Seagate ST33000650SS, ST33000652SS, ST33000651SS manual Measured with average reading DC ammeter

Table 2:	3000GB drive (Standard & SED model) DC power requirements
				3.0Gb mode		6.0Gb mode
			Notes	(Amps)	(Amps)	(Amps)	(Amps)
Voltage				+5V	+12V [4]	+5V	+12V [4]
Regulation			[5]	± 5% [2]		± 5% [2]
			[1] [7]	0.28	0.50	0.28	0.50
Avg idle current DCX
Advanced idle current
	Idle_A			0.28	0.50	0.28	0.50
	Idle_B			0.26	0.41	0.26	0.41
	Idle_C/ Standby_Y			0.26	0.24	0.26	0.24
	Standby_Z			0.25	0.01	0.25	0.01
Maximum starting current
	(peak DC) DC	3σ	[5]	0.60	1.71	0.60	1.70
		3σ
	(peak AC) AC		[5]	0.82	2.29	0.88	2.23
		3σ
Delayed motor start (max) DC			[1] [6]	0.39	0.01	0.39	0.01
Peak operating current (random read):
			[1] [6]	0.48	0.74	0.49	0.74
	Typical DCX
		3σ
	Maximum DC		[1]	0.49	0.75	0.50	0.76
		3σ
	Maximum (peak) DC			1.14	1.88	1.16	1.86
Peak operating current (random write)
				0.58	0.60	0.59	0.61
	Typical DCX
		3σ
	Maximum DC			0.60	0.62	0.60	0.62
		3σ
	Maximum (peak) DC			1.20	1.86	1.18	1.88
Peak operating current (sequential read)
				0.79	0.48	0.79	0.49
	Typical DCX
		3σ
	Maximum DC			0.83	0.49	0.84	0.50
		3σ
	Maximum (peak) DC			1.16	0.88	1.12	0.90
Peak operating current (sequential write)
				0.94	0.48	0.94	0.48
	Typical DCX
		3σ
	Maximum DC			0.98	0.49	0.98	0.50
		3σ
	Maximum (peak) DC			1.20	0.88	1.20	0.88

[1]Measured with average reading DC ammeter.

[2]Instantaneous +12V current peaks will exceed these values.

[3]Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.

[4]For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ± 5% before reaching 7200 RPM. The ± 5% must be maintained after the drive signifies that its power-up sequence has been completed and that the drive is able to accept selection by the host initiator.

Constellation ES.2 SAS Product Manual, Rev. D 23