Seagate ST3500312CS manual Power specifications, Power consumption, Spinup power, Idle mode power

2.8Power specifications

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

2.8.1Power 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)		Avg (watts 25° C)	Avg 5V typ. amps	Avg 12V typ. amps
Spinup		—	—	2.0 (peak)
Idle*		3.834	0.223	0.226
Operating		4.107	0.295	0.219
Standby		0.699	0.121	0.008
Sleep		0.811	0.131	0.012
Power dissipation (1 disk models)		Avg (watts 25° C)	Avg 5V typ. amps	Avg 12V typ. amps
Spinup		—	—	2.0 (peak)
Idle*		3.008	0.248	0.147
Operating		3.445	0.316	0.155
Standby		0.707	0.127	0.006
Sleep		0.742	0.134	0.006

*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 Pipeline HD.2 Series SATA Product Manual, Rev. E