Hitachi hard disk drive specifications
3
Table of contents
1
General ................................................................................................................................................................13
1.1
Introduction .................................................................................................................................... 13
1.2
Glossary ........................................................................................................................................... 14
1.3
General caution ............................................................................................................................... 14
1.4
References ....................................................................................................................................... 14
2
General features .................................................................................................................................................15
Part 1. Functional specification ....................................................................................................................... 16
3
Fixed disk subsystem description .......................................................................................................................17
3.1
Control Electronics ......................................................................................................................... 17
3.2
Head disk assembly ........................................................................................................................ 17
3.3
Actuator ........................................................................................................................................... 17
4
Drive characteristics ............................................................................................................................................18
4.1
Default logical drive parameters ................................................................................................... 18
4.2
Data sheet ....................................................................................................................................... 19
4.3
World Wide Name Assignment ...................................................................................................... 19
4.4
Drive organization .......................................................................................................................... 20
4.4.1
Drive Format ........................................................................................................................... 20
4.4.2
Cylinder allocation .................................................................................................................. 20
4.5
Performance characteristics .......................................................................................................... 21
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
6.1
Electrical interface ......................................................................................................................... 25
6.1.1
Connector location ................................................................................................................... 25
6.1.2
Signal definition(SATA) .......................................................................................................... 26
6.1.3
Out of band signaling(SATA) .................................................................................................. 28
6.2
Environment ................................................................................................................................... 29
6.2.1
Temperature and humidity ..................................................................................................... 29
6.2.2
Corrosion test........................................................................................................................... 30
6.2.3
Atmospheric condition ............................................................................................................ 30
6.3
DC power requirements ................................................................................................................. 31
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
6.4
Reliability ........................................................................................................................................ 33
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
6.5
Mechanical specifications............................................................................................................... 34
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
Содержание Deskstar 7K3000 HDS723015BLA642
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