Power Specifications; Power Consumption - Seagate ST31000322CS Product Manual

2.8

Power specifications

The drive receives DC power (5V or 12V) through a native SATA power connector. Refer to Figure 2 on
page 22.
2.8.1

Power consumption

Power requirements for the drives are listed in the table on page 9. Typical power measurements are based on
an average of drives tested, under nominal conditions, using 5V and 12V input voltage at 25°C ambient tem-
perature.
• Spinup power
Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating
speed.
• Idle mode power
Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in
a random track location.
• Operating (CE seek profile)
Operating power is measured by simulating a typical PVR operating environment, using a 50% write, 50%
read algorithm.
• Standby mode
During Standby mode, the drive accepts commands, but the drive is not spinning, and the servo and read/
write electronics are in power-down mode.
Table 4: DC power requirements
Power dissipation (2 disk models)
Spinup
Idle*
Operating
Standby
Sleep
Power dissipation (1 disk models)
Spinup
Idle*
Operating
Standby
Sleep
*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.
Note. Drive supports PHY layer power management. When enabled, a power savings of ~300mw can be
achieved in Idle, Standby and Sleep modes.
12
Avg (watts 25° C) Avg 5V typ. amps
— —
3.834 0.223
4.107 0.295
0.699 0.121
0.811 0.131
Avg (watts 25° C) Avg 5V typ. amps
— —
3.008 0.248
3.445 0.316
0.707 0.127
0.742 0.134
Pipeline HD.2 Series SATA Product Manual, Rev. E
Avg 12V typ. amps
2.0 (peak)
0.226
0.219
0.008
0.012
Avg 12V typ. amps
2.0 (peak)
0.147
0.155
0.006
0.006