Table Of Contents - Hitachi HDS723020BLA642 Specifications

Table of contents

1 General ................................................................................................................................................................13
Introduction .................................................................................................................................... 13
1.1
Glossary ........................................................................................................................................... 14
1.2
General caution ............................................................................................................................... 14
1.3
References ....................................................................................................................................... 14
1.4
2 General features .................................................................................................................................................15
Part 1. Functional specification ....................................................................................................................... 16
3 Fixed disk subsystem description .......................................................................................................................17
Control Electronics ......................................................................................................................... 17
3.1
Head disk assembly ........................................................................................................................ 17
3.2
Actuator ........................................................................................................................................... 17
3.3
4 Drive characteristics ............................................................................................................................................18
Default logical drive parameters ................................................................................................... 18
4.1
Data sheet ....................................................................................................................................... 19
4.2
World Wide Name Assignment ...................................................................................................... 19
4.3
Drive organization .......................................................................................................................... 20
4.4
4.4.1 Drive Format ........................................................................................................................... 20
4.4.2 Cylinder allocation .................................................................................................................. 20
Performance characteristics .......................................................................................................... 21
4.5
4.5.1 Command overhead ................................................................................................................. 21
4.5.2 Mechanical positioning ........................................................................................................... 22
4.5.3 Drive ready time ...................................................................................................................... 22
4.5.4 Operating modes ..................................................................................................................... 23
5 Defect flagging strategy ......................................................................................................................................24
6 Specification ........................................................................................................................................................25
Electrical interface ......................................................................................................................... 25
6.1
6.1.1 Connector location ................................................................................................................... 25
6.1.2 Signal definition(SATA) .......................................................................................................... 26
6.1.3 Out of band signaling(SATA) .................................................................................................. 28
Environment ................................................................................................................................... 29
6.2
6.2.1 Temperature and humidity ..................................................................................................... 29
6.2.2 Corrosion test........................................................................................................................... 30
6.2.3 Atmospheric condition ............................................................................................................ 30
DC power requirements ................................................................................................................. 31
6.3
6.3.1 Input voltage ............................................................................................................................ 31
6.3.2 Power supply current (typical) ............................................................................................... 31
6.3.3 Power supply generated ripple at drive power connector .................................................... 32
Reliability ........................................................................................................................................ 33
6.4
6.4.1 Data integrity .......................................................................................................................... 33
6.4.2 Cable noise interference ......................................................................................................... 33
6.4.3 Load/Unload ............................................................................................................................. 33
6.4.4 Start/stop cycles ....................................................................................................................... 33
6.4.5 Preventive maintenance ......................................................................................................... 33
6.4.6 Data reliability ........................................................................................................................ 33
6.4.7 Required Power-Off Sequence ................................................................................................ 33
Mechanical specifications............................................................................................................... 34
6.5
6.5.1 Physical dimensions ................................................................................................................ 34
6.5.2 Hole locations........................................................................................................................... 36
6.5.3 Connector locations ................................................................................................................. 37
6.5.4 Drive mounting ........................................................................................................................ 38
6.5.5 Heads unload and actuator lock ............................................................................................. 38
Hitachi hard disk drive specifications
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