Seagate ST9600004SS, ST9600204SS manual 450GB standard model DC power requirements 0Gb mode Amps

Table 3:	450GB standard model DC power requirements
				450GB standard model		450GB standard model
				3.0Gb mode		6.0Gb mode
			Notes	(Amps)	(Amps)	(Amps)	(Amps)
Voltage				+5V	+12V [2]	+5V	+12V [2]
Regulation			[6]	±5%	±5% [2]	±5%	±5% [2]
Avg idle current DC			[1] [8]	0.34	0.24	0.35	0.24
Advanced Idle Current
Idle_A		3σ		0.34	0.24	0.35	0.24
Idle_B		3σ		0.24	0.21	0.25	0.21
Idle_C		3σ		0.24	0.10	0.25	0.10
Standby		3σ		0.24	0.06	0.25	0.06
Maximum starting current
(peak DC) DC		3σ	[4]	0.54	0.87	0.56	0.87
(peak AC) AC		3σ	[4]	0.80	1.66	0.85	1.62
Delayed motor start (max) DC		3σ	[1] [5]	0.48	0.07	0.49	0.07
Peak operating current (random read):
Typical DC			[1] [7]	0.44	0.53	0.46	0.53
Maximum DC		3σ	[1]	0.47	0.54	0.48	0.54
Maximum (peak) DC		3σ		1.08	1.54	1.08	1.54
Peak operating current (random write)
Typical DC				0.49	0.44	0.50	0.43
Maximum DC		3σ		0.52	0.46	0.53	0.45
Maximum (peak) DC		3σ		1.02	1.58	1.02	1.56
Peak operating current (sequential read)
Typical DC				0.86	0.27	0.87	0.27
Maximum DC		3σ		0.88	0.29	0.89	0.28
Maximum (peak) DC		3σ		1.12	0.44	1.14	0.44
Peak operating current (sequential write)
Typical DC				0.80	0.27	0.81	0.27
Maximum DC		3σ		0.85	0.29	0.86	0.28
Maximum (peak) DC		3σ		1.04	0.80	1.04	0.80

[1]Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these values. Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.

[2]For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 9,936 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.

[3]See +12V current profile in Figure 17.

[4]See +12V current profile in Figure 18.

[5]This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive.

[6]See paragraph 7.3.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and tran- sient response.

[7]Operating condition is defined as random 8 block reads.

[8]During idle, the drive heads are relocated every 30 seconds to a random location within the band from three- quarters to maximum track.

24 Savvio 10K.4 SAS Product Manual, Rev. E