Fujitsu MAS3367FC, MAS3735FC User Manual
C141-E198-02EN
MAS3735FC
MAS3367FC
DISK DRIVES
PRODUCT/MAINTENANCE MANUAL
FOR SAFE OPERATION
Handling of This Manual
This manual contains important info rmat ion for usi ng this produc t. Read thoroug hly befor e 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 product or system in accordance with the descriptions or instructions
contained herein; including any liability for incidental or consequential damages arising therefrom.
FUJITSU 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 (herea ft er ref e rred to as "miss ion -c ri tic al " use). Cust omers
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 Rights Reserved, Copyright FUJITSU LIMITED 2003
C141-E198
Revision History
(1/1)
Edition Date
01 2003.07.29 — —
02 2003.10.07
• Table 2.1, 2.2 and 3.2 are altered.
• Table 2.3 is altered
Revised section ( *1)
(Added/Deleted/Altered)
Details
Capacity notation is changed.
Misdescription is corrected.
*1 Section(s) with asterisk (*) refer to the previous edition when those were deleted.
C141-E198
This page is intentionally left blank.
Preface
This manual describes the MAS3735FC and MAS3367FC (hereafter, MAS series),
3.5 type fixed disk drives with an embedded fibre channel 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.
The organization of this manual, related reference manual and conventions for alert
messages follow.
Overview of Manual
This manual consists of the following seven chapters, glossary, and abbreviation:
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 Diagnosti cs 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.
C141-E198 i
Preface
APPENDIX A Connector Signal Allocation
The appendix gives supplementary information, including the signal assignments of
interface connectors.
Conventions for Alert Messages
This manual uses the following conventions to show the alert messages. An alert message
consists of an alert signal and alert statements. The alert signal consists of an alert symbol
and a signal word or just a signal word.
The following are the alert signals and their meanings:
This indicates a hazardous situation
serious personal injury
procedure correctly.
This indicates a hazardous situation
personal injury
correctly.
This indicates a hazardous situation
or
moderate personal injury
the procedure correctly. This alert signal also indicates
that damages to the product or other property,
the user does not perform the product correctly.
This indicates information that could help the user use the
product more efficiently.
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:
if the user does not perform the procedure
if the user does not perform the
if the user does not perform
likely
could
could
to result in
result in
result in
may
serious
minor
occur if
ii C141-E198
Preface
(Example)
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 × 4 ( 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.
The main alert messages in the text are also listed in the “Important Alert Items.”
CONVENTIONS USED IN THIS MANUAL
The MAS3735FC and MAS3367FC disk drives are described as "the intelligent disk drive
(IDD)", "the drive" or "the device" in this manual.
Attention
Decimal number is represented normally.
Hexadecimal number is represented as X'17B9', 17B9h or 17B9H.
Binary number is represented as "010".
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.
C141-E198 iii
This page is intentionally left blank.
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. Also, damage 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 immediat ely af t er
turning off the power.
×
4
2-5
5-1
C141-E198 v
Important Alert Items
Task Alert message Page
Mounting Installation Damage
1. When dismounting the drive which is mounted on the system
while power is supplied to it.
• The drive to be dismounted must be separated from the
• If the drive is not separated from the loop, issue an LPB to
• It is recommended to stop the spindle motor prior to this
• Then, dismount the drive using the drive
• When storing or transporting the drive, put it in an
5-5
loop. Dismounting the drive which is not separated from
the loop may cause an unexpected error.
the drive from the initiator in a primitive sequence of the
order set.
loop separation operation. The spindle motor can be
stopped by a START/STOP command. It takes about 30
seconds for the spindle motor to stop completely.
mounting/dismounting mechanism, etc. of the system. If
the drive is dismounted while the spindle motor is running,
special care is required to avoid excessive vibration or
shock to the drive. It is recommended to stop the operation
once the SCA connector breaks off contact and wait until
the spindle motor stops (about 30 seconds) before dismount
the drive.
antistatic bag. (Shown in Section 5.1).
2. When dismounting the drive which is mounted on the system
while power is not supplied to it.
• Do not move the drive until the drive stops completely
(about 30 seconds if the spindle motor was stopped by a
START/STOP UNIT command, and about 30 seconds after
powering-off when the power was simply turned off).
• Then, dismount the drive using the drive
mounting/dismounting mechanism, etc. of the system.
• When storing or transporting the drive, put it in an
antistatic bag. (Shown in Section 5.1).
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 injury, do not touch the mechanical assembly during
disk drive operation.
2. Do not use solvents to clean the disk drive.
6-4
6-5
vi C141-E198
Important Alert Items
Task Alert message Page
Mounting Installation
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. Do not remove a PCA. This operation is required to prevent
unexpected or unpredictable operation.
3. Do not use a conductive cleaner to clean a disk drive assembly.
Damage
Never open the disk enclosure in the field. Opening the disk
enclosure in the field may cause an irreparable fault.
Data loss
Save data stored on the disk drive before requesting repa ir. Fu jitsu
does not assume responsibility if data is destroyed during servicing
or repair.
Damage
Never open the disk enclosure in the field. Opening the disk
enclosure may cause an irreparable fault.
6-6
6-6
6-7
6-15
C141-E198 vii
This page is intentionally left blank.
MANUAL ORGANIZATION
PRODUCT/
MAINTENANCE MANUAL
(This manual)
Fibre Channel
Interface
Specifications
1. General Description
2. Specifications
3. Data Format
4. Installation Requirements
5. Installation
6. Diagnostics and Maintenance
7. Error Analysis
1. Command Processing
2. Data Buffer Management
3. Command Specification
4. Sense Data and error Recovery Procedure
5. Disk Medium Management
C141-E198 ix
REFERENCED STANDARDS
The product specifications and functions described in this manual conform to the
following ANSI (*1) standards:
Document number Title
NCITS TR-19 FIBRE CHANNEL PRIVATE LOOP SCSI DIRECT ATTATH (FC-PLDA)
ANSI X3.230-1994 FIBRE CHANNEL PHYSICAL AND SIGNALING INTERFACE (FC-PH)
ANSI X3.297-1996 FIBRE CHANNEL PHYSICAL AND SIGNALING INTERFACE-2 (FC-PH-2)
ANSI X3.272-199X FIBRE CHANNEL ARBITRATED LOOP (FC-AL)
ANSI X3.269-199X FIBRE CHANNEL PLOTOCOL FOR SCSI (SCSI-FCP)
*1 ANSI = American National Standards Institute
In case of conflict between this manual and any referenced document, this manual takes precedence.
x C141-E198
CONTENTS
CHAPTER 1 General Description..................................................................1-1
1.1 Standard Features....................................................................................1-2
1.2 Hardware Structure .................................................................................1-5
1.3 System Configuration..............................................................................1-7
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
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
C141-E198 xi
Contents
4.1.1 External dimensions..............................................................................4-1
4.1.2 Mounting...............................................................................................4-3
4.1.3 Notes on mounting ................................................................................4-3
4.2 Power Supply Requirements...................................................................4-7
4.3 Connection Requirements .......................................................................4-9
4.3.1 Connector ..............................................................................................4-9
4.3.2 Interface connector................................................................................4-9
CHAPTER 5 Installation................................................................................. 5-1
5.1 Notes on Handling Drives.......................................................................5-1
5.2 Setting......................................................................................................5-3
5.2.1 Loop ID setting......................................................................................5-3
5.2.2 Mode settings ........................................................................................5-3
5.3 Mounting Drives......................................................................................5-4
5.3.1 Mounting procedures.............................................................................5-4
5.4 Dismounting Drives.................................................................................5-5
5.5 Checking Operation after Installation and Preparing the IDD for Use...5-6
5.5.1 Checking initial operation.....................................................................5-6
5.5.2 Checking connection.............................................................................5-7
5.5.3 Formatting...........................................................................................5-10
5.5.4 Setting parameters...............................................................................5-12
5.6 Spare Disk Drive...................................................................................5-16
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
xii C141-E198
Contents
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
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), (B-47-xx), (B-49-00), (B-4D-xx) and
(B-4E-00): fibre channel interface error...............................................7-4
APPENDIX A Connector Signal Allocation ................................................... A-1
A.1 Interface (FC-SCA) Connector Signal Allocation.................................A-2
Glossary...........................................................................................................GL-1
Abbreviation.....................................................................................................AB-1
Index ................................................................................................................. IN-1
C141-E198 xiii
Contents
Illustrations
Figures
Figure 1.1 FC model drives outer view........................................................1-5
Figure 1.2 Disk/head configuration..............................................................1-6
Figure 1.3 Example of FC-AL system configuration...................................1-7
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 .......3-12
Figure 3.8 Alternate block allocation by REASSIGN
BLOCKS command ..................................................................3-13
Figure 4.1 External dimensions....................................................................4-2
Figure 4.2 IDD orientations..........................................................................4-3
Figure 4.3 Mounting frame structure............................................................4-4
Figure 4.4 Limitation of side-mounting .......................................................4-4
Figure 4.5 Surface temperature measurement points...................................4-5
Figure 4.6 Service clearance area.................................................................4-6
Figure 4.7 Current waveform (+12 VDC)....................................................4-7
Figure 4.8 AC noise filter (recommended)...................................................4-8
Figure 4.9 Connector location ......................................................................4-9
Figure 4.10 SCA2 type connector ................................................................4-10
Figure 5.1 Checking the IDD connection (A) ..............................................5-8
Figure 5.2 Checking the IDD connection (B)...............................................5-9
Figure 6.1 Revision label (example) ............................................................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
xiv C141-E198
Contents
Tables
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 3.1 Zone layout and track capacity...................................................3-3
Table 3.2 Format capacity...........................................................................3-9
Table 4.1 Surface temperature check point ................................................ 4-5
Table 5.1 Motor start mode......................................................................... 5-3
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 FC-SCA connector: CN1.......................................................... A-2
C141-E198 xv
This page is intentionally left blank.
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 Fibre-Channel
controller.
The interface used to connect the MAS series disk drives to the host system complies with NCITS TR-19
Fibre Channel Private Loop SCSI Direct Attach (FC-PLDA), which is the Fibre Channel PLDA standard
covering items ranging from Fibre Channel physical layers to SCSI command protocols.
The high-speed data transfer and long-distance transmission capabilities of Fibre Channel technology and the
powerful command set of the MAS disk driver facilitate creation of high-performance and highly reliable disk
subsystems with large storage capacities.
The data format can be changed from the format at factory shipment by re-initializing with the use's system.
Refer to the Fibre Channel Interface Specification.
C141-E198 1-1
General Description
1.1 Standard Features
(1) Compactness
In a compact enclosure having the 3.5-inch HDD form factor, the IDD contains an FC-AL controller,
which supports the Arbitrated Loop technology (FC-AL), a Fibre Channel technology defined by the
related ANSI standard.
(2) FC-AL standard
The IDD provides not only FC-AL 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) Dual-port support
The IDD has two pairs of driver and receiver sets for the Fibre Channel to support dual-port
connection.
(4) High-speed data transfer
The maximum data-transfer speed on the Fibre Channel loop is 212.5 MB/s. The large-capacity data
buffer of the IDD enables the effective use of such high-speed data transfers available on the Fibre
Channel loop.
(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 32M bytes. Data is transferred between Fibre Channel Loop 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 Fibre Channel Loop 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 Fibre Channel Loop regardless of actual data transfer rate of the disk drive.
1-2 C141-E198
1.1 Standard Features
(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.
When Write Cache is enabled, you should ensure that the cached data is
surely flushed to the disc media befo re you turn off the drive'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.
(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) Enclosure service function
The IDD supports the enclosure service interface (ESI), which complies with SFF-8067. The ESI
interface enables use of the SCSI-3 enclosure service command set (SES) so that the functions that
specify and read enclosure service information can be used.
(11) Error recovery
The IDD can try to recover from errors in Fibre Channel Loop 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.
C141-E198 1-3
General Description
(12) Automatic alternate block reassignment
If a defective data block is detected during read or write the IDD can automatically reassign its
alternate data block.
(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.
Error rate increase
1. The drive format at factory shipment is generally 512 bytes.
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 here is sense data (1-13-xx).
(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.
(16) Large capacity
A large capacity can be obtained from 3.5 type 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.
(17) Start/Stop of spindle motor
Using the SCSI command, the host system can start and stop the spindle motor.
(18) Diagnosis
The IDD has a diagnostic capability which checks internal controller functions and drive operations
to facilitate testing and repair.
1-4 C141-E198
1.2 Hardware Structure
(19) 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.
(20) 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.
(21) Microcode downloading
The IDD implements the microcode download feature. This feature achieves easy maintainability of
the IDD and function enhancing.
1.2 Hardware Structure
An outer view of the IDD is given in Figures 1.1. 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 preamp with the printed circuit assembly (PCA) of the controller.
Figure 1.1 FC model drives outer view
(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.
MAS3735FC: 4
MAS3367FC: 2
C141-E198 1-5
General Description
(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 1.2 shows
the configuration of disks and heads
(3) Spindle motor
Base
Cover
MAS3735FC
0
1
2
3
4
5
6
7
Figure 1.2 Disk/head configuration
MAS3367FC
0
1
2
3
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 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 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.
(5) Air circulation (recirculation filter, breather filter)
The disk enclosure (DE) configures a clean room to keep out particles 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 particles 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.
1-6 C141-E198
1.3 System Configuration
(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.
1.3 System Configuration
For the Fibre Channel, the ANSI standard defines Arbitrated Loop, Fabric, and Point-to-Point
technologies. The MAS series disk drives support the Arbitrated Loop technology. Figure 1.3 gives
an example of the FC-AL system configuration.
Initiator
(Node-1)
Port B
Port A
BC
BC
BC
BC
Drive
(Node-4)
Port B
Port A
BC
BC
BC
BC
Port B
Drive
(Node-2)
Port A
Port B
Drive
(Node-3)
Port A
Figure 1.3 Example of FC-AL system configuration
Any device connected to the Fibre Channel is called a node. The nodes shown in Figure 1.3
represent the initiator and individual disk drives. Each node has at least one port called an N_port.
For FC-AL, each port is called a Node-Loop port (NL_port).
The MAS series disk drive has two ports, one of which is used for connections to an FC-AL. A
maximum of 126 NL_ports can be connected to a single port.
C141-E198 1-7
General Description
(1) Loop configuration
A port embedded with sending and receiving circuits uses differential signals to send and receive data
on electric signal lines. A pair of signal lines is called a link. Since signals are sent in one direction
on a link, the links in a system must be connected to form a loop. The FC-AL interface sends and
receives data via nodes on the loop. Therefore, if a node connected to a loop is powered off or the
interface signals of a node cannot be sent or received correctly, the loop does not work normally. A
common solution preventing this problem from occurring is to add a port bypass circuit on the back
plane of the system. BC in Figure 1.3 indicates the port bypass circuit.
(2) Node addressing
A specific device number called a SEL ID is assigned to each node on a Fibre Channel loop. The
combination of signal levels on the back plane is used to define the SEL ID of a disk drive. The
signal levels are sent on the seven signals (from SEL_0 to SEL_6) from CN1, which serves as an
SCA interface connector. SEL_6 is the most significant bit (MSB), having a bit weight of the sixth
power of 2, and SEL_0 is the least significant bit (LSB), having a bit weight of the zeroth power of 2.
Any number from 0 (X’00) to 125 (X’7D’) can be assigned as the SEL ID of a disk drive.
1-8 C141-E198
CHAPTER 2 Specifications
2.1 Hardware Specifications
This chapter describes specifications of the IDD.
2.1 Hardware Specifications
2.1.1 Model name and order number
Each model has a different recording capacities 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 Interface type
MAS3735FC CA06244-B400 SCA2, FC-AL 73.49 GB (*) 4 8
MAS3367FC CA06244-B200 SCA2, FC-AL 36.77 GB (*) 2 4
Capacity
(user area)
Number of disks
(*) 1GB = 1,000,000,000 bytes
Number of
heads
C141-E198 2-1
Specifications
2.1.2 Function specifications
Table 2.2 shows the function specifications of the IDD.
Table 2.2 Function specifications
Item
Specification
MAS3735FC MAS3367FC
Formatted capacity/device (*1) 73.49 GB (*6) 36.77 GB (*6)
Number of disks 4 2
Number of heads 8 4
Number of cylinders (*2) 27,094 27,150
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 0.3 ms/0.5 ms
Average 3.3 ms/3.8 ms
Full stroke
Start time
Stop time
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) 0.80kg
Power consumption (*5) 13.0 W 10.2 W
Interface Cable length: 30 m max
Disk drive 93.11 to 118.22 MB/s Data
transfer
rate
FC-AL 212.5 MB/s max.
Logical data block length 512 to 528 byte (Fixed length)
FC-PLDA (NCITS TR-19),
Command specification
FC-PH (ANSI X3.230-1994), FC-PH-2 (ANSI X3.297-1996),
FC-AL (ANSI X3.272-199X), SCSI-FCP (ANSI X3.269-199X)
Data buffer 32 MB FIFO ring buffer (*7)
Acostic noise (Ready) 3.6 Bels typ. (4.1 Bels max.)
(*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) 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.
(*3) The positioning time is as follows:
2-2 C141-E198
Loading...