Seagate ST900MM0006, Руководство по эксплуатации продукта

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S
AVVIO
10K.6 SAS P
RODUCT
M
ANUAL
, R
EV
. C 23
[1] Measured with average reading DC ammeter. Instant12V 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 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 1 (for 900GB models) and Figure 2 (for 600GB models).
[4] See +12V current profile in Figure 3 (for 450GB models) and Figure 4 (for 300GB models).
[5] This condition occurs after OOB and Speed Negotiation completes but before the drive has received the Notify Spinup primitive.
[6] See paragraph 6.3.1, "Conducted noise immunity." Specified voltage tolerance includes, noise, and transient response.
[7] Operating condition is defined as random 8 block reads.
[8] During idle, the drive heads are relocated every 30 seconds to a random location within the band from three-quarters to maximum
track.
Table 4 300GB standard model DC power requirements
N
OTES
3.0G
B MODE
6.0G
B MODE
(A
MPS
) (A
MPS
) (A
MPS
) (A
MPS
)
Voltage +5V +12V [2] +5V +12V [2]
Regulation [6] ±5% ±5% [2] ±5% ±5% [2]
Avg idle current DC [1] [8] 0.32 0.12 0.32 0.12
Advanced Idle Current
Idle_A 3 σ 0.37 0.13 0.36 0.13
Idle_B 3
σ
0.25 0.11 0.25 0.11
Idle_C 3
σ
0.25 0.05 0.25 0.05
Standby 3 σ 0.24 0.01 0.24 0.01
Maximum starting current
(peak DC) DC 3
σ
[4] 0.82 0.80 0.87 0.80
(peak AC) AC 3
σ
[4] 1.05 1.84 1.07 2.47
Delayed motor start (max) DC 3
σ
[1] [5] 0.24 0.01 0.24 0.01
Peak operating current (random read):
Typical DC [1] [7] 0.41 0.39 0.41 0.40
Maximum DC 3
σ
[1] 0.45 0.42 0.46 0.42
Maximum (peak) DC 3
σ
1.53 1.27 1.61 1.30
Peak operating current (random write)
Typical DC 0.42 0.31 0.42 0.31
Maximum DC 3
σ
0.46 0.33 0.45 0.33
Maximum (peak) DC 3
σ
1.01 1.28 1.08 1.30
Peak operating current (sequential read)
Typical DC 0.82 0.13 0.83 0.13
Maximum DC 3
σ
0.88 0.14 0.88 0.14
Maximum (peak) DC 3
σ
1.06 0.41 1.07 0.41
Peak operating current (sequential write)
Typical DC 0.78 0.13 0.78 0.13
Maximum DC 3 σ 0.81 0.14 0.82 0.14
Maximum (peak) DC 3
σ
1.05 0.44 1.00 0.42