Seagate ST19171WC, ST19171DC, ST19171N, ST19171WD manual Od Dc

Barracuda 9 Installation Guide, Rev. B				17
DC power requirements
	Single-ended		Differential
	+5V11	+12V	+5V11	+12V
Voltage regulation5	± 5%	± 5%2	± 5%	± 5%2
		Amps
Maximum operating current1	0.93	0.89	1.17	0.89
Maximum starting current
Peak DC 3, 6	0.92	2.18	1.04	2.18
Peak AC 3	—	3.1	—	3.1
Delayed motor start (max)1, 4	0.82	0.08	0.90	0.08
Peak operating current
Typical DC 1	0.92	0.84	1.12	0.84
Maximum DC 1	0.93	0.89	1.17	0.89
Maximum (peak)	1.00	1.8	1.89	1.8
Track following (DC)
at OD 1	0.84	0.73	0.96	0.73
at ID 1	0.83	0.76	0.94	0.76
Read track
OD DC 1	0.96	0.78	1.49	0.78
AC	1.10	0.97	1.99	0.97
Seeking
Typical DC 1, 13	0.91	1.06	0.99	1.06
Maximum DC 1	0.92	1.1	1.05	1.1
Maximum (peak) AC	0.96	1.8	1.77	1.8

1Measured with an average reading DC ammeter. Instanta- neous +12V current peaks will exceed these values.