Seagate ST32000646SS Constellation ES.2 SAS Product Manual - Page 31

GB drive Standard & SED model, Notes, 0Gb mode, 0Gb mode, Voltage, 12V [4], Regulation

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Table 2: 3000GB drive (Standard & SED model) DC power requirements Notes 3.0Gb mode (Amps) (Amps) 6.0Gb mode (Amps) (Amps) Voltage Regulation Avg idle current DCX Advanced idle current Idle_A [5] [1] [7] +5V +12V [4] +10%/-7.5% [2] 0.28 0.50 +5V +12V [4] +10%/-7.5% [2] 0.28 0.50 0.28 0.50 0.28 0.50 Idle_B 0.26 0.41 0.26 0.41 Idle_C/ Standby_Y 0.26 0.24 0.26 0.24 Standby_Z 0.25 0.01 0.25 0.01 Maximum starting current (peak DC) DC 3σ [5] 0.60 1.71 0.60 1.70 (peak AC) AC 3σ [5] 0.82 2.29 0.88 2.23 Delayed motor start (max) DC 3σ [1] [6] 0.39 0.01 0.39 0.01 Peak operating current (random read): Typical DCX [1] [6] 0.48 0.74 0.49 0.74 Maximum DC 3σ [1] 0.49 0.75 0.50 0.76 Maximum (peak) DC 3σ 1.14 1.88 1.16 1.86 Peak operating current (random write) Typical DCX 0.58 0.60 0.59 0.61 Maximum DC 3σ 0.60 0.62 0.60 0.62 Maximum (peak) DC 3σ 1.20 1.86 1.18 1.88 Peak operating current (sequential read) Typical DCX 0.79 0.48 0.79 0.49 Maximum DC 3σ 0.83 0.49 0.84 0.50 Maximum (peak) DC 3σ 1.16 0.88 1.12 0.90 Peak operating current (sequential write) Typical DCX 0.94 0.48 0.94 0.48 Maximum DC 3σ 0.98 0.49 0.98 0.50 Maximum (peak) DC 3σ 1.20 0.88 1.20 0.88 [1] Measured with average reading DC ammeter. [2] Instantaneous +12V current peaks will exceed these values. [3] Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient. [4] For +12 V, a -10% tolerance is allowed during initial spindle start but must return to +10%/-7.5% before reaching 7200 RPM. The +10%/-7.5% 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. Constellation ES.2 SAS Product Manual, Rev. C 23

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Constellation ES.2 SAS Product Manual, Rev. C
23
[1]
Measured with average reading DC ammeter.
[2]
Instantaneous +12V current peaks will exceed these values.
[3]
Power supply at nominal voltage. N (number of drives tested) = 6, 35 Degrees C ambient.
[4]
For +12 V, a –10% tolerance is allowed during initial spindle start but must return to +10%/-7.5% before
reaching 7200 RPM. The +10%/-7.5% 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.
Table 2:
3000GB drive (Standard & SED model)
DC power requirements
Notes
3.0Gb mode
6.0Gb mode
(Amps)
(Amps)
(Amps)
(Amps)
Voltage
+5V
+12V [4]
+5V
+12V [4]
Regulation
[5]
+10%/-7.5%
[2]
+10%/-7.5%
[2]
Avg idle current DCX
[1] [7]
0.28
0.50
0.28
0.50
Advanced idle current
Idle_A
0.28
0.50
0.28
0.50
Idle_B
0.26
0.41
0.26
0.41
Idle_C/ Standby_Y
0.26
0.24
0.26
0.24
Standby_Z
0.25
0.01
0.25
0.01
Maximum starting current
(peak DC) DC
3
σ
[5]
0.60
1.71
0.60
1.70
(peak AC) AC
3
σ
[5]
0.82
2.29
0.88
2.23
Delayed motor start (max) DC
3
σ
[1] [6]
0.39
0.01
0.39
0.01
Peak operating current (random read):
Typical DCX
[1] [6]
0.48
0.74
0.49
0.74
Maximum DC
3
σ
[1]
0.49
0.75
0.50
0.76
Maximum (peak) DC
3
σ
1.14
1.88
1.16
1.86
Peak operating current (random write)
Typical DCX
0.58
0.60
0.59
0.61
Maximum DC
3
σ
0.60
0.62
0.60
0.62
Maximum (peak) DC
3
σ
1.20
1.86
1.18
1.88
Peak operating current (sequential read)
Typical DCX
0.79
0.48
0.79
0.49
Maximum DC
3
σ
0.83
0.49
0.84
0.50
Maximum (peak) DC
3
σ
1.16
0.88
1.12
0.90
Peak operating current (sequential write)
Typical DCX
0.94
0.48
0.94
0.48
Maximum DC
3
σ
0.98
0.49
0.98
0.50
Maximum (peak) DC
3
σ
1.20
0.88
1.20
0.88