Seagate ST900MM0006 Product Manual page 29

Table 4 300GB standard model DC power requirements
Voltage
Regulation
Avg idle current DC
Advanced Idle Current
Idle_A
Idle_B
Idle_C
Standby
Maximum starting current
(peak DC) DC
(peak AC) AC
Delayed motor start (max) DC
Peak operating current (random read):
Typical DC
Maximum DC
Maximum (peak) DC
Peak operating current (random write)
Typical DC
Maximum DC
Maximum (peak) DC
Peak operating current (sequential read)
Typical DC
Maximum DC
Maximum (peak) DC
Peak operating current (sequential write)
Typical DC
Maximum DC
Maximum (peak) DC
[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 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.
S 10K.6 SAS P
AVVIO RODUCT
N
OTES
[6]
[1] [8]
3σ
3σ
3σ
3σ
3σ [4]
3σ [4]
3σ [1] [5]
[1] [7]
3σ [1]
3σ
3σ
3σ
3σ
3σ
3σ
3σ
M , R . C
ANUAL EV
3.0G
B MODE
(A ) (A )
MPS MPS
+5V +12V [2]
±5% ±5% [2]
0.32 0.12
0.37 0.13
0.25 0.11
0.25 0.05
0.24 0.01
0.82 0.80
1.05 1.84
0.24 0.01
0.41 0.39
0.45 0.42
1.53 1.27
0.42 0.31
0.46 0.33
1.01 1.28
0.82 0.13
0.88 0.14
1.06 0.41
0.78 0.13
0.81 0.14
1.05 0.44
6.0G
B MODE
(A ) (A )
MPS MPS
+5V +12V [2]
±5% ±5% [2]
0.32 0.12
0.36 0.13
0.25 0.11
0.25 0.05
0.24 0.01
0.87 0.80
1.07 2.47
0.24 0.01
0.41 0.40
0.46 0.42
1.61 1.30
0.42 0.31
0.45 0.33
1.08 1.30
0.83 0.13
0.88 0.14
1.07 0.41
0.78 0.13
0.82 0.14
1.00 0.42
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