Seagate ST91000641NS ST91000640NS Parameter 0GB Voltage +12, Regulation +10/-7.5% Watts, Power

Table 2:		1000GB drive (Standard & SED model) DC power requirementss
			ST91000640NS				ST91000640NS
	Parameter			(3.0GB)					(6.0GB)
	Voltage		+5 V	+12 V	Power	+5 V			+12 V	Power
	Regulation		+10/-7.5%		(watts)	+10/-7.5%				(watts)
	Average Idle Current		0.27	0.16	3.27	0.27		0.16		3.31
	Advanced Idle Current
		Idle1	0.22	0.16	3.07	0.23		0.16		3.10
		Idle2	0.15	0.13	2.33	0.16		0.13		2.36
		Idle3	0.15	0.09	1.86	0.16		0.09		1.89
		Standby	0.14	0.04	1.16	0.14		0.04		1.19
	Average Sleep Current		0.14	0.04	1.15	0.14		0.04		1.20
	Maximum Start Current:
		DC (Peak DC)	0.51	0.99	14.43	0.52		0.99		14.50
		AC (Peak AC)	0.72	1.37	19.99	0.66		1.36		19.61
	Delayed Motor Start (DC max)		0.14	0.04	1.18	0.15		0.04		1.23
	Peak Operating Current (random read):
		Typical DC	0.29	0.32	5.26	0.31		0.31		5.21
		Maximum DC	0.32	0.33	5.56	0.34		0.33		5.65
		Maximum DC (peak)	1.02	0.90	15.90	1.00		0.88		15.56
	Peak Operating Current (random write):
		Typical DC	0.38	0.27	5.19	0.39		0.27		5.19
		Maximum DC	0.40	0.28	5.40	0.41		0.28		5.46
		Maximum DC (peak)	0.96	0.90	15.60	0.96		0.90		15.60
	Peak operating current (sequential read):
		Typical DC	0.61	0.18	5.19	0.62		0.18		5.24
		Maximum DC	0.64	0.19	5.42	0.65		0.18		5.45
		Maximum DC (peak)	0.82	0.36	8.42	0.84		0.36		8.52
	Peak operating current (sequential write):
		Typical DC	0.76	0.18	5.93	0.76		0.18		5.95
		Maximum DC	0.79	0.19	6.16	0.80		0.19		6.22
		Maximum DC (peak)	0.98	0.34	8.98	0.98		0.36		9.22

*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.

10 Constellation.2 Serial ATA Product Manual, Rev. B