C141-F055-01EN
MHR2040AT, MHR2030AT
MHR2020AT, MHR2010AT
DISK DRIVES
MAINTENANCE MANUAL
Revision History
(1/1)
Edition
01
Date
Revised section (*1)
(Added/Deleted/Altered)
Details
—
2001-09-17
—
*1 Section(s) with asterisk (*) refer to the previous edition when those were deleted.
C141-F055-01EN
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Preface
This manual describes the MHR2040AT, MHR2030AT, MHR2020AT and MHR2010AT 2.5-inch
hard disk drives with a built-in controller that is compatible with the ATA interface.
This manual explains, in detail, how to maintain the disk drives.
This manual assumes that users have a basic knowledge of hard disk drives and their application in
computer systems.
This manual consists of the following two chapters:
Overview of Manual
CHAPTER 1
Maintenance and Diagnosis
This chapter explains MHR2040AT, MHR2030AT, MHR2020AT and
MHR2010AT maintenance requirements, operation verification, and
troubleshooting.
CHAPTER 2
Removal and Replacement Procedure
This chapter explains the procedure for removing and replacing MHR2040AT,
MHR2030AT, MHR2020AT and MHR2010AT.
Abbreviations
This section lists the abbreviated terms and their full words used in this manual.
Index
In this manual, disk drives may be referred to as drives, or devices.
IBM PC-AT is a registered trademark of IBM (International Business Machines
Corporation) of the United States of America.
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 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.
C141-F055-01EN
i
Preface
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:
(Example)
Don’t install or remove a PCA or connect or disconnect a cable or
connector plug when the drive is powered. This may give you an
electric shock.
The main alert messages in the text are also listed in the “Important Alert Items.”
Operating Environment
This product is designed to be used in offices or computer rooms.
For details regarding the operating environment of use, refer to the
(Cnnn-Xnnn) and the
(Cnnn-Xnnn).
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.
Liability Exception
“Disk drive defects” refers to defects that involve adjustment, repair, or
replacement.
Fujitsu is not liable for any other disk drive defects, such as those caused by user
misoperation or mishandling, inappropriate operating environments, defects in the
power supply or cable, problems of the host system, or other causes outside the
disk drive.
ii
C141-F055-01EN
Important Alert Items
Important Alert Messages
The important alert messages in this manual are as follows:
This manual uses the key alert messages given below.
The following manual also contains notes on safety precautions:
A hazardous situation could result in minor or moderate personal
injury if the user does not perform the procedure correctly. Also,
damage to the predate or other property, may occur if the user does
not perform the procedure correctly.
Task
Maintenance
Alert message
Page
Static, Damage
1. Don’t install or remove a PCA or connect or disconnect
a cable or connector plug when the drive is powered.
This may give you an electric shock.
1-2
2. Keep away from mechanical assemblies in the unit
during operation. This may cause injuries.
3. Avoid dangerous detergent when the disk drive is
cleaned.
C141-F055-01EN
iii
Important Alert Items
Task
Maintenance
Alert message
Page
Device damage
1. Before touching a PCA or the drive, wear a wrist strap
and perform the human body grounding to discharge
static electricity from your body. This will prevent
irreparable damage to the PCA and the head of the drive.
1-2
2. Don’t install or remove a PCA or connect or disconnect
a cable or connector plug when the drive is powered.
This will prevent electrical damage to the disk drive.
3. Operating the disk drive with one or more PCA missing
will be unpredictable. Only power the drive with all
boards installed.
4. Avoid any detergent which may cause short circuits
when cleaning assemblies.
5. Keep all vents open opened and unblocked. Avoid other
conditions which may cause circuits to overheat.
6. A ribbon type cable has one line marked. Ensure that
this line is always connected to pin 1 of the cable
connector.
7. Do not apply excessive force to the cover under any
circumstances. Doing so may cause irreparable damage
to the cover.
Device damage
The DE is completely sealed. Do not open the DE in the
field.
1-3
1-4
Data corruption
When asking for repair, save all data stored in the disk drive
beforehand. Fujitsu Limited is not responsible for any loss
of data during service and repair.
Device damage
The disk enclosure must never to be opened in the field.
Opening the disk enclosure may cause irreparable damage.
1-13
iv
C141-F055-01EN
Important Alert Items
Task
Alert message
Damage or Device damage
Page
2-2
Maintenance
1. Perform any removal after the system power is
completely disconnected. The cable must not be
disconnected and the screws that attach the drive must
not be removed with the power ON.
2. Do not move the drive until it comes to a complete stop
(about 30 s after the power is turned OFF).
3. Perform the human body grounding to discharge any
static electricity from your body.(Be sure to wear a wrist
strap)
C141-F055-01EN
v
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Manual Organization
MHR2040AT, MHR2030AT,
MHR2020AT, MHR2010AT
1. Device Overview
2. Device Configuration
3. Installation Conditions
4. Theory of Device Operation
5. Interface
DISK DRIVES
PRODUCT MANUAL
(C141-E145EN)
6. Operations
MHR2040AT, MHR2030AT,
MHR2020AT, MHR2010AT
1. Maintenance and Diagnosis
2. Removal and Replacement Procedure
DISK DRIVES
MAINTENANCE MANUAL
<This manual>
C141-F055-01EN
vii
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Contents
CHAPTER 1 Maintenance and Diagnosis..................................................... 1-1
1.1
Maintenance 1-2
1.1.1 Rules for maintenance 1-2
1.1.2 Maintenance requirements 1-3
1.1.3 Maintenance levels 1-5
1.1.4 Disk drive revision number 1-6
1.1.5 Tools and test equipment 1-8
1.1.6 Self-diagnostics 1-8
1.1.7 Test 1-8
1.2
Operation Confirmation 1-10
1.2.1 Operation test 1-10
1.2.2 Diagnostic test 1-11
1.3
Troubleshooting Procedure 1-11
1.3.1 Troubleshooting procedure 1-11
1.3.2 Troubleshooting disk drive replaced in field 1-11
1.3.3 Troubleshooting at factory 1-13
CHAPTER 2 Removal and Replacement Procedure ................................... 2-1
2.1
2.2
Spare Parts 2-2
Disk Drive Removal 2-2
C141-F051-01EN
ix
Contents
Illustrations
Figures
Tables
Figure 1.1 Disk drive revision number label 1-6
Figure 1.2 Display of disk drive revision number 1-7
Figure 1.3 Test flowchart 1-9
Table 1.1 Status register contents 1-10
Table 1.2 Disposition for error register contents 1-10
Table 1.3 System level and field troubleshooting 1-12
Table 2.1 Model and parts numbers 2-2
x
C141-F051-01EN
CHAPTER 1 Maintenance and Diagnosis
1.1
1.2
1.3
Maintenance
Operation Confirmation
Troubleshooting Procedure
This chapter describes the maintenance, diagnosis, operation check, and
troubleshooting of the disk drive. The following are explained:
•
•
•
•
•
•
Rules for regular maintenance and troubleshooting
Display of maintenance level (field and factory)
Display of machine revision number and number change in the field
Tools and test devices needed for each maintenance level
Standard testing for each maintenance level
Recommended procedure for troubleshooting and fault diagnosis
C141-F055-01EN
1-1
1.1 Maintenance
Maintenance and Diagnosis
1.1 Maintenance
1.1.1 Rules for maintenance
The following cautions must be observed to prevent injury during troubleshooting
or maintenance.
Static, Damage
1. Don’t install or remove a PCA or connect or disconnect a cable
or connector plug when the drive is powered. This may give
you an electric shock.
2. Keep away from mechanical assemblies in the unit during
operation. This may cause injuries.
3. Avoid dangerous detergent when the disk drive is cleaned.
The following cautions must be observed to avoid damaging the disk drive during
troubleshooting and maintenance.
Device damage
1. Before touching a PCA or the drive, wear a wrist strap and
perform the human body grounding to discharge static
electricity from your body. This will prevent irreparable
damage to the PCA and the head of the drive.
2. Don’t install or remove a PCA or connect or disconnect a cable
or connector plug when the drive is powered. This will prevent
electrical damage to the disk drive.
3. Operating the disk drive with one or more PCA missing will be
unpredictable. Only power the drive with all boards installed.
4. Avoid any detergent which may cause short circuits when
cleaning assemblies.
5. Keep all vents open opened and unblocked. Avoid other
conditions which may cause circuits to overheat.
6. A ribbon type cable has one line marked. Ensure that this line
is always connected to pin 1 of the cable connector.
7. Do not apply excessive force to the cover under any
circumstances. Doing so may cause irreparable damage to the
cover.
1-2
C141-F055-01EN
Maintenance and Diagnosis
1.1 Maintenance
1.1.2 Maintenance requirements
(1) Preventive maintenance
The disk drive needs no preventive maintenance, not even the air filter needs to be
changed.
Device damage
The DE is completely sealed. Do not open the DE in the field.
(2) Service life
In situations where management and handling are correct, the life of the disk drive
is five years when the DE surface temperature is less than 48°C. When the DE
surface temperature exceeds 48°C, the life is five years or 20,000 hours of
operation, whichever occurs first. Refer to Section 1.7 and 3.2 in Product
Manual.
(3) Exchangeable parts in field
The PCA and the DE cannot be replaced separately in the field. Replace the
whole disk drive.
(4) Service system and repair
Fujitsu Limited has a disk drive service system and repair facility. When making
a request for repair or parts replacement, you should provide related information
usually including:
a) Model name of disk drive, part number (P/N), disk drive revision number,
manufacture serial number (S/N), and date of manufacture of the disk drive
b) Circumstances when the fault occurred
−
−
−
Date of trouble occurred
System configuration
Environmental conditions (including temperature, humidity, and voltage)
c) Fault history of the drive
d) Details of the fault
−
−
−
−
−
Description of the fault
Issued command and specified parameters
Status (Status/Error register)
Interval of the fault
Other information for fault diagnosis
C141-F055-01EN
1-3
1.1 Maintenance
Maintenance and Diagnosis
Data corruption
When asking for repair, save all data stored in the disk drive
beforehand. Fujitsu Limited is not responsible for any loss of data
during service and repair.
(5) Notes on handling
a.
General notes
a) Vibrations and shocks more severe than allowed will cause fatal damage to
the device so be very careful. Be especially careful when unpacking the
device.
b) Do not leave the device in a dusty environment.
c) Because the device uses GMR (giant MR head) and static sensitive CMOS
semiconductors take the following precautions, be careful of the handling on
the following points after the device is unpacked.
−
Use an antistatic mat, etc. in the environment for handling the
equipment. The worker should also be physically grounded (e.g.,
wearing a wrist strap).
−
Hold by the DE section, do not directly touch the PCA unit
unnecessarily.
b.
Unpacking
a) Use a flat workplace, find which side of the pack is up and be careful not to
have the wrong side facing upwards. Do not place the device directly on a
hard table, place it on something soft such as a rubber mat.
b) Be careful not to apply any excessive force to the packed device when
removing the shock absorbing material.
c) When taking the device out of the antistatic bag, be especially careful not to
apply any excessive force to the PCA or to the interface connector section.
d) Never ever remove the DE seal label and screws and the DE cover.
c.
Installation
a) When the power is ON, do not change the switch setting, or connecting, or
disconnecting connectors.
b) Do not move the device or disconnect connectors with the power ON or until
the disk drive unit comes to a complete stop after the power is turned OFF
(about 30 seconds).
d.
Packaging
a) Place the device in an antistatic vinyl bag along with a desiccant (silica gel).
1-4
C141-F055-01EN
Maintenance and Diagnosis
1.1 Maintenance
b) It is recommended that you use the shock absorption cushion material and
packaging that contained the device when it was delivered by Fujitsu.
If the same packaging material cannot be used, use a shock absorbent box
that will transmit shocks directly to the device. When using this type of box,
adequately protect the PCA surface and interface connector section.
c) Place a label showing which side is up and clearly stating the notes on
handling on the outside of the packaging.
e.
Delivery
a) As a rule, deliver as it is packaged and keep the up side up.
b) If delivering a single drive after it is unpacked, take it only a short distance.
Also, use shock absorbent material to protect it against shock and vibration.
Deliver an unpacked device in either of the allowable packed positions.
Refer to Section 3.2 of the MHR2040AT, MHR2030AT, MHR2020AT,
MHR2010AT Disk Drives Product Manual.
f.
Storage
a) Store in dampproof packaging.
b) Take care that the environmental requirements satisfy the non-operating
environmental specifications described in Section 1.4 of the MHR2040AT,
MHR2030AT, MHR2020AT, MHR2010AT Disk Drives Product Manual.
c) To prevent condensation, do not subject the device to sudden changes of
temperature.
1.1.3 Maintenance levels
Because of its compact size and special repair requirements, it is recommended
that the whole disk drive be replaced. This section describes maintenance on two
levels.
(1) Field maintenance (disk drive replacement)
Replacement at the user site.
•
•
•
Disk drive replacement requires ordinary tools.
Usually, the user, retailer, seller, or OEM trader will replace the drive.
(2) Factory maintenance (parts replacement)
•
•
Only Fujitsu can perform maintenance at this level.
This includes maintenance training and assisting other OEM traders. The
OEM trader usually assists the retailer and seller.
•
Use the factory level tools and test equipment. This includes recommended
spare parts and repairing or replacing various parts.
C141-F055-01EN
1-5
1.1 Maintenance
Maintenance and Diagnosis
1.1.4 Disk drive revision number
The disk drive revision number is a single alphabetic character followed by a
single alphanumeric character. It is stuck on the DE and marked on the revision
number label. Figure 1.1 shows the disk drive revision number label format.
Disk drive revision number
Firmware code/revision
Figure 1.1 Disk drive revision number label
(1) Revision number marking at delivery
The machine revision number is indicated by crossing out up to the relevant
number in the relevant alphabetic character row using = marks (see Figure 1.2).
(2) Revision number change in the field
When a part is replaced in the field or other modifications are made, the machine
revision number may need to be changed. The level is indicated by crossing out
the relevant number in the relevant alphabetic character row using ¡ marks (see
Figure 1.2).
(3) Firmware code and revision
First 2-digit indicates a firmware code and rest 2-digit indicates its revision.
Note:
For a change of revision number after delivery, Fujitsu issues a
“Change Request/Notice” and the disk drive revision number after
the change. When a change is made at the user site, the revision
number level should be changed as described above.
1-6
C141-F055-01EN
Maintenance and Diagnosis
1.1 Maintenance
Revision number mark when delivered
A2 Revision
Revision number change in the field
A3 Revision
Figure 1.2 Display of disk drive revision number
C141-F055-01EN
1-7
1.1 Maintenance
Maintenance and Diagnosis
1.1.5 Tools and test equipment
At the field maintenance level, only ordinary hand tools are required for
troubleshooting and repairing the disk drive. Special tools and test equipment is
not required.
Factory level tools and test equipment are beyond the scope of this manual.
1.1.6 Self-diagnostics
The disk drive has the following self-diagnostics. These self-diagnostics allow
normal basic operation of an isolated disk drive can be checked.
•
•
Initial self-diagnostics
Offline self-diagnostics (EXECUTE DRIVE DIAGNOSTIC [DIAGNOSTIC]
command)
1.1.7 Test
The disk drive test can be divided into the following three levels.
•
•
Operating test (See Subsection 1.2.1, “Operating test.”)
Diagnostic test (See Subsection 1.2.2, “Diagnostic test.”)
Figure 1.3 shows the relationship between the test level and troubleshooting.
Tables 1.1 and 1.2 show the check contents.
1-8
C141-F055-01EN
Maintenance and Diagnosis
1.1 Maintenance
Start
Yes
Check the host system
(Table 1.1)
Operation test with the
host computer or test
equipment
No
Analyze the system
related failure
System normal?
Yes
Disk drive
replacement or repair
No
Test acceptable?
Yes
No
Disk drive normal?
Yes
Continue with the
operation
Diagnostic test with
the host computer or
test equipment
No
Test acceptable?
Yes
Test using voltage or
temperature stress
No
Disk drive failure
analysis (Table 1.2)
Test acceptable?
Yes
No failure
Figure 1.3 Test flowchart
C141-F055-01EN
1-9
1.2 Operation Confirmation
Maintenance and Diagnosis
Table 1.1 Status register contents
Status bit
Contents
BIT0=1
BIT1, 2
BIT3=1
BIT4=1
BIT5=1
BIT6=0
BIT7=1
Shown in Table 1.2
Normal.
(1) Check whether vibration is transmitted because of the way the disk drive
is mounted.
(2) Check the power, cable, and connector.
(3) If it is concluded that the disk drive is the cause, replace the disk drive.
Table 1.2 Disposition for error register contents
Error bit
Method of disposition
BIT0
BIT1
BIT4
BIT6
If it is concluded that the disk drive is the cause, replace the drive.
BIT2
BIT7
(1) Check the status of the host, cable, and drive.
(2) If it is concluded that the disk drive is the cause, replace the drive.
1.2 Operation Confirmation
1.2.1 Operation test
When the host computer is processing data, the disk drive monitors disk drive
operation errors including data, command, and seek errors. The host is notified of
the error that the disk drive detected and the user is notified of its result.
The user may notice intermittent and indefinite failures such as overlong
execution time, abnormal noise, abnormal odor, or failures in particular processes.
The failure reported in the operation test will need further investigation. To
ascertain the cause of the disk drive failure reported, the disk drive can be
replaced. Failures in the operation test are often not caused by the host system.
For example, not having enough power supply reserve, a loose cable connection,
no timing and mechanical reserves, or relationship with other systems.
In normal operation, the disk drive itself or the host determines the processing
(return or halt) following the detected failure state.
1-10
C141-F055-01EN
Maintenance and Diagnosis
1.3 Troubleshooting Procedure
To troubleshoot the failure reported in the test at this level, accurately reproduce
the condition that caused the failure. Then, by replacing the disk drive, try to
separate the fault from the other sections of the disk drive host system.
1.2.2 Diagnostic test
The diagnostic test is used to separate a confirmed disk drive failure to a disk
drive subassembly or to check the disk drive performance. A test of this level
usually includes a specific disk drive function or concentrated execution of a
group of functions. The test is usually performed by a factory engineer and not
where the failure was reported. The disk drive is tested using another host
computer or test equipment.
To troubleshoot the disk drive failure in the diagnostic test, the engineer will
reproduce the failure condition. The engineer then isolates the failure to a
subassembly or part of the disk drive.
The procedures used in a test of this level great depend on the test equipment
used. It is beyond the range of this manual.
1.3 Troubleshooting Procedure
1.3.1 Troubleshooting procedure
This section describes the troubleshooting procedures for a disk drive failure at
field maintenance level described in Subsection 1.1.3.
In this section, troubleshooting is made to isolate the reported failure to the disk
drive or a host system. Usually, troubleshooting is necessary only when a cause
of failure is uncertain or unknown. When a cause of failure is clear (for example,
abnormal sound in the DE or burnt parts on the PCA), a level of troubleshooting
is low.
1.3.2 Troubleshooting disk drive replaced in field
It is recommended that the whole drive be replaced in maintenance of this level.
If replacing the drive corrects the fault, return the old drive to the factory for
testing and repair. If the new drive shows the same fault as the one that was
removed, the failure is elsewhere in the system.
System level troubleshooting, shown in Table 1.3, is performed at the user site to
isolate the reported failure to the disk drive or system.
C141-F055-01EN
1-11
1.3 Troubleshooting Procedure
Maintenance and Diagnosis
Table 1.3 System level and field troubleshooting
Recommended work
Check to be made
DC power voltage
level
Confirm that the DC power voltage is within ±5% of the standard value.
When measured at pins 41 and 42 of the power supply connector, the +5
VDC must be 4.75 to 5.25 VDC.
DC power ripple
noise
Check that the maximum ripple at +5 VDC power is less than 100 mV
peak to peak and 200 mV peak to peak respectively.
Power-interface
cable connection
Confirm that the AT interface cable is properly connected at the disk
drive, power supply section, and control unit.
Switch setting
System cable
Confirm that the switch on the disk drive control PCA is set for normal
operation with the host computer. Refer to Section 3.4 of the the
MHR2040AT, MHR2030AT, MHR2020AT, MHR2010AT Disk Drives
Product Manual for switch setting.
Confirm that all cable connections throughout the system correctly
connected.
System diagnostic To further isolate the failure, if it can be done, execute the system level
test
diagnostic routine described in the host computer manual.
Intermittent or
indefinite error
Check the AC voltage level at the power supply section and recheck the
DC voltage level at the disk drive power supply connector.
If the AC voltage level is abnormal, or if there is a lot of electrical noise,
notify the user.
If the DC voltage level is unstable, replace the power supply section.
If possible, replace the disk drive. If the fault remains, the disk drive is
not the case. For suggestions to isolate the failure further, refer to the
hardware and software manuals provided with the system.
1-12
C141-F055-01EN
Maintenance and Diagnosis
1.3 Troubleshooting Procedure
1.3.3 Troubleshooting at factory
When the trouble is recovered by replacing the drive at field (Subsection 1.3.2),
troubleshoot the replaced drive to isolate the trouble to the subassembly parts.
To shorten the troubleshooting time and repairing time, gather the data, such as
environmental data and other information, from the user and then return the failed
drive to the factory with the media defect list to repair.
At the factory, user environment is made and a reappearance test is performed.
To reappearance a same trouble at user, the failed drive is connected to the host
system. If no trouble occurs by the normal test, the reappearance test is
performed by adding the voltage/temperature load using a disk drive tester or
tools according to the user environment.
When a trouble reappeared, troubleshoot the cause of failure. Then, replace the
failed unit or parts.
As this level maintenance is made by a factory, this maintenance level is beyond
the scope of this manual.
Device damage
The disk enclosure must never to be opened in the field. Opening
the disk enclosure may cause irreparable damage.
C141-F055-01EN
1-13
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CHAPTER 2 Removal and Replacement Procedure
2.1
2.2
Spare Parts
Disk Drive Removal
This chapter explains the procedure for removing and replacing the disk drive. It
is assumed that the reader has a thorough knowledge of replacing the complete
disk drive and replacing the power-interface cable.
When carrying out these procedures, note the following items.
•
Be sure to wear a wrist strap when removing the disk drive from the host
system.
•
•
•
The disk drive must have been removed from the host system.
A power-interface cable to the disk drive must be disconnected.
Mounting is done by reversing the steps for removal.
To carry out maintenance properly, observe the following:
•
Place removed screws and other parts where they will not get lost or
damaged.
•
•
•
Keep a record of all maintenance work.
Tighten screws securely but not excessively.
Before touching the PCA, perform the FG (frame ground) to discharge any
static electricity from your body. This ensures that the worker will not
electrically damage the PCA.
•
Do not push the DE cover under any circumstances.
C141-F055-01EN
2-1
2.1 Spare Parts
Removal and Replacement Procedure
2.1 Spare Parts
See Table 2.1 for the model and parts numbers to order the replacement disk
drive.
Table 2.1 Model and parts numbers
Model
Part number
Formatted
capacity
Mounting screw
M3 (depth 3)
MHR2040AT
MHR2030AT
MHR2020AT
MHR2010AT
CA06062-B042
CA06062-B032
CA06062-B022
CA06062-B012
40 GB
30 GB
20 GB
10 GB
2.2 Disk Drive Removal
The method and procedures to demount the disk drive to check the jumper
terminal, change the jumper position, or replace the device differ depend on the
system cabinet structure. Therefore, for actual working procedures, the specific
conditions necessary for each system must be determined. The general removal
procedures, with notes, is as follows.
a) Disconnect the power-interface cable.
b) Remove the screws that attach the drive and remove the drive from the
system cabinet.
c) When storing or transporting the drive, pack it an antistatic bag.
To protect the device from damage and prevent the worker getting hurt, observe
the following cautions and precautions in Subsection 1.1.1.
Damage or Device damage
1. Perform any removal after the system power is completely
disconnected. The cable must not be disconnected and the
screws that attach the drive must not be removed with the
power ON.
2. Do not move the drive until it comes to a complete stop (about
30 s after the power is turned OFF).
3. Perform the human body grounding to discharge any static
electricity from your body. (Be sure to wear a wrist strap)
2-2
C141-F055-01EN
Acronyms and Abbreviations
A
H
ABRT
AC
AIC
Aborted command
Alternating current
Automatic idle control
HA
HDD
Host adapter
Hard disk drive
AMNF Address mark not found
I
ATA
AWG
AT attachment
American Wire Gauge
IDNF
IRQ14
ID not found
Interrupt request 14
B
L
BBK
BIOS
Bad block detected
Basic input-output system
LED
Light emitting diode
M
C
MB
Mega-byte
CORR
CH
CL
CM
CMOS
Corrected data
MB/s
MPU
MTBF
MTTR
Mega-byte per seconds
Micro processor unit
Mean time between failures
Mean time to repair
Cylinder high register
Cylinder low register
Command register
Complementary
metal-oxide semiconductor
Current sense register
Contact start/stop
O
CSR
CSS
CY
OEM
Original equipment manufacture
Cylinderregister
P
D
PCA
PIO
P/N
Printed circuit assembly
Programmed input-output
Parts number
dBA
DC
DE
dB A-scale weighting
Direct current
Disk enclosure
DH
Device/head register
Drive ready
Data request bit
Drive seek complete
Drive write fault
R
DRDY
DRQ
DSC
DWF
RLL
Run-length-limited
S
SA
SC
SG
SN
ST
System area
Sector count register
Signal ground
Sector number register
Status register
E
ECC
ER
ERR
Error checkingand correction
Error register
Error
S/N
Serial number
F
T
FR
Features register
TPI
Tracks per inches
TR0NF Track 0 not found
Typ Typical
G
GB
Giga byte
C141-F055-01EN
AB-1
Acronyms and Abbreviations
U
UNC
VCM
Uncorrectable ECC error
V
Voice coil motor
AB-2
C141-F055-01EN
Index
D
N
Dampproof packaging 1-5
Delivery 1-5
revision number marking 1-6
Diagnostic test 1-11
Disk drive
Notes
general 1-4
on handling 1-4
O
replaced, troubleshooting 1-11
replacement 1-5
revision number 1-6
revision number label 1-6
Offline self-diagnostics 1-8
Operation
configuration 1-10
test 1-10
Disposition for error register contents 1-10
P
E
Packaging 1-4
dampproof 1-5
Parts
Exchangable parts in field 1-3
F
numbers 2-2
replacement 1-5
Preventive maintenance 1-3
Factory
maintenace 1-5
troubleshooting 1-13
Field
R
exchangable parts 1-3
maintenance 1-5
Removal and replacement procedure 2-1
Revision, firmware code 1-6
Revision number
revision number change 1-6, 1-7
troubleshooting 1-12
Firmware code and revision 1-6
change in the field 1-6, 1-7
mark when delivered 1-6, 1-7
Rules for maintenance 1-2
G
General notes 1-4
S
Self-diagnostics 1-8
initial 1-8
H
Handling, notes 1-4
offline 1-8
Service
life 1-3
I
system and repair 1-3
Spare parts 2-2
Status register contents 1-10
Storage 1-5
Initial self-diagnostics 1-8
Installation 1-4
L
System level 1-12
and field troubleshootng 1-12
Levels, maintenance 1-5
T
M
Test 1-8
Maintenance 1-1
levels 1-5
requirements 1-3
Maintenance and diagnosis 1-1
Model 2-2
equipment 1-8
flowchart 1-9
Tools 1-8
C141-F055-01EN
IN-1
Index
Troubleshooting
at factory 1-13
disk drive replaced in field 1-11
procedure 1-11
system level and field 1-12
U
Unpacking 1-4
IN-2
C141-F055-01EN
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DISK DRIVES
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MHR2040AT, MHR2030AT, MHR2020AT, MHR2010AT
DISK DRIVES MAINTENANCE MANUAL
C141-F055-01EN
MHR2040AT, MHR2030AT, MHR2020AT, MHR2010AT
DISK DRIVES MAINTENANCE MANUAL
C141-F055-01EN
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