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Western Digital Hard Disk Drive OEM Specification
6.3.2.2
SATA, 4TB, Block Size 4k, 6Gb/sec
Model: SATA @ 6Gb/sec
4TB Model
Block size: 4k
Current
Current
Power
IO/Sec
+5V Amp
+12V Amp
Watts
Start up Peak DC [1]
0.28
1.54
Start up Peak AC
0.46
1.96
Idle_0, Avg
0.21
0.32
4.9
Idle Ripple
0.12
0.26
Random Peak [4]
0.52
1.78
Random RW 8kB Qd=1 Avg
40
0.23
0.41
6.1
Random RW 4kB Qd=1 Avg
139
0.23
0.51
7.3
Random RW 4kB Qd=4 Avg
206
0.24
0.74
10.1
Random R 4kB Qd=8 Avg [5]
233
0.24
0.73
9.9
Sequential Read Peak [4]
0.64
Sequential Read Avg [2]
0.52
0.34
6.7
Sequential Write Peak [4]
0.49
Sequential Write Avg [2]
0.42
0.38
6.7
Power Save Modes
Current
Power
Power
Saved
Recovery [1]
(PHY state: Active)
+5V Amp
+12V Amp
Watts
Watts[3]
12V DC
Peak
12V AC
Peak
Idle_A
0.21
0.32
4.9
0.0
Idle_B
0.12
0.27
3.9
1.1
Idle_C
0.12
0.20
3.0
1.9
1.00
1.17
Standby_Y
0.12
0.20
3.0
1.9
1.00
1.17
Sleep, Standby_Z
0.11
0.005
0.6
4.3
1.56
1.78
PHY power condition
Partial
0.2
Slumber
0.2
Notes
Sample size
10 HDD per model
Temperature
DE temperature = 40°C (25°C for Spin up)
Write Cache Enable
Off
Bandwidth
All measurements are bandwidth limited to 20MHz
PHY
Single port, 6Gb/s
[1] 200ms windowed average
[2] Max transfer rate
[3] Power saved compared to Idle_0
[4] Maximum single peak in test samples
[5] Maximum power workload
Table 16 SATA Power Consumption, 4TB, 4k