Seagate ST300MP0014 Savvio 15K.2 SAS Product Manual - Page 31

Notify Spinup primitive.

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Table 3: 73GB models DC power requirements Notes 3.0 Gbit mode (Amps) (Amps) 6.0 Gbit mode (Amps) (Amps) Voltage +5V +12V [2] +5V +12V [2] Regulation [5] ±5% ±5% [2] ±5% ±5% [2] Avg idle current DC [1] [7] 0.36 0.18 0.37 0.18 Maximum starting current (peak DC) DC 3σ [3] 0.51 1.09 0.51 1.08 (peak AC) AC 3σ [3] 0.93 1.73 0.99 1.86 Delayed motor start (max) DC 3σ [1] [4] 0.56 0.06 0.57 0.05 Peak operating current: (random read) Typical DC [1] [6] 0.45 0.36 0.46 0.36 Maximum DC 3σ [1] 0.47 0.37 0.48 0.37 Maximum (peak) DC 3σ 1.16 1.16 1.14 1.16 Peak operating current: (random write) Typical DC [1] 0.52 0.28 0.53 0.28 Maximum DC 3σ [1] 0.55 0.28 0.56 0.28 Maximum (peak) DC 3σ 1.14 1.18 1.16 1.20 Peak operating current: (sequential read) Typical DC [1] 0.88 0.18 0.89 0.18 Maximum DC 3σ [1] 0.92 0.19 0.93 0.19 Maximum (peak) DC 3σ 1.18 0.40 1.20 0.42 Peak operating current: (sequential write) Typical DC [1] 0.88 0.18 0.89 0.18 Maximum DC 3σ [1] 0.94 0.19 0.95 0.19 Maximum (peak) DC 3σ 1.16 0.40 1.18 0.40 [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 7.2.1, "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.2 SAS Product Manual, Rev. G 23

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Savvio 15K.2 SAS Product Manual, Rev. G
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.
[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 7.2.1, "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:
73GB models
DC power requirements
Notes
3.0 Gbit mode
6.0 Gbit mode
(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]
0.36
0.18
0.37
0.18
Maximum starting current
(peak DC) DC
3
σ
[3]
0.51
1.09
0.51
1.08
(peak AC) AC
3
σ
[3]
0.93
1.73
0.99
1.86
Delayed motor start (max) DC
3
σ
[1] [4]
0.56
0.06
0.57
0.05
Peak operating current: (random read)
Typical DC
[1] [6]
0.45
0.36
0.46
0.36
Maximum DC
3
σ
[1]
0.47
0.37
0.48
0.37
Maximum (peak) DC
3
σ
1.16
1.16
1.14
1.16
Peak operating current: (random write)
Typical DC
[1]
0.52
0.28
0.53
0.28
Maximum DC
3
σ
[1]
0.55
0.28
0.56
0.28
Maximum (peak) DC
3
σ
1.14
1.18
1.16
1.20
Peak operating current: (sequential read)
Typical DC
[1]
0.88
0.18
0.89
0.18
Maximum DC
3
σ
[1]
0.92
0.19
0.93
0.19
Maximum (peak) DC
3
σ
1.18
0.40
1.20
0.42
Peak operating current: (sequential write)
Typical DC
[1]
0.88
0.18
0.89
0.18
Maximum DC
3
σ
[1]
0.94
0.19
0.95
0.19
Maximum (peak) DC
3
σ
1.16
0.40
1.18
0.40