Seagate ST9900805FC, ST9600205FC manual DC power requirements for ST9300605FC model 2Gb 4Gb Amps

Table 5:	DC power requirements for ST9300605FC model
				2Gb		4Gb
			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]	0.36	0.15	0.38	0.15
Advanced Idle Current
	Idle_A	3σ		0.38	0.16	0.39	0.16
	Idle_B	3σ		0.26	0.15	0.27	0.15
	Idle_C	3σ		0.26	0.09	0.27	0.09
	Standby	3σ		0.26	0.06	0.27	0.06
Maximum starting current
	(peak DC) DC	3σ	[4]	0.61	0.89	0.63	0.89
	(peak AC) AC	3σ	[4]	0.95	1.54	0.99	1.52
Delayed motor start (max) DC		3σ	[1] [5]	0.57	0.06	0.58	0.06
Peak operating current (random read):
	Typical DC		[1] [7]	0.45	0.35	0.47	0.35
	Maximum DC	3σ	[1]	0.47	0.37	0.49	0.37
	Maximum (peak) DC	3σ		1.23	1.48	1.16	1.46
Peak operating current (random write)
	Typical DC			0.51	0.33	0.52	0.33
	Maximum DC	3σ		0.53	0.36	0.54	0.36
	Maximum (peak) DC	3σ		1.06	1.48	1.06	1.51
Peak operating current (sequential read)
	Typical DC			0.81	0.14	0.83	0.14
	Maximum DC	3σ		0.86	0.15	0.87	0.14
	Maximum (peak) DC	3σ		1.12	0.32	1.15	0.32
Peak operating current (sequential write)
	Typical DC			0.89	0.14	0.91	0.14
	Maximum DC	3σ		0.94	0.15	0.95	0.14
	Maximum (peak) DC	3σ		1.20	0.32	1.19	0.30

[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 5.

[4]See +12V current profile in Figure 6.

[5]This condition occurs when the Motor Start option is enabled and the drive has not yet received a Start Motor com- mand.

[6]See paragraph 7.3.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient 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

26 Savvio 10K.5 FC Product Manual, Rev. D