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. 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 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
+12V [2]
+5V
+12V [2]
Regulation
[5]
±5%
±5% [2]
±5%
±5% [2]
Avg idle current DC
[1] [7]
0.34
0.30
0.34
0.30
Advanced Idle Current
Idle1
3
σ
0.39
0.33
0.39
0.33
Idle2
3
σ
0.28
0.27
0.29
0.27
Idle3
3
σ
0.28
0.14
0.28
0.14
Standby
3
σ
0.26
0.01
0.27
0.01
Maximum Start current
DC (peak DC)
3
σ
[3]
0.73
0.97
0.73
0.96
AC (peak AC)
3
σ
[3]
0.89
1.58
0.90
1.56
Delayed motor start (max) DC
3
σ
[1] [4]
0.27
0.01
0.27
0.01
Peak operating current: (random read)
Typical DC
[1] [6]
0.44
0.52
0.44
0.52
Maximum DC
3
σ
[1]
0.48
0.54
0.49
0.54
Maximum (peak) DC
3
σ
1.96
1.57
1.93
1.58
Peak operating current: (random write)
Typical DC
[1]
0.42
0.48
0.42
0.48
Maximum DC
3
σ
[1]
0.47
0.51
0.47
0.50
Maximum (peak) DC
3
σ
1.13
1.55
1.05
1.54
Peak operating current: (sequential read)
Typical DC
[1]
0.78
0.32
0.80
0.32
Maximum DC
3
σ
[1]
0.84
0.34
0.86
0.34
Maximum (peak) DC
3
σ
1.15
0.82
1.04
0.78
Peak operating current: (sequential write)
Typical DC
[1]
0.64
0.36
0.65
0.36
Maximum DC
3
σ
[1]
0.72
0.40
0.73
0.40
Maximum (peak) DC
3
σ
0.90
0.81
0.86
0.80
