Seagate ST32000644NS, ST31000524NS, ST3500514NS manual 500GB Drive DC power requirements

Table 4:	500GB Drive DC power requirements
			1.5Gb mode			3.0Gb mode
Voltage		+5V	+12V	Power	+5V	+12V	Power
Regulation		±5%	±5%	(Watts)	±5%	±5%	(Watts)
Avg Idle Current *		0.26	0.20	3.71	0.28	0.20	3.74
Advanced Idle Current *
	Idle_A	0.13	0.21	3.13	0.14	0.21	3.17
	Idle_B	0.13	0.18	2.82	0.14	0.18	2.85
	Idle_C	0.13	0.07	1.50	0.14	0.07	1.52
	Standby	0.09	0.01	0.53	0.09	0.01	0.55
Transition	Current *
	Idle_A (Active)	0.84	0.52	10.44	0.84	0.54	10.68
	Idle_B (Active)	0.70	1.11	16.81	0.80	1.13	17.56
	Idle_C (Active)	0.70	2.45	32.91	0.72	2.43	32.77
	Standby (Active)	0.80	2.59	35.08	0.84	2.59	35.28
Average	Sleep Current	0.09	0.01	0.54	0.09	0.01	0.56
Maximum Start Current
	DC (peak DC)	0.36	2.03	26.14	0.36	2.03	26.14
	AC (Peak DC)	0.55	2.59	33.83	0.63	2.59	34.24
Delayed Motor Start (DC max)		0.09	0.01	0.55	0.09	0.01	0.59
Peak operating current (random read):
	Typical DC	0.29	0.42	6.45	0.29	0.42	6.47
	Maximum DC	0.30	0.42	6.56	0.30	0.42	6.54
	Maximum DC(peak)	1.00	1.38	27.56	1.00	1.38	21.32
Peak	operating current (random write)
	Typical DC	0.31	0.32	5.32	0.31	0.31	5.31
	Maximum DC	0.31	0.33	5.48	0.31	0.32	5.45
	Maximum DC(peak)	1.20	1.40	22.80	1.20	1.38	22.56
Peak	operating current (sequential read)
	Typical DC	0.62	0.21	5.63	0.62	0.21	5.62
	Maximum DC	0.63	0.21	5.72	0.63	0.21	5.72
	Maximum DC(peak)	1.02	0.46	10.62	1.02	0.46	10.62
Peak	operating current (sequential write)
	Typical DC	0.66	0.21	5.84	0.66	0.21	5.82
	Maximum DC	0.67	0.21	5.92	0.67	0.21	5.89
	Maximum DC(peak)	1.34	0.46	12.22	1.30	0.48	12.26

*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.

Constellation ES Serial ATA Product Manual, Rev. D 11