Seagate ST200FX0002, ST100FX0002, ST400FX0012 manual 100GB standard model DC power requirements

Table 10: 100GB standard model DC power requirements

Parameter				100GB (6.0Gb)
Regulation			±5%	±5%
Voltage			+5V	+12V
			Current (A)	Current (A)	Power (W)
Average idle current		DC	0.40	0.17	4.04
Maximum starting current
	(peak DC) DC	3σ	1.09	0.31
	(peak AC) AC	3σ	1.16	0.73
Delayed start (max) DC		3σ	0.43	0.18	4.31
Peak operating current (random read):
	Typical DC	DC	0.46	0.21	4.82
	Maximum DC	3σ	0.49	0.23	5.21
	Maximum (peak) DC	3σ	0.80	0.72
Peak operating current (random write)
	Typical DC	DC	0.45	0.25	5.25
	Maximum DC	3σ	0.49	0.26	5.57
	Maximum (peak) DC	3σ	0.71	0.54
Peak operating current (sequential read)
	Typical DC	DC	0.54	0.28	6.06
	Maximum DC	3σ	0.58	0.29	6.38
	Maximum (peak) DC	3σ	0.80	0.58
Peak operating current (sequential write)
	Typical DC	DC	0.53	0.36	6.97
	Maximum DC	3σ	0.57	0.37	7.29
	Maximum (peak) DC	3σ	0.82	0.82

[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, 60 Degrees C ambient.

[2]For +12 V, a –10% tolerance is allowed during initial start but must return to ±5% before reaching ready state. 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 4 (for 400GB models) and Figure 5 (for 200GB models).

[4]See +12V current profile in Figure 6 (for 100GB models).

[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 transient response.

Pulsar XT.2 SAS Product Manual, Rev. B 25