Seagate ST300MP0014 Savvio 15K.3 SAS Product Manual - Page 33

Notify Spinup primitive.

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Table 3: 146GB models DC power requirements 3.0 Gb mode 6.0 Gb mode Parameter Notes (Amps) (Amps) (Amps) (Amps) Voltage +5V +12V [2] +5V +12V [2] Regulation [5] ±5% ±5% [2] ±5% ±5% [2] Avg idle current DC [1] [7] 0.38 0.20 0.38 0.20 Standby 3σ 0.28 0.05 0.27 0.04 Maximum starting current (peak DC) DC 3σ [3] 0.67 0.86 0.67 0.86 (peak AC) AC 3σ [3] 1.05 1.80 1.05 1.90 Delayed motor start (max) DC 3σ [1] [4] 0.56 0.06 0.56 0.06 Peak operating current: (random read) Typical DC [1] [6] 0.50 0.41 0.50 0.42 Maximum DC 3σ [1] 0.52 0.42 0.52 0.43 Maximum (peak) DC 3σ 1.37 1.25 1.37 1.32 Peak operating current: (random write) Typical DC [1] 0.59 0.33 0.59 0.33 Maximum DC 3σ [1] 0.61 0.34 0.61 0.34 Maximum (peak) DC 3σ 1.26 1.27 1.26 1.34 Peak operating current: (sequential read) Typical DC [1] 0.89 0.19 0.89 0.19 Maximum DC 3σ [1] 0.97 0.19 0.97 0.19 Maximum (peak) DC 3σ 1.30 0.43 1.30 0.43 Peak operating current: (sequential write) Typical DC [1] 1.02 0.19 1.05 0.19 Maximum DC 3σ [1] 1.10 0.19 1.10 0.19 Maximum (peak) DC 3σ 1.40 0.36 1.40 0.36 [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. [2] For +12 V, a -10% tolerance is allowed during initial spindle start but must return to ±5% before reaching 15K 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 1. [4] This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive. [5] See paragraph 7.3.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and transient response. [6] Operating condition is defined as random 8 block reads. [7] During idle, the drive heads are relocated every 60 seconds to a random location within the band from three-quarters to maximum track. Savvio 15K.3 SAS Product Manual, Rev. E 25

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Savvio 15K.3 SAS Product Manual, Rev. E
25
[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
15K 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 1.
[4]
This condition occurs after OOB and Speed Negotiation completes but before the drive has received the
Notify Spinup primitive.
[5]
See paragraph 7.3.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and
transient response.
[6]
Operating condition is defined as random 8 block reads.
[7]
During idle, the drive heads are relocated every 60 seconds to a random location within the band from
three-quarters to maximum track.
Table 3:
146GB models
DC power requirements
Notes
3.0 Gb mode
6.0 Gb mode
Parameter
(Amps)
(Amps)
(Amps)
(Amps)
Voltage
+5V
+12V [2]
+5V
+12V [2]
Regulation
[5]
±5%
±5% [2]
±5%
±5% [2]
Avg idle current DC
[1] [7]
0.38
0.20
0.38
0.20
Standby
3
σ
0.28
0.05
0.27
0.04
Maximum starting current
(peak DC) DC
3
σ
[3]
0.67
0.86
0.67
0.86
(peak AC) AC
3
σ
[3]
1.05
1.80
1.05
1.90
Delayed motor start (max) DC
3
σ
[1] [4]
0.56
0.06
0.56
0.06
Peak operating current: (random read)
Typical DC
[1] [6]
0.50
0.41
0.50
0.42
Maximum DC
3
σ
[1]
0.52
0.42
0.52
0.43
Maximum (peak) DC
3
σ
1.37
1.25
1.37
1.32
Peak operating current: (random write)
Typical DC
[1]
0.59
0.33
0.59
0.33
Maximum DC
3
σ
[1]
0.61
0.34
0.61
0.34
Maximum (peak) DC
3
σ
1.26
1.27
1.26
1.34
Peak operating current: (sequential read)
Typical DC
[1]
0.89
0.19
0.89
0.19
Maximum DC
3
σ
[1]
0.97
0.19
0.97
0.19
Maximum (peak) DC
3
σ
1.30
0.43
1.30
0.43
Peak operating current: (sequential write)
Typical DC
[1]
1.02
0.19
1.05
0.19
Maximum DC
3
σ
[1]
1.10
0.19
1.10
0.19
Maximum (peak) DC
3
σ
1.40
0.36
1.40
0.36