................................2-2
2.1.3 Environmental specifications ............................................................................................2-4
2.1.4 Error rate ...........................................................................................................................2-5
2.1.5 Reliability..........................................................................................................................2-5
2.2 SCSI Function Specifications............................................................................................2-7
CHAPTER 3 DATA FORMAT...............................................................................................3-1
3.1 Data Space.........................................................................................................................3-1
3.1.1 Cylinder configuration.......................................................................................................3-1
3.1.2 Alternate spare area...........................................................................................................3-4
3.1.3 Track format......................................................................................................................3-5
3.1.4 Sector format.....................................................................................................................3-7
3.1.5 Format capacity.................................................................................................................3-9
3.2 Logical Data Block Addressing.........................................................................................3-9
3.3 Defect Management...........................................................................................................3-11
3.3.1 Defect list ..........................................................................................................................3-11
3.3.2 Alternate block allocation .................................................................................................3-11
CHAPTER 4 INSTALLATION REQUIREMENTS .............................................................4-1
4.1 Mounting Requirements ....................................................................................................4-1
4.1.1 External dimensions ..........................................................................................................4-1
4.1.2 Mounting...........................................................................................................................4-4
4.1.3 Notes on mounting ............................................................................................................4-4
4.2 Power Supply Requirements .............................................................................................4-8
4.3 Connection Requirements..................................................................................................4-11
4.3.1 SCA2 connector type 16-bit SCSI model (NC model)......................................................4-11
C141-E185 ix
4.3.2 68 pin connector type 16-bit SCSI model (NP model)......................................................4-13
4.3.3 Cable connector requirements ...........................................................................................4-20
4.3.4 External operator panel (on NP model drives only) ..........................................................4-21
CHAPTER 5 INSTALLATION...............................................................................................5-1
5.1 Notes on Handling Drives.................................................................................................5-1
5.2 Connections.......................................................................................................................5-3
5.3 Setting Terminals ..............................................................................................................5-5
5.3.1 SCSI ID setting..................................................................................................................5-6
5.3.2 Each mode setting .............................................................................................................5-8
5.3.3 Mode settings ....................................................................................................................5-10
5.4 Mounting Drives................................................................................................................5-11
5.4.1 Check before mounting .....................................................................................................5-11
5.4.2 Mounting procedures.........................................................................................................5-11
5.5 Connecting Cables.............................................................................................................5-12
5.6Confirming Operations after Installation and Preparation for Use....................................5-13
5.6.1 Confirming initial operations.............................................................................................5-13
5.6.2 Checking SCSI connection................................................................................................5-14
5.6.3 Formatting .........................................................................................................................5-17
5.6.4 Setting parameters .............................................................................................................5-19
5.7 Dismounting Drives...........................................................................................................5-23
5.8 Spare Disk Drive ...............................................................................................................5-23
CHAPTER 6 DIAGNOSTICS AND MAINTENANCE ........................................................6-1
6.1 Diagnostics........................................................................................................................6-1
6.1.1 Self-diagnostics .................................................................................................................6-1
6.1.2 Test programs....................................................................................................................6-4
6.2 Maintenance Information ..................................................................................................6-5
6.2.1 Precautions........................................................................................................................6-5
6.2.2 Maintenance requirements.................................................................................................6-6
6.2.3 Maintenance levels ............................................................................................................6-8
6.2.4 Revision numbers..............................................................................................................6-9
6.2.5 Tools and test equipment...................................................................................................6-10
6.2.6 Tests ..................................................................................................................................6-10
6.3 Operation Check................................................................................................................6-12
6.3.1 Initial seek operation check...............................................................................................6-12
6.3.2 Operation test ....................................................................................................................6-12
x C141-E185
6.3.3 Diagnostic test ...................................................................................................................6-12
6.4 Troubleshooting Procedures..............................................................................................6-13
6.4.1 Outline of troubleshooting procedures ..............................................................................6-13
6.4.2 Troubleshooting with disk drive replacement in the field .................................................6-13
6.4.3 Troubleshooting at the repair site......................................................................................6-15
6.4.4 Troubleshooting with parts replacement in the factory .....................................................6-16
6.4.5 Finding possibly faulty parts .............................................................................................6-16
CHAPTER 7 ERROR ANALYSIS .........................................................................................7-1
7.1 Error Analysis Information Collection ..............................................................................7-1
7.1.1 Sense data..........................................................................................................................7-1
7.1.2 Sense key, sense code, and subsense code ........................................................................7-1
7.2 Sense Data Analysis ..........................................................................................................7-3
7.2.1 Error information indicated with sense data ......................................................................7-3
7.2.2 Sense data (3-0C-03), (4-40-xx), (4-44-xx), and (4-C4-xx)..............................................7-4
7.2.3 Sense data (1-1x-xx), (3-1x-xx) and (E-1D-00): Disk read error ....................................7-4
7.2.4 Sense data (5-2x-xx), (5-3D-00), (5-90-00), (B-47-xx), (B-49-00),
(B-4D-xx) and (B-4E-00): SCSI interface error...............................................................7-4
APPENDIX A SETTING TERMINALS..................................................................................A-1
A.1 Setting Terminals (on NP model only)..............................................................................A-2
APPENDIX B CONNECTOR SIGNAL ALLOCATION .......................................................B-1
B.1 SCSI Connector Signal Allocation: SCA2 type LVD 16-bit SCSI...................................B-2
B.2 SCSI Connector Signal Allocation: 68 pin type LVD 16-bit SCSI ..................................B-3
INDEX ........................................................................................................................................IN-1
C141-E185 xi
FIGURES
page
Figure 1.1 NC model drives outer view .................................................................................................1-6
Figure 1.2 NP model drives outer view .................................................................................................1-6
Figure 1.3 Disk/head configuration........................................................................................................1-7
Figure 1.4 System configuration ............................................................................................................1-9
Figure 3.1 Cylinder configuration..........................................................................................................3-2
Figure 3.2 Spare area in cell ..................................................................................................................3-5
Figure 3.3 Alternate cylinder .................................................................................................................3-5
Figure 3.4 Track format.........................................................................................................................3-6
Figure 3.5 Track skew/head skew..........................................................................................................3-7
Figure 3.6 Sector format ........................................................................................................................3-7
Figure 3.7 Alternate block allocation by FORMAT UNIT command .................................................3-13
Figure 3.8 Alternate block allocation by REASSIGN BLOCKS command ........................................3-14
Figure 4.1 NC external dimensions........................................................................................................4-2
Figure 4.2 NP external dimensions........................................................................................................4-3
Figure 4.3 IDD orientations ...................................................................................................................4-4
Figure 4.4 Mounting frame structure .....................................................................................................4-5
Figure 4.5 Limitation of side-mounting .................................................................................................4-5
Figure 4.6 Surface temperature measurement points .............................................................................4-6
Figure 4.7 Service clearance area ..........................................................................................................4-7
Figure 4.8 Spin-up current waveform (+12 VDC).................................................................................4-8
Figure 4.9 Power on/off sequence (1)....................................................................................................4-8
Figure 4.10 Power on/off sequence (2)....................................................................................................4-9
Figure 4.11 Power on/off sequence (3)....................................................................................................4-9
Figure 4.12 AC noise filter (recommended) ..........................................................................................4-11
Figure 4.13 NC connectors location ......................................................................................................4-11
Figure 4.14 SCA2 type 16-bit SCSI connector......................................................................................4-12
Figure 4.15 NP connectors and terminals location ................................................................................4-13
Figure 4.16 68 pin type 16-bit SCSI interface connector.......................................................................4-14
Figure 4.17 Power supply connector (68 pin type 16-bit SCSI) ............................................................4-14
Figure 4.18 External operator panel connector (CN1)...........................................................................4-15
Figure 4.19 External operator panel connector (CN2)...........................................................................4-15
xii C141-E185
Figure 4.20 16-bit SCSI ID external input.............................................................................................4-16
Figure 4.21 Output signal for external LED ..........................................................................................4-18
Figure 4.22 SCSI cables connection ......................................................................................................4-19
Figure 4.23 External operator panel circuit example.............................................................................4-21
Figure 5.1 SCSI bus connections ..........................................................................................................5-4
Figure 5.2 Setting terminals location (on NP models only) ...................................................................5-5
Figure 5.3 CN2 setting terminal (on NP models only)...........................................................................5-6
Figure 5.4 Checking the SCSI connection (A).....................................................................................5-15
Figure 5.5 Checking the SCSI connection (B).....................................................................................5-16
Figure 6.1 Revision label.......................................................................................................................6-9
Figure 6.2 Indicating revision numbers................................................................................................6-10
Figure 6.3 Test flowchart.....................................................................................................................6-11
Figure 7.1 Format of extended sense data..............................................................................................7-2
C141-E185 xiii
TABLES
page
Table 2.1 Model names and order numbers..............................................................................................2-1
Table 2.2 Function specifications.............................................................................................................2-2
Table 2.3 Environmental/power requirements..........................................................................................2-4
Table 2.4 SCSI function specifications.....................................................................................................2-7
Table 3.1 Zone layout and track capacity .................................................................................................3-3
Table 3.4 Format capacity ........................................................................................................................3-9
Table 4.1 Surface temperature check point...............................................................................................4-6
Table 4.2 Recommended components for connection............................................................................4-20
Table 5.1 SCSI ID setting.........................................................................................................................5-7
Table 5.2 Setting SCSI terminator power supply (NP model)..................................................................5-8
Table 5.3 Motor start mode setting...........................................................................................................5-8
Table 5.4 Write protect setting (NP model)..............................................................................................5-9
Table 5.5 Setting of the SCSI interface operation mode (NP model).......................................................5-9
Table 5.6 Setting the bus width of the SCSI interface (NP model)..........................................................5-9
Table 5.7 Default mode settings (by CHANGE DEFINITION command) ............................................5-10
Table 5.8 Setting check list (NP model only) .........................................................................................5-11
Table 6.1 Self-diagnostic functions ..........................................................................................................6-1
Table 6.2 System-level field troubleshooting .........................................................................................6-14
Table 6.3 Disk drive troubleshooting .....................................................................................................6-15
Table 7.1 Definition of sense data............................................................................................................7-3
Table A.1 CN2 setting terminal (on NP model drives only).................................................................A-2
Table B.1 SCSI connector (SCA2 type LVD 16-bit SCSI): CN1 ........................................................... B-2
Table B.2 SCSI connector (68 pin type LVD 16-bit SCSI): CN1...........................................................B-3
xiv C141-E185
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 MAS series intelligent disk drives (IDD).
IDDs are high performance large capacity 3.5 type fixed disk drives with an embedded SCSI controller.
The MAS series disk drives support the Small Computer System Interface (SCSI) as described in the ANSI
SCSI SPI-4 [T10/1365D Rev.7] to the extent described in this manual.
The flexibility and expandability of the SCSI, as well as the powerful command set of the IDD, allow the
user to construct a high-performance reliable disk subsystem with large storage capacity.
The data format can be changed from the format at factory shipment by reinitializing with the user's system.
Refer to SCSI Logical Interface Specifications for details.
C141-E185 1-1
1.1 Standard Features
(1) Compactness
Since the SCSI controller circuit is embedded in the standard 3.5 type fixed disk drive form factor,
the IDD is extremely compact. The IDD can be connected directly to the SCSI bus of the host
system.
(2) SCSI standard
The IDD provides not only SCSI basic functions but also the following features:
• Arbitration
• Disconnection/Reconnection
• Data bus parity
The SCSI commands can manipulate data through logical block addressing regardless of the
physical characteristics of the disk drive. This allows software to accommodate future expansion
of system functions.
(3) 8-bit SCSI/16-bit SCSI
The IDD has 16-bit data bus width (16-bit SCSI), which have the wide transfer function suitable
for SCSI-2. 8-bit data bus is available only with NP model.
See subsection 5.3.2 for details of the bus width setting.
For the ultra SCSI model, number of connectable SCSI devices on the same SCSI bus is varied as
follows.
• 8-bit SCSI: 8 drives max. (option for NP model)
• 16-bit SCSI: 16 drives max.
(4) High speed data transfer
Such a high data transfer rate on the SCSI bus can be useful with the large capacity buffer in the
IDD.
• 8-bit SCSI: The data transfer rate on the SCSI bus is 40 MB/s maximum at the
synchronous mode.
• 16-bit SCSI: The data transfer rate on the SCSI bus is 320 MB/s maximum at the paced
transfer synchronous mode.
1-2 C141-E185
Note:
The maximum data transfer rate in asynchronous mode may be limited by the response time of
initiator and the length of SCSI bus length. The maximum data transfer rate in synchronous
mode may be limited by the cable length, transmission characteristics of the SCSI bus and the
connected SCSI device number.
(5) Continuous block processing
The addressing method of data blocks is logical block address. The initiator can access data by
specifying block number in a logically continuous data space without concerning the physical
structure of the track or cylinder boundaries.
The continuous processing up to [64K-1] blocks in a command can be achieved, and IDD can perform
continuous read/write operation when processing data blocks on several tracks or cylinder.
(6) Programmable multi-segment data buffer
The data buffer is 8M bytes. Data is transferred between SCSI bus and disk media through this
data buffer. This feature provides the suitable usage environment for users.
Since the initiator can control the disconnect/reconnect timing on the SCSI bus by specifying the
condition of stored data to the data buffer or empty condition of the data buffer, the initiator can
perform the effective input/output operations with utilizing high data transfer capability of the
SCSI bus regardless of actual data transfer rate of the disk drive.
(7) Cache feature
After executing the READ command, the IDD reads automatically and stores (prefetches) the
subsequent data blocks into the data buffer (Read-ahead caching).
The high speed sequential data access can be achieved by transferring the data from the data buffer
without reaccessing the disk in case the subsequent command requests the prefetched data blocks.
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.
IMPORTANT
When Write cache is enabled, you should ensure that the cashed
data is surely flushed to the disc media before you turn off the drive's
power.
To ensure it, you should issue either the SYNCHRONIZE CASHE
command or the STOP UNIT command with specifying “0” to the
Immed bit and then confirm that the command is surely terminated
with the GOOD STATUS.
C141-E185 1-3
(8) Command queuing feature
The IDD can queue maximum 128 commands, and optimizes the issuing order of queued
commands by the reordering function. This feature realizes the high speed processing.
(9) Reserve and release functions
The IDD can be accessed exclusively in the multi-host or multi-initiator environment by using the
reserve and release functions.
(10) Error recovery
The IDD can try to recover from errors in SCSI bus or the disk drive using its powerful retry
processing. If a recoverable data check occurs, error-free data can be transferred to the initiator
after being corrected in the data buffer. The initiator software is released from the complicated
error recover processing by these error recovery functions of the IDD.
(11) Automatic alternate block reassignment
If a defective data block is detected during read or write the IDD can automatically reassign its
alternate data block.
(12) 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.
Error rate increase
1. The drive format at factory shipment is generally 512 byte.
2. The Recoverable Error of the drive might increase when the
format would be modified from 512 bytes to the following values:
516 bytes, 520 bytes, 524 bytes, 528 bytes.
3. The Recoverable Error referred to here is sense data (1-13-xx).
(13) 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.
(14) High speed positioning
IMPORTANT
A rotary voice coil motor achieves fast positioning.
1-4 C141-E185
(15) Large capacity
A large capacity can be obtained from 3.5 inch disk drives by dividing all cylinders into several
partitions and changing the recording density on each partition (constant density recording). The
disk subsystem with large capacity can be constructed in the good space efficiency.
(16) Start/Stop of spindle motor
Using the SCSI command, the host system can start and stop the spindle motor.
(17) Diagnosis
The IDD has a diagnostic capability which checks internal controller functions and drive
operations to facilitate testing and repair.
(18) Low power consumption
By using highly integrated LSI components, the power consumption of the IDD is very low, and
this enables the unit to be used in wide range of environmental conditions.
(19) Low noise and low vibration
The noise level is low; approx. 3.6 Bels Ready for MAS series. This makes it ideal for office use.
(20) Microcode downloading
The IDD implements the microcode download feature. This feature achieves easy maintainability
of the IDD and function enhancing.
C141-E185 1-5
1.2 Hardware Structure
An outer view of the IDD is given in Figures 1.1 and 1.2. The IDD is composed of the disk, head,
spindle motor, mounted disk enclosure (DE) with actuator and air circulation filter, as well as
read/write pre-amp with the printed circuit assembly (PCA) of the controller.
Figure 1.1 NC model drives outer view
Figure 1.2 NP model drives outer view
1-6 C141-E185
(1) Disks
The disks have an outer diameter of 70 mm (2.8 inch) and an inner diameter of 25 mm (0.98 inch)
for MAS series. The disks are good for at least 20,000 contact starts and stops. Each model
contains following number of disks.
(2) Heads
The MR (Magnet - Resistive) of the CSS (contact start/stop) type heads are in contact with the
disks when the disks are not rotating, and automatically float when the rotation is started. Figure
1.3 shows the configuration of disks and heads
MAS3735NC/NP: 4
MAS3367NC/NP: 2
MAS3184NC/NP: 1
Base
Cover
(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.
MAS3735NC/NP
0
1
2
3
4
5
6
7
Figure 1.3 Disk/head configuration
MAS3367NC/NP
0
1
2
3
MAS3184NC/NP
0
1
(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 is controlled and positioned via feedback of
servo information in the data.
The heads are positioned on the CCS zone over the disks when the power is off or the spindle
motor is stopped.
C141-E185 1-7
(5) Air circulation (recirculation filter, breather filter)
The disk enclosure (DE) configures a clean room to keep out particle and other contaminants. The
DE has a closed-loop air recirculation system. Using the movement of the rotating disks, air is
continuously cycled through a filter. This filter will trap any particle floating inside the enclosure
and keep the air inside the DE contaminant free. To prevent negative pressure in the vicinity of the
spindle when the disks begin rotating, a breather filter is attached. The breather filter also
equalizes the internal air pressure with the atmospheric pressure due to surrounding temperature
changes.
(6) Read/write circuit
The read/write circuit utilizes a read channel mounted with a head IC that supports high-speed
transmission and an MEEPR4ML (Modified Enhanced Extended Partial Response Class 4
Maximum Likelihood) modulation/demodulation circuit in order to prevent errors being triggered
by external noise and to improve data reliability.
(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.
1-8 C141-E185
1.3 System Configuration
Figure 1.4 shows the system configuration. The IDDs are connected to the SCSI bus of host
systems and are always operated as target. The IDDs perform input/output operation as specified
by SCSI devices which operate as initiator.
SCSI bus
(#14)
(#15)
Figure 1.4 System configuration
C141-E185 1-9
(1) SCSI bus configuration
Up to eight SCSI devices operating as an initiator or a target can be connected to the SCSI bus for
the 8-bit SCSI and up to 16 SCSI devices operating as an initiator or a target can be connected to
the SCSI bus for the 16-bit SCSI in any combination.
For example, the system can be configured as multi-host system on which multiple host computers
that operate as initiator or connected through the SCSI bus.
Using disconnect/reconnect function, concurrent input/output processing is possible on multi-SCSI
devices.
(2) Addressing of peripheral device
Each SCSI device on the bus has its own unique address (SCSI ID:#n in Figure 1.4). For
input/output operation, a peripheral device attached to the SCSI bus that operates as target is
addressed in unit called as logical unit. A unique address (LUN: logical unit number) is assigned
for each logical unit.
The initiator selects one SCSI device by specifying that SCSI ID, then specifies the LUN to select
the peripheral device for input/output operation.
The IDD is constructed so that the whole volume of disk drive is a single logical unit, the
selectable number of SCSI ID and LUN are as follows:
• SCSI ID: 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)
1-10 C141-E185
CHAPTER 2 SPECIFICATIONS
2.1 Hardware Specifications
2.2 SCSI Function Specifications
This chapter describes specifications of the IDD and the functional specifications of the SCSI.
2.1 Hardware Specifications
2.1.1 Model name and order number
Each model has a different recording capacities and interface connector type when shipped. Table
2.1 lists the model name and order number.
The data format can be changed by reinitializing with the user's system.
Table 2.1 Model names and order numbers
Model name Order number SCSI type
MAS3735NC CA06227-B400 SCA2, LVD
MAS3735NP CA06227-B460 68-pin, LVD
MAS3367NC CA06227-B200 SCA2, LVD
MAS3367NP CA06227-B260 68-pin, LVD
MAS3184NC CA06227-B100 SCA2, LVD
MAS3184NPCA06227-B16068-pin, LVD
Capacity
(user area)
73.49 GB 4 8
36.77 GB 2 4
18.37 GB 1 2
Number of
disks
Number
of heads
C141-E185
2-1
2.1.2 Function specifications
Table 2.2 shows the function specifications of the IDD.
Table 2.2 Function specifications
Item
MAS3735NC/NP MAS3367NC/NP MAS3184NC/NP
Specification
Formatted capacity/device (*1) 73.49 GB 36.77 GB 18.37 GB
Number of disks 4 2 1
Number of heads 8 4 2
Number of cylinders (*2) 27,094 27,150 27,206
Formatted capacity/track (B) 285,696 to 360,960
Number of rotations min-1 (rpm) 15,000 ± 0.2%
Average latency time 2.00 msec
Seek time (*3)
(Read/Write)
Start/stop time
(*4)
Track to Track
Average
Full stroke
Start time
Stop time
0.3 ms/0.5 ms
3.3 ms/3.8 ms
8.0 ms/9.0 ms
30 s typ. (60 s max.)
30 s typ.
Recording mode 32/34 MEEPRML
External
dimensions
Height:
Width:
Depth:
25.4 mm
101.6 mm
146.0 mm
Weight (max) 0.80 kg
Power consumption (*5) 11.5 W 8.7 W 7.5 W
Fast 5 SCSI Cable length: 6 m max
SingleEnded
Interface
LVD
Data
transfer
rate (*10)
Fast 10 SCSI Cable length: 3 m max
Fast 20 SCSI
U160
Disk drive
Synchronous
SCSI
mode
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)
93.11 to 118.22 MB/s
320 MB/s max.
Logical data block length (*11) 512 to 528 byte (Fixed length)
SCSI command specification
SPI-4 (T10/1365D Rev.7), SAM-2 (T10/1157D Rev.20),
SPC-2 (T10/1236D Rev.20), SBC (T10/996D Rev.8c)
Data buffer 8 MB FIFO ring buffer
Acostic noise (Ready) 3.6 Bels typ. (4.1 Bels max.)
2-2 C141-E185
(*1)
The formatted capacity can be changed by changing the logical block length and using spare sector
space. See Chapter 3 for the further information. The formatted capacity listed in the table is an
estimate for 512 bytes per sector.
(*2)
(*3)
The number of user cylinders indicates the max., and includes the alternate cylinder. The number
of user cylinders and alternate cylinders can be specified at format of the IDD.
The positioning time is as follows:
Seek tim [ms]
(*4)
(*5)
(*6)
(*7)
(*8)
(*9)
(*10)
(*11)
Seek Difference [2048 Cyl/div]
The start time is the time from power on or start command to when the IDD is ready, and the stop
time is the time for disks to completely stop from power off or stop command.
This value indicates at ready mode.
Up to 4 SCSI devices having capacitance of 25pF or less can use cable length of up to 3.0 m.
5 to 8 SCSI devices having capacitance of 25pF or less can use cable length of up to 1.5 m.
1 on 1 connection case.
1 host, 15 devices case.
The maximum data transfer rate may be restricted to the response speed of initiator and by
transmission characteristics.
The terminator power pin (SCSI connector) which supplies power to other terminators is not used.
C141-E185 2-3
2.1.3 Environmental specifications
Table 2.3 lists environmental and power requirements.
Table 2.3 Environmental/power requirements
Temperature
(*1)
Relative
humidity
Vibration
(*2)
Shock (*2)
(above sea
level)
Power
requirements
Input power
(*5)
Item
MAS3735NC/NP MAS3367NC/NP MAS3184NC/NP
Specification
Operating 5 to 55°C
Non-operating –40 to 70°C
Transport
(within a week)
DE surface temperature
at operating
–40 to 70°C
5 to 60°C
Gradient 15°C/h or less
Operating 5 to 95%RH
Non operating 5 to 95%RH
Transport
(within a week)
Maximum wet bulb
temperature
5 to 95%RH
29°C (no condensation)
Operating (*3) 0.3 mm (5 to 20Hz)/9.8 m/s2 (1G) (20 to 300 Hz) or less
Non-operating (*4) 3.1 mm (5 to 20Hz)/49m/s2 (5G) (20 to 300Hz) or less
Transport (packaged) 3.1 mm (5 to 20Hz)/49m/s
2
(5G) (20 to 300Hz) or less
Operating 637.4m/s2 (65G) (2 ms)
Non-operating 2451.7m/s2 (250G) (2 ms)
Transport (packaged) 2451.7m/s
2
(250G) (2 ms)
Operating –300 m to 3,000 mAltitute
Non-operating –300 m to 12,000 m
Ready
(Average)
0.75 A 0.52 A 0.42A
Peak within
+12 VDC
±5%
100 µs at
spin-up
Random
W/R
(about 80
3.0 A
1.0 A
IOPS)
Ready 0.5 A
+5 VDC
±5% (*6)
Random
W/R
(about 80
1.0 A
IOPS)
Ripple (*7) +5 V/+12 V 250 mVp-p
(*1)
(*2)
For detail condition, see Section 4.1.
Vibration applied to the drive is measured at near the mounting screw hole on the frame as much
as possible.
(*3)
At random seek write/read and default on retry setting with log sweep vibration.
2-4 C141-E185
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