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6.3.2 Power supply current
Table 12 SATA power consumption
(SATA)
Serial ATA @ 6Gb/sec
22/24TB CMR Model
+12V Current
IO/Sec
+5V Current
(Amp)
(Amp)
Power (Watts)
Max Peak Operational [1]
1.03
2.00
Start up Peak DC [2]
0.67
1.25
Start up Peak AC [3]
0.88
2.00
Idle_0 Ave.
0.33
0.32
5.5
Idle Ripple
0.14
0.27
Random Read 4KB Qd=4 Peak [1]
0.96
1.84
Random Read 4KB Qd=4 Ave.
123
0.44
0.57
9.0
Random Read 4KB Qd=8 Peak [1]
0.97
1.84
Random Read 4KB Qd=8 Ave.
148
0.44
0.60
9.4
Random Read 4KB Qd=16 Peak [1]
0.91
1.82
Random Read 4kB Qd=16 Ave.
177
0.44
0.54
8.7
Random Write 4KB Qd=4 WCE=0 Peak [1]
0.96
1.70
Random Write 4KB Qd=4 WCE=0 Ave.
575
0.49
0.33
6.4
Random Write 4KB Qd=16 WCE=0 Peak [1]
0.96
1.71
Random Write 4kB Qd=16 WCE=0 Ave.
568
0.49
0.33
6.4
Random RW 50/50 8KB Qd=1 WCE=0 Peak @ 40IOPs [1]
0.95
1.76
Random RW 50/50 8KB Qd=1 WCE=0 Ave. @ 40IOPs
40
0.45
0.37
6.7
Random RW 50/50 4KB Qd=4 WCE=0 Peak [1]
0.95
1.81
Random RW 50/50 4KB Qd=4 WCE=0 Ave.
219
0.46
0.51
8.4
Random RW 70/30 4KB Qd=4 WCE=0 Peak [1]
0.94
1.80
Random RW 70/30 4KB Qd=4 WCE=0 Ave.
162
0.45
0.49
8.1
Random RW 50/50 4KB Qd=1 WCE=0 Peak [1]
0.95
1.81
Random RW 50/50 4KB Qd=1 WCE=0 Ave.
150
0.45
0.51
8.3
Max Power Workload
Random Read 4KB Qd=8 Peak [1]
0.97
1.84
Random Read 4KB Qd=8 Ave.
148
0.44
0.60
9.4
Sequential Read 64KB Qd=16 Peak [1]
MiB/s
0.99
Sequential Read 64KB Qd=16 Ave. [4]
257/265
0.79
0.31
7.6
Sequential Write 64KB Qd=16 Peak [1]
MiB/s
1.00
Sequential Write 64KB Qd=16 Ave. [4]
257/264
0.79
0.31
7.6
Power Save Mode
+5V Current
+12V Current
(Amp)
(Amp)
Power (Watts)
Power Saved
(Watts) [5]
Idle_A
0.33
0.32
5.5
0.0
Idle_B
0.24
0.21
3.7
1.8
Idle_C
0.24
0.16
3.2
2.3
Standby_Y
0.24
0.16
3.2
2.3
Standby_Z
0.23
0.008
1.2
4.3
Sleep
0.23
0.008
1.2
4.3
PHY power condition
Port A Power Saved (Watts)
Partial
0.04
Slumber
0.16
Notes
Sample size
9 HDDs per model
Temperature
HDD reported temperature = 40degC (25degC for Start up)
Sampling rate
62.5K measurements/sec
PHY
Single port, 6Gb/s
[1] Peak current is established via the average current in a 16 usec moving window. The peak values of the HDDs in the population are
then averaged and reported.
[2] Start up DC (average) current is measured within a 200ms sliding window. The peak DC values of the HDDs in the population are
then averaged and reported.
[3] Start up AC current is sampled at 62.5kHz. The peak sample values of the HDDs in the population are then averaged and reported.
[4] Average measured at sustained sequential streaming rate.
[5] Power saved compared to Idle_0
32
Hard Disk Drive Specification