Seagate ST19171WC User Manual
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.
neous +12V current peaks will exceed these values.
Single-ended
Differential
+5V
± 5%
+12V
± 5%
± 5%
+5V
± 5%
+12V
± 5%
± 5%
Voltage regulation
Amps
Maximum operating current
0.93
0.89
1.17
0.89
Maximum starting current
Peak DC
Peak AC
0.92
—
—
2.18
3.1
3.1
1.04
—
—
2.18
3.1
3.1
Delayed motor start (max)
0.82
0.08
0.90
0.08
Peak operating current
Typical DC
Maximum DC
Maximum (peak)
0.92
0.93
1.00
0.93
1.00
0.84
0.89
1.8
0.89
1.8
1.12
1.17
1.89
1.17
1.89
0.84
0.89
1.8
0.89
1.8
Track following (DC)
at OD
at ID
0.84
0.83
0.83
0.73
0.76
0.76
0.96
0.94
0.94
0.73
0.76
0.76
Read track
OD DC
AC
0.96
1.10
1.10
0.78
0.97
0.97
1.49
1.99
1.99
0.78
0.97
0.97
Seeking
Typical DC
Maximum DC
Maximum (peak) AC
0.91
0.92
0.96
0.92
0.96
1.06
1.1
1.8
1.1
1.8
0.99
1.05
1.77
1.05
1.77
1.06
1.1
1.8
1.1
1.8