Seagate BARRACUDA 9 ST19171WD - Manual (Page 19)

Barracuda 9 Installation Guide, Rev. B 17
DC power requirements
1 Measured with an average reading DC ammeter. Instanta-
neous +12V current peaks will exceed these values.
Single-ended Differential
+5V 11
± 5%
+12V
± 5%
2
+5V 11
± 5%
+12V
± 5%
2 Voltage regulation 5
Amps
Maximum operating current 1 0.93 0.89 1.17 0.89
Maximum starting current
Peak DC 3, 6
Peak AC 3
0.92
— 2.18
3.1 1.04
— 2.18
3.1
Delayed motor start (max) 1, 4 0.82 0.08 0.90 0.08
Peak operating current
Typical DC 1
Maximum DC 1
Maximum (peak)
0.92
0.93
1.00 0.84
0.89
1.8 1.12
1.17
1.89 0.84
0.89
1.8
Track following (DC)
at OD 1
at ID 1
0.84
0.83 0.73
0.76 0.96
0.94 0.73
0.76
Read track
OD DC 1
AC
0.96
1.10 0.78
0.97 1.49
1.99 0.78
0.97
Seeking
Typical DC 1, 13
Maximum DC 1
Maximum (peak) AC
0.91
0.92
0.96 1.06
1.1
1.8 0.99
1.05
1.77 1.06
1.1
1.8