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Seagate ST450MP0044 - 512E ユーザーズマニュアル

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S
EAGATE 
E
NTERPRISE 
P
ERFORMANCE 
15K HDD 
AND 
E
NTERPRISE 
T
URBO 
SSHD SAS P
RODUCT 
M
ANUAL
, R
EV
. B
 
 21
  
[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 sele ction 
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 6.3.1, "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 maxi mum 
track.
Table 4
600GB models DC power requirements
Notes
600GB Base - Hybrid
3.0 Gb mode
6.0 Gb mode
Parameter
(Amps)
(Amps)
(Amps)
(Amps)
Voltage
+5V
+5V
Regulation
[5]
±5%
±5% [2]
±5%
±5% [2]
Avg idle current DC
0.34
0.30
0.34
0.30
Advanced Idle Current
Idle1
3σ
0.39
0.33
0.39
0.33
Idle2
3σ
0.28
0.27
0.29
0.27
Idle3
3σ
0.28
0.14
0.28
0.14
Standby
3σ
0.26
0.01
0.27
0.01
Maximum Start current
DC (peak DC)
3σ
0.73
0.97
0.73
0.96
AC (peak AC)
3σ
0.89
1.58
0.90
1.56
Delayed motor start (max) DC
3σ
0.27
0.01
0.27
0.01
Peak operating current: (random read)
     Typical DC
0.44
0.52
0.44
0.52
     Maximum DC
3σ
0.48
0.54
0.49
0.54
     Maximum (peak) DC
3σ
1.96
1.57
1.93
1.58
Peak operating current: (random write)
     Typical DC
0.42
0.48
0.42
0.48
     Maximum DC
3σ
0.47
0.51
0.47
0.50
     Maximum (peak) DC
3σ
1.13
1.55
1.05
1.54
Peak operating current: (sequential read)
     Typical DC
0.78
0.32
0.80
0.32
     Maximum DC
3σ
0.84
0.34
0.86
0.34
     Maximum (peak) DC
3σ
1.15
0.82
1.04
0.78
Peak operating current: (sequential write)
     Typical DC
0.64
0.36
0.65
0.36
     Maximum DC
3σ
0.72
0.40
0.73
0.40
     Maximum (peak) DC
3σ
0.90
0.81
0.86
0.80