Hitachi T7K250 - Deskstar - Hard Drive - General Interface Information; Introduction and Terminology; Deviations from Standard

Deskstar T7K250 Hard Disk Drive Specification
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7.3.2 Power supply current (typical)
Table 37: Power supply current of xxx-GB models
Except for a peak of less than 100 ms duration
1
Random seeks at 40% duty cycle
2
Seek duty = 30%, W/R duty = 45%, Idle duty = 25%
Power supply current of
160 GB-250 GB model
(PATA models)
+5 Volts (mA) +12 Volts (mA) Total (W)
Pop mean Std
dev
Pop mean Std dev
Idle average
Idle ripple (peak-to-peak)
280
300
10
40
320
300
12
20
5.24
Low RPM idle
Low RPM idle ripple
160
220
6
20
160
300
6
20
2.72
Unload idle average
Unload idle ripple
160
220
6
20
270
400
6
20
4.04
Random R/W average
Random R/W peak
500
1200
6
30
600
1700
10
40
9.70
Silent R/W average
2
Silent R/W peak
500
1200
6
30
400
1000
8
40
7.3
Start up (max) 900 50 1880 50
Standby average 150 9 15 2 0.93
Sleep average 100 10 15 2 0.68
Power supply current of 160
GB and 250 GB model
(SATA models)
+5 Volts (mA) +12 Volts (mA) Total (W)
Pop mean Std
dev
Pop mean Std dev
Idle average
Idle ripple (peak-to-peak)
470
230
10
40
320
300
12
20
6.19
Low RPM idle
Low RPM idle ripple
350
220
6
25
160
300
10
20
3.67
Unload idle average
Unload idle ripple
350
220
6
20
270
400
13
20
4.99
Random R/W average
Random R/W peak
650
1450
9
30
600
1700
12
50
10.45