Seagate ST9900805SS Savvio 10K.4 SAS Product Manual - Page 31

Table 3, DC power requirements

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Table 3: 450GB standard model DC power requirements 450GB standard model 3.0Gb mode 450GB standard model 6.0Gb mode Notes (Amps) (Amps) (Amps) (Amps) Voltage +5V +12V [2] +5V +12V [2] Regulation [6] ±5% ±5% [2] ±5% ±5% [2] Avg idle current DC [1] [8] 0.34 0.24 0.35 0.24 Advanced Idle Current Idle_A 3σ 0.34 0.24 0.35 0.24 Idle_B 3σ 0.24 0.21 0.25 0.21 Idle_C 3σ 0.24 0.10 0.25 0.10 Standby 3σ 0.24 0.06 0.25 0.06 Transition Current Idle_A - Active 3σ 0.68 1.58 0.78 1.56 Idle_B - Active 3σ 0.66 1.54 0.66 1.54 Idle_C - Active 3σ 0.74 1.70 0.66 1.66 Standby - Active 3σ 0.68 1.64 0.70 1.60 Maximum starting current (peak DC) DC 3σ [4] 0.54 0.87 0.56 0.87 (peak AC) AC 3σ [4] 0.80 1.66 0.85 1.62 Delayed motor start (max) DC 3σ [1] [5] 0.48 0.07 0.49 0.07 Peak operating current (random read): Typical DC [1] [7] 0.44 0.53 0.46 0.53 Maximum DC 3σ [1] 0.47 0.54 0.48 0.54 Maximum (peak) DC 3σ 1.08 1.54 1.08 1.54 Peak operatig current (random write) Typical DC 0.49 0.44 0.50 0.43 Maximum DC 3σ 0.52 0.46 0.53 0.45 Maximum (peak) DC 3σ 1.02 1.58 1.02 1.56 Peak operating current (sequential read) Typical DC 0.86 0.27 0.87 0.27 Maximum DC 3σ 0.88 0.29 0.89 0.28 Maximum (peak) DC 3σ 1.12 0.44 1.14 0.44 Peak operating current (sequential write) Typical DC 0.80 0.27 0.81 0.27 Maximum DC 3σ 0.85 0.29 0.86 0.28 Maximum (peak) DC 3σ 1.04 0.80 1.04 0.80 [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, 35 Degrees C ambient. Savvio 10K.4 SAS Product Manual, Rev. C 23

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Savvio 10K.4 SAS Product Manual, Rev. C
23
[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.
Table 3:
450GB standard model
DC power requirements
Notes
450GB standard model
3.0Gb mode
450GB standard model
6.0Gb mode
(Amps)
(Amps)
(Amps)
(Amps)
Voltage
+5V
+12V [2]
+5V
+12V [2]
Regulation
[6]
±5%
±5% [2]
±5%
±5% [2]
Avg idle current DC
[1] [8]
0.34
0.24
0.35
0.24
Advanced Idle Current
Idle_A
3
σ
0.34
0.24
0.35
0.24
Idle_B
3
σ
0.24
0.21
0.25
0.21
Idle_C
3
σ
0.24
0.10
0.25
0.10
Standby
3
σ
0.24
0.06
0.25
0.06
Transition Current
Idle_A - Active
3
σ
0.68
1.58
0.78
1.56
Idle_B - Active
3
σ
0.66
1.54
0.66
1.54
Idle_C - Active
3
σ
0.74
1.70
0.66
1.66
Standby - Active
3
σ
0.68
1.64
0.70
1.60
Maximum starting current
(peak DC) DC
3
σ
[4]
0.54
0.87
0.56
0.87
(peak AC) AC
3
σ
[4]
0.80
1.66
0.85
1.62
Delayed motor start (max) DC
3
σ
[1] [5]
0.48
0.07
0.49
0.07
Peak operating current (random read):
Typical DC
[1] [7]
0.44
0.53
0.46
0.53
Maximum DC
3
σ
[1]
0.47
0.54
0.48
0.54
Maximum (peak) DC
3
σ
1.08
1.54
1.08
1.54
Peak operatig current (random write)
Typical DC
0.49
0.44
0.50
0.43
Maximum DC
3
σ
0.52
0.46
0.53
0.45
Maximum (peak) DC
3
σ
1.02
1.58
1.02
1.56
Peak operating current (sequential read)
Typical DC
0.86
0.27
0.87
0.27
Maximum DC
3
σ
0.88
0.29
0.89
0.28
Maximum (peak) DC
3
σ
1.12
0.44
1.14
0.44
Peak operating current (sequential write)
Typical DC
0.80
0.27
0.81
0.27
Maximum DC
3
σ
0.85
0.29
0.86
0.28
Maximum (peak) DC
3
σ
1.04
0.80
1.04
0.80