Seagate ST1000NC000 3TB Drive DC power requirements, Peak operating current sequential write

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Table 2:		3TB Drive DC power requirements
					3.0Gb mode			6.0Gb mode
Voltage				+5V		+12V	+5V		+12V
Regulation				±5%		±5%	±5%		±5%
Avg Idle Current *				0.28		0.34	0.29		0.34
Advanced Idle Current *
		Idle_A		0.17		0.34	0.18		0.34
		Idle_B		0.15		0.30	0.16		0.30
		Idle_C		0.15		0.19	0.16		0.19
		Standby		0.12		0.01	0.13		0.01
Average	Sleep Current			0.12		0.01	0.13		0.01
Maximum Start Current
		DC (peak DC)	3σ	0.45		1.16	0.45		1.16
		AC (peak DC)	3σ	0.68		1.94	0.70		1.95
Delayed Motor Start (DC max)			3σ	0.13		0.01	0.14		0.01
Peak operating current (random read):
		Typical DC		0.31		0.52	0.32		0.52
		Maximum DC	3σ	0.33		0.53	0.34		0.53
		Maximum DC(peak)	3σ	1.83		1.56	1.80		1.56
Peak operating current (random write)
		Typical DC		0.31		0.37	0.33		0.37
		Maximum DC	3σ	0.33		0.38	0.34		0.39
		Maximum DC(peak)	3σ	2.32		2.49	2.29		1.46
Peak operating current (sequential read)
		Typical DC		0.61		0.37	0.62		0.37
		Maximum DC	3σ	0.64		0.38	0.65		0.39
		Maximum DC(peak)	3σ	1.20		2.24	1.19		1.84
Peak operating current (sequential write)
		Typical DC		0.54		0.42	0.55		0.42
		Maximum DC	3σ	0.57		0.43	0.58		0.43
		Maximum DC(peak)	3σ	0.79		1.77	0.90		2.40

*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 CS Serial ATA Product Manual, Rev. C 8