http://www.hitachigst.com/hdd/support/e7k60/e7k60.htm
Startup (max. peak) 5.5 W 5.5 W
Seek (average) 2.6 W 2.6 W
Read (average) 2.5 W 2.5 W
Write (average) 2.5 W 2.5 W
Idle (average) 2.0 W 2.0 W
Standby (average) 0.25 W 0.25 W
Sleep 0.1 W 0.1 W
Power consumption efficiency (watts/GB)3 0.033 0.033
http://www.hitachigst.com/hdd/support/7k60/7k60.htm
Requirement +5VDC(±5%)
Dissipation (typical)
Startup (max. peak) 5.5 W
Seek (average) 2.6 W
Read (average) 2.5 W
Write (average) 2.5 W
Performance idle (average) 2.0 W
Active idle (average) 1.3 W
Low power idle (average) 0.85 W
Standby (average) 0.25 W
Sleep 0.1 W
Power consumption efficiency (watts/GB) 0.014
http://www.hitachigst.com/hdd/support/4k40/4k40.htm
Requirement +5VDC(±5%)
Dissipation
Startup current (peak, max.) 4.7 W
Seek (avg.) 2.3 W
Read (avg.) 2.0 W
Write (avg.) 2.1 W
Performance idle (avg.) 1.85 W
Active idle (avg.) 0.85 W
Low power idle (avg.) 0.65 W
Standby (avg.) 0.25 W
Sleep 0.1 W
Power consump. efficiency index (W/GB) 0.016/0.022/0.033