Seagate SAVVIO ST9450404FC Product Manual page 29

Table 3: DC power requirements for ST9450404FC model
Voltage
Regulation
Avg idle current DC
Advanced Idle Current
Idle_A
Idle_B
Idle_C
Standby
Transition Current
Idle_A - Active
Idle_B - Active
Idle_C - Active
Standby - Active
Maximum starting current
(peak DC) DC
(peak AC) AC
Delayed motor start (max) DC
Peak operating current (random read):
Typical DC
Maximum DC
Maximum (peak) DC
Peak operatig current (random write)
Typical DC
Maximum DC
Maximum (peak) DC
Peak operating current (sequential read)
Typical DC
Maximum DC
Maximum (peak) DC
Peak operating current (sequential write)
Typical DC
Maximum DC
Maximum (peak) DC
[1] Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these val-
ues. Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.
[2] For +12 V, a –10% tolerance is allowed during initial spindle start but must return to ±5% before reaching
9,936 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.
[3] See +12V current profile in Figure 3.
Savvio 10K.4 FC Product Manual, Rev. A
2Gb
Notes (Amps)
+5V
[6] ±5%
[1] [8] 0.35
3σ 0.35
3σ 0.25
3σ 0.24
3σ 0.24
3σ 0.76
3σ 0.64
3σ 0.62
3σ 0.66
3σ [4] 0.54
3σ [4] 0.86
3σ [1] [5] 0.49
[1] [7] 0.42
3σ [1] 0.43
3σ 1.06
0.47
3σ 0.49
3σ 1.02
0.83
3σ 0.85
3σ 1.12
0.82
3σ 0.83
3σ 1.04
4Gb
(Amps) (Amps) (Amps)
+12V [2] +5V +12V [2]
±5% [2] ±5% ±5% [2]
0.25 0.38 0.25
0.25 0.37 0.25
0.22 0.27 0.22
0.10 0.27 0.10
0.06 0.27 0.06
1.54 0.78 1.54
1.58 0.64 1.54
1.56 0.66 1.56
1.64 0.68 1.64
0.89 0.56 0.89
1.64 0.88 1.64
0.06 0.51 0.06
0.46 0.45 0.46
0.48 0.47 0.47
1.54 1.10 1.54
0.39 0.49 0.40
0.41 0.51 0.42
1.58 1.02 1.56
0.24 0.86 0.24
0.25 0.89 0.25
0.40 1.14 0.40
0.24 0.85 0.24
0.25 0.87 0.25
0.46 1.06 0.44
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