Seagate ST200FX0002 ユーザーズマニュアル
Pulsar XT.2 SAS Product Manual, Rev. B
25
[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, 60 Degrees C ambient.
supply at nominal voltage. N (number of drives tested) = 6, 60 Degrees C ambient.
[2]
For +12 V, a –10% tolerance is allowed during initial start but must return to ±5% before reaching ready state. 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]
[4]
See +12V current profile in Figure 6 (for 100GB models).
[5]
This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup
primitive.
primitive.
[6]
See paragraph 7.3.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient
response.
response.
Table 10:
100GB standard model
DC power requirements
Parameter
100GB (6.0Gb)
Regulation
±5%
±5%
Voltage
+5V
+12V
Current (A)
Current (A)
Power (W)
Average idle current
DC
0.40
0.17
4.04
Maximum starting current
(peak DC) DC
3
σ
1.09
0.31
(peak AC) AC
3
σ
1.16
0.73
Delayed start (max) DC
3
σ
0.43
0.18
4.31
Peak operating current (random read):
Typical DC
DC
0.46
0.21
4.82
Maximum DC
3
σ
0.49
0.23
5.21
Maximum (peak) DC
3
σ
0.80
0.72
Peak operating current (random write)
Typical DC
DC
0.45
0.25
5.25
Maximum DC
3
σ
0.49
0.26
5.57
Maximum (peak) DC
3
σ
0.71
0.54
Peak operating current (sequential read)
Typical DC
DC
0.54
0.28
6.06
Maximum DC
3
σ
0.58
0.29
6.38
Maximum (peak) DC
3
σ
0.80
0.58
Peak operating current (sequential write)
Typical DC
DC
0.53
0.36
6.97
Maximum DC
3
σ
0.57
0.37
7.29
Maximum (peak) DC
3
σ
0.82
0.82