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Savvio 10K.3 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
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 17.
[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: 146GB standard model DC power requirements
Notes
146GB standard model
3.0 Gbit mode
146GB standard model
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] 0.35 0.14 0.36 0.14
Maximum starting current
(peak DC) DC 3σ [3] 0.52 1.18 0.53 1.19
(peak AC) AC 3σ [3] 0.77 2.30 0.82 1.93
Delayed motor start (max) DC 3σ [1] [4] 0.56 0.04 0.57 0.06
Peak operating current (random read):
Typical DC [1] [6] 0.45 0.36 0.48 0.33
Maximum DC 3σ [1] 0.48 0.36 0.52 0.33
Maximum (peak) DC 3σ 1.08 1.18 1.14 1.16
Peak operating current (random write)
Typical DC 0.50 0.26 0.53 0.24
Maximum DC 3σ 0.52 0.27 0.56 0.25
Maximum (peak) DC 3σ 0.98 1.18 1.06 1.18
Peak operating current (sequential read)
Typical DC 0.85 0.16 0.87 0.13
Maximum DC 3σ 0.88 0.16 0.92 0.14
Maximum (peak) DC 3σ 1.12 0.28 1.16 0.26
Peak operating current (sequential write)
Typical DC 0.80 0.16 0.83 0.13
Maximum DC 3σ 0.83 0.16 0.87 0.14
Maximum (peak) DC 3σ 1.00 0.30 1.06 0.28