Seagate Enterprise Value Benutzerhandbuch
Seagate Terascale HDD Product Manual, Rev. B
7
* During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational
levels.
• Spinup power
Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating
speed.
• Operating Read/Write power and current
Sequential read/write - 128 block transfer, QD=16, minimum 10 data points
Random read/write - 8 block transfer, QD=16, minimum 10 data points
Typical DC - average of average operating currents
Maximum DC - average of max operating currents
• Average Idle Current
Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in
a random track location.
• EPC Idle/Standby/Sleep mode
The current is measured in the desired EPC idle/standby state.
Table 2:
4TB Drive
DC power requirements
6.0Gb mode
Voltage
+5V
+12V
Regulation
±5%
±5%
Avg Idle Current *
0.27
0.27
Advanced Idle Current *
Idle_A
0.182
0.282
Idle_B
0.167
0.237
Idle_C
0.167
0.104
Standby
0.162
0.006
Average Sleep Current
0.162
0.006
Maximum Start Current
DC (peak DC)
3
σ
0.34
0.51
AC (peak DC)
3
σ
0.71
1.73
Peak operating current (random read):
Typical DC
0.29
0.42
Maximum DC
3
σ
0.29
0.42
Peak operating current (random write)
Typical DC
0.29
0.42
Maximum DC
3
σ
0.29
0.42
Peak operating current (sequential read)
Typical DC
0.48
0.30
Maximum DC
3
σ
0.50
0.30
Peak operating current (sequential write)
Typical DC
0.40
0.32
Maximum DC
3
σ
0.47
0.33