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Hitachi

- Hitachi hard disk drive specifications

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Table of contents

General ................................................................................................................................................................10
1.1

Introduction .................................................................................................................................... 10

Glossary ........................................................................................................................................... 11

General caution ............................................................................................................................... 11

References ....................................................................................................................................... 11

General features .................................................................................................................................................12

Part 1. Functional specification ....................................................................................................................... 13
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Fixed disk subsystem description .......................................................................................................................14
3.1

Control Electronics ......................................................................................................................... 14

Head disk assembly ........................................................................................................................ 14

Actuator ........................................................................................................................................... 14

Drive characteristics ............................................................................................................................................15
4.1

Default logical drive parameters ................................................................................................... 15

Data sheet ....................................................................................................................................... 17

World Wide Name Assignment ...................................................................................................... 17

Drive organization .......................................................................................................................... 18

Performance characteristics .......................................................................................................... 19

Defect flagging strategy ......................................................................................................................................23

Specification ........................................................................................................................................................24
6.1

Electrical interface ......................................................................................................................... 24

Environment ................................................................................................................................... 28

DC power requirements ................................................................................................................. 30

Reliability ........................................................................................................................................ 32

Mechanical specifications............................................................................................................... 34

Vibration and shock ........................................................................................................................ 40

Acoustics .......................................................................................................................................... 43

Identification labels ........................................................................................................................ 43

Safety ............................................................................................................................................... 44

Electromagnetic compatibility ....................................................................................................... 45

Part 2. Interface Specification ......................................................................................................................... 46
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General ................................................................................................................................................................47
7.1

Introduction .................................................................................................................................... 47

Terminology ..................................................................................................................................... 47

Deviations From Standard............................................................................................................. 47

Registers .............................................................................................................................................................48
8.1

Alternate Status Register .............................................................................................................. 48

Command register .......................................................................................................................... 48

Cylinder High Register .................................................................................................................. 48

Cylinder Low Register .................................................................................................................... 49

Data Register .................................................................................................................................. 49

Device Control Register.................................................................................................................. 49

Drive Address Register ................................................................................................................... 50

Device/Head Register ..................................................................................................................... 50

Error Register ................................................................................................................................. 51

Features Register ........................................................................................................................... 52

Sector Count Register .................................................................................................................... 52

Sector Number Register ................................................................................................................. 52

Status Register ............................................................................................................................... 53

General Operation Descriptions ..........................................................................................................................54
9.1

Reset Response ............................................................................................................................... 54

Diagnostic and Reset considerations............................................................................................. 55

Sector Addressing Mode ................................................................................................................. 56