Hitachi HCS721075CLA332, HCS721050CLA382, HCS721032CLA382, HCS721025CLA382 Table of contents

Table of contents

1	General		10
	1.1	Introduction	10
	1.2	Glossary	11
	1.3	General caution	11
	1.4	References	11
2	General features		12
Part 1. Functional specification			13
3 Fixed disk subsystem description			14
	3.1	Control Electronics	14
	3.2	Head disk assembly	14
	3.3	Actuator	14
4	Drive characteristics		15
	4.1	Default logical drive parameters	15
	4.2	Data sheet	17
	4.3	World Wide Name Assignment	17
	4.4	Drive organization	18
	4.5	Performance characteristics	19
5	Defect flagging strategy		23
6	Specification		24
	6.1	Electrical interface	24
	6.2	Environment	28
	6.3	DC power requirements	30
	6.4	Reliability	32
	6.5	Mechanical specifications	34
	6.6	Vibration and shock	40
	6.7	Acoustics	43
	6.8	Identification labels	43
	6.9	Safety	44
	6.10	Electromagnetic compatibility	45
Part 2. Interface Specification			46
7	General		47
	7.1	Introduction	47
	7.2	Terminology	47
	7.3	Deviations From Standard	47
8	Registers		48
	8.1	Alternate Status Register	48
	8.2	Command register	48
	8.3	Cylinder High Register	48
	8.4	Cylinder Low Register	49
	8.5	Data Register	49
	8.6	Device Control Register	49
	8.7	Drive Address Register	50
	8.8	Device/Head Register	50
	8.9	Error Register	51
	8.10	Features Register	52
	8.11	Sector Count Register	52
	8.12	Sector Number Register	52
	8.13	Status Register	53
9	General Operation Descriptions		54
	9.1	Reset Response	54
	9.2	Diagnostic and Reset considerations	55
	9.3	Sector Addressing Mode	56

- Hitachi hard disk drive specifications –

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