Seagate ST34573N/W/WD/LW/WC/LC ユーザーズマニュアル
Barracuda 9LP Installation Guide, Rev. E
19
Table 2c.
DC power requirements (Amps), multimode
(SE/LVD)
(SE/LVD)
[1] Measured with an average reading DC ammeter. Instanta-
neous +12V current peaks will exceed these values.
[2] A –10% droop is permissible during initial start of the spindle
but must return to ±5% before reaching 7,200 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.
±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 the +12V current profile in the
Barracuda 9LP Product
Manual (publication number 77767517).
[4] This condition occurs when the Motor Start option is enabled
and the drive has not yet received a Start Motor command.
ST39173LW/LC
ST34573LW/LC
Voltage
+5V
+12V
+5V
+12V
Regulation [5]
±5%
±5%[2]
±5%
±5%[2]
Max. operating current
DC
DC
1.4
0.95
1.4
0.95
Avg. idle current
DCX [1]
DCX [1]
0.75
0.5
0.75
0.5
Max. starting current
1.2
—
—
1.7
2.9
2.9
1.2
—
—
1.7
2.9
2.9
Delayed motor
start (max) [1][4]
start (max) [1][4]
0.65
0.06
0.65
0.06
Peak operating current
Maximum (peak)
1.2
1.4
1.7
1.4
1.7
0.9
0.95
2.4
0.95
2.4
1.2
1.4
1.7
1.4
1.7
0.9
0.95
2.4
0.95
2.4