Fujitsu MHL2300AT, MHM2150AT, MHM2100AT, MHM2200AT Maintenance Manual

MHL2300AT, MHM2200AT,

MHM2150AT, MHM2100AT

DISK DRIVES

C141-F043-01EN

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 I NJURY 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.

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 2000

C141-F043-01EN

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Revision History

(1/1)

Edition Date Revised section (*1)

(Added/Deleted/Altered)

01 2000-02-15 — —

Details

*1 Section(s) with asterisk (*) refer to the previous edition when those were deleted.

C141-F043-01EN

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Preface

This manual describes the MHL2300AT, MHM2200AT, MHM2150AT and MHM2100AT 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 MHL2300AT, MHM2200AT, MHM2150AT and
MHM2100AT maintenance requirements, operation verification, and
troubleshooting.

CHAPTER 2 Removal and Replacement Procedure

This chapter explains the procedure for removing and replacing the MHL2300AT,
MHM2200AT, MHM2150AT and MHM2100AT.

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.

This indicates information that could help the user
use the product more efficiently.

C141-F043-01EN i

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).

Preface

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-F043-01EN

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 predate or other property, may occur if the user does
not perform the procedure correctly.

Task Alert message Page

Maintenance 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.

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.

1-2

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.

C141-F043-01EN iii

Important Alert Items

Task Alert message Page

Maintenance 7. Do not apply excessive force to the cover under any

circumstances. Doing so may cause irreparable damage
to the cover.

The DE is completely sealed. Do not open the DE in the
field.

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.

The disk enclosure must never to be opened in the field.
Opening the disk enclosure may cause irreparable 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)

1-2

1-3

1-4

1-12

2-2

iv C141-F043-01EN

Manual Organization

MHL2300AT, MHM2200AT,
MHM2150AT, MHM2100AT

DISK DRIVES

PRODUCT MANUAL

(C141-E104)

MHL2300AT, MHM2200AT,
MHM2150AT, MHM2100AT

DISK DRIVES

MAINTENANCE MANUAL

(C141-F043)

<This manual>

1. Device Overview

2. Device Configuration

3. Installation Conditions

4. Theory of Device Operation

5. Interface

6. Operations

1. Maintenance and Diagnosis

2. Removal and Replacement Procedure

C141-F043-01EN v

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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 1-2

1.1.3 Maintenance levels 1-5

1.1.4 Disk drive revision number 1-6

1.1.5 Tools and test equipment 1-7

1.1.6 Self-diagnostics 1-7

1.1.7 Test 1-7

1.2 Operation Confirmation 1-9

1.2.1 Operation test 1-9

1.2.2 Diagnostic test 1-10

1.3 Troubleshooting Procedure 1-10

1.3.1 Troubleshooting procedure 1-10

1.3.2 Troubleshooting disk drive replaced in field 1-10

1.3.3 Troubleshooting at factory 1-12

CHAPTER 2 Removal and Replacement Procedure.................................... 2-1

2.1 Spare Parts 2-2

2.2 Disk Drive Removal 2-2

C141-F043-01EN vii

Figures

Tables

Contents

Illustrations

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 1-8

Table 1.1 Status register contents 1-9
Table 1.2 Disposition for error register contents 1-9
Table 1.3 System level and field troubleshooting 1-11

Table 2.1 Model and parts numbers 2-2

viii C141-F043-01EN

CHAPTER 1 Maintenance and Diagnosis

1.1 Maintenance

1.2 Operation Confirmation

1.3 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-F043-01EN 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.

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.

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.

1.1.2 Maintenance requirements

(1) Preventive maintenance

The disk drive needs no preventive maintenance, not even the air filter needs to be
changed.

1-2 C141-F043-01EN

Maintenance and Diagnosis 1.1 Maintenance

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. For the measurement point of the DE surface
temperature, refer to Section 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-F043-01EN 1-3

1.1 Maintenance Maintenance and Diagnosis

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).

b. Unpacking

c. Installation

− Hold by the DE section, do not directly touch the PCA unit

unnecessarily.

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.

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-F043-01EN

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 MHL2300AT, MHM2200AT, MHM2150AT,

MHM2100AT 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 MHL2300AT,
MHM2200AT, MHM2150AT, MHM2100AT 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-F043-01EN 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-F043-01EN

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

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.

C141-F043-01EN 1-7

1.1 Maintenance Maintenance and Diagnosis

Start

Yes

Check the host system
(Table 1.1)

Operation test with the
host computer or test
equipment

Test acceptable?

Yes

Continue with the
operation

No

System normal?

Yes

Disk drive
replacement or repair

Disk drive normal?

Yes

Diagnostic test with
the host computer or
test equipment

Test acceptable?

Yes

Test using voltage or
temperature stress

No

No

No

Analyze the system
related failure

Test acceptable?

Yes

No failure

No Disk drive fa il ure

analysis (Table 1.2)

Figure 1.3 Test flowchart

1-8 C141-F043-01EN

Maintenance and Diagnosis 1.2 Operation Confirmation

Table 1.1 Status register contents

Status bit Contents

BIT0=1 Shown in Table 1.2
BIT1, 2 Normal.
BIT3=1
BIT4=1
BIT5=1
BIT6=0
BIT7=1

Error bit Method of disposition

BIT0
BIT1
BIT4
BIT6

BIT2
BIT7

(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

If it is concluded that the disk drive is the cause, replace the drive.

(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.

C141-F043-01EN 1-9

1.3 Troubleshooting Procedure Maintenance and Diagnosis

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.

1-10 C141-F043-01EN

Maintenance and Diagnosis 1.3 Troubleshooting Procedure

Table 1.3 System level and field troubleshoot i ng

Check to be made Recommended work

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

Power-interface
cable connection

Check that the maximum ripple at +5 VDC power is less than 100 mV
peak to peak and 200 mV peak to peak respectively.

Confirm that the AT interface cable is properly connected at the disk
drive, power supply section, and control unit.

Switch setting 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

MHL2300AT, MHM2200AT, MHM2150AT, MHM2100AT Disk Drives
Product Manual for switch setting.

System cable Confirm that all cable connections throughout the system correctly

connected.

System diagnostic
test

Intermittent or
indefinite error

To further isolate the failure, if it can be done, execute the system level
diagnostic routine described in the host computer manual.

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.

C141-F043-01EN 1-11

1.3 Troubleshooting Procedure Maintenance and Diagnosis

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.

The disk enclosure must never to be opened in the field. Opening
the disk enclosure may cause irreparable damage.

1-12 C141-F043-01EN

CHAPTER 2 Removal and Replacement Procedure

2.1 Spare Parts

2.2 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-F043-01EN 2-1

2.2 Disk Drive Removal 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

MHL2300AT CA05428-B060 30 GB
MHM2200AT CA05429-B040 20 GB
MHM2150AT CA05429-B030 15 GB
MHM2100AT CA05429-B020 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.

Mounting screw

capacity

M3 (depth 3)

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.

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-F043-01EN

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DISK DRIVES MAINTENANCE MANUAL

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C141-F043-01EN

MHL2300AT, MHM2200AT, MHM2150AT, MHM2100AT
DISK DRIVES MAINTENANCE MANUAL

MHL2300AT, MHM2200AT, MHM2150AT, MHM2100AT
DISK DRIVES MAINTENANCE MANUAL

C141-F043-01EN

C141-F043-01EN