Seagate Enterprise Capacity 3.5 HDD v7 SAS Product Manual, Rev. C
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6.2
Power Balance
• Mode page 01h byte 6 bits 0 & 1 define the Active Level
• Active Levels - 00b Default,11b Lowest active power level
6.3
AC power requirements
None.
6.4
DC power requirements
The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive connector.
The standard drive models and the SED drive models have identical hardware, however the security and encryption portion of the drive controller
ASIC is enabled and functional in the SED models. This represents a small additional drain on the 5V supply of about 30mA and a commensurate
increase of about 150mW in power consumption. There is no additional drain on the 12V supply.
Table 3
12TB drive DC power requirements
Notes
12.0Gb mode
(Amps)
(Amps)
(Watts)
Voltage
+5V
+12V [2]
Regulation
[5]
± 5%
± 10% [2]
Avg idle current DCX
[1] [6]
0.309
0.292
5.05
Advanced idle current
Idle A
0.31
0.289
5.02
Idle B
0.241
0.186
3.43
Idle C
0.238
0.124
2.68
Standby
0.23
0.00
1.15
Maximum starting current
(peak DC) DC
0.914
1.729
(peak AC) AC
1.344
2.58
Peak operating current (random read 4K16Q)
Typical DCX
[1]
0.499
0.639
10.16
Maximum DC
0.503
0.656
10.39
Maximum (peak) DC
1.533
2.226
Peak operating current (random write 4K16Q)
Typical DCX
0.382
0.349
6.1
Maximum DC
0.386
0.359
6.24
Maximum (peak) DC
0.974
2.147
Peak operating current (sequential read 64K16Q)
Typical DCX
0.898
0.319
8.32
Maximum DC
0.914
0.326
8.48
Maximum (peak) DC
1.274
1.138
Peak operating current (sequential write 64K16Q)
Typical DCX
0.741
0.32
7.54
Maximum DC
0.758
0.325
7.7
Maximum (peak) DC
0.99
1.824
