Fujitsu MHJ2181AT User manual

C141-E088-03EN
MHJ2181AT, MHK2120AT,
MHK2090AT, MHK2060AT
DISK DRIVES
PRODUCT MANUAL

C141-E088-03EN
FOR SAFE OPERATION
Handling of This Manual
This manual contains important information for using this product. Read thoroughly before using
the product. Use this product only after thoroughly reading and understanding especially the
section “Important Alert Items”in this manual. Keep this manual handy, and keep it carefully.
FUJITSU makes every effort to prevent users and bystanders from being injured or from suffering
damage to their property. Use the product according to this manual.
IMPORTANT NOTE TO USERS
READ THE ENTIRE MANUAL CAREFULLY BEFORE USING THIS PRODUCT.
INCORRECT USE OF THE PRODUCT MAY RESULT IN INJURY OR DAMAGE TO
USERS, BYSTANDERS OR PROPERTY.
While FUJITSU has sought to ensure the accuracy of all information in this manual, FUJITSU
assumes no liability to any party for any damage caused by any error or omission contained in this
manual, its updates or supplements, whether such errors or omissions result from negligence,
accident, or any other cause. In addition, FUJITSU assumes no liability with respect to the
application or use of any 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 1999

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C141-E088-03EN
Revision History
(1/1)
Edition Date Revised section (*1)
(Added/Deleted/Altered) Details
01 1999-07-20 — —
02
03
1999-08-30
1999-10-15
Chapter 1 (Altered)
Chapter 4 (Altered)
Chapter 1 (altered)
• Shock and vibration specifications for
MHJ series added to the Table 1.6.
• 60 servo frames revolution changed to
66 servo frames revolution in the
Figure 4.7.
• Specifications of Table 1.1 is partly
modified.
• The value of duration for MHK series
on the Table 1.6 is modified.
*1 Section(s) with asterisk (*) refer to the previous edition when those were deleted.

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C141-E088-03EN i
Preface
This manual describes the MHJ Series and MHK Series, 2.5-inch hard disk drives.
These drives have a built-in controller that is compatible with the ATA interface.
This manual describes the specifications and functions of the drives and explains in
detail how to incorporate the drives into user systems. This manual assumes that
the reader has a basic knowledge of hard disk drives and their implementations in
computer systems.
This manual consists of seven chapters and sections explaining the special
terminology and abbreviations used in this manual:
Overview of Manual
CHAPTER 1 Device Overview
This chapter gives an overview of the MHJ Series and MHK Series and describes
their features.
CHAPTER 2 Device Configuration
This chapter describes the internal configurations of the MHJ Series and MHK
Series and the configuration of the systems in which they operate.
CHAPTER 3 Installation Conditions
This chapter describes the external dimensions, installation conditions, and switch
settings of the MHJ Series and MHK Series.
CHAPTER 4 Theory of Device Operation
This chapter describes the operation theory of the MHJ Series and MHK Series.
CHAPTER 5 Interface
This chapter describes the interface specifications of the MHJ Series and MHK
Series.
CHAPTER 6 Operations
This chapter describes the operations of the MHJ Series and MHK Series.
Terminology
This section explains the special terminology used in this manual.
Abbreviation
This section gives the meanings of the definitions used in this manual.

Preface
ii C141-E088-03EN
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 hazarous 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.
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)
Data corruption: Avoid mounting the disk drive near strong
magnetic sources such as loud speakers. Ensure that the disk drive is
not affected by external magnetic fields.
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.

Preface
C141-E088-03EN iii
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.

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C141-E088-03EN v
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
Normal Operation
Data corruption: Avoid mounting the disk near strong
magnetic soures such as loud speakers. Ensure that the disk
drive is not affected by extrnal magnetic fields.
Stastic: When handling the device, disconnect the body
ground (500 k
Ω
or greater). Do not touch the printed circuit
board, but hold it by the edges.
3-8