Seagate ST3250311SV Power specifications, Power consumption and DC power requirements, Operating

2.8Power specifications

The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 1 on page 20.

2.8.1Power consumption and DC power requirements

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 5.0V and 12.0V input voltage at 25°C ambient temperature.

• 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

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 3:	DC power requirements (2-disk)
Power dissipation (2-disk values shown)		Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps
Spinup		—	—	2.0 (peak)
Idle*†		5.0	0.168	0.337
Idle*† (with offline activity)		5.40	0.153	0.387
Operating		6.57	0.496	0.341
Standby		0.79	0.35	0.01
Sleep		0.79	0.35	0.01

Table 4:	DC power requirements (1-disk)
Power dissipation (1-disk values shown)		Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps
Spinup		—	—	2.0 (peak)
Idle*†		4.60	0.378	0.224
Idle*† (with offline activity)		4.50	0.250	0.240
Operating		6.19	0.656	0.243
Standby		0.79	0.35	0.01
Sleep		0.79	0.35	0.01

*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.

†5W IDLE with DIPLM Enabled

10 SV35.5 Series SATA Product Manual, Rev. C