Seagate ST33000651AS Read/write power and current, Operating power and current, Idle mode power

www.seagate.com Drive Specifications

case power consumption, using only random seeks with read or write latency time. This mode is not typical and is provided for worst-case information.

• Read/write power and current

Read/write power is measured with the heads on track, based on a 16-sector write followed by a 32-ms delay, then a 16-sector read followed by a 32-ms delay.

• Operating power and current

Operating power is measured using 40 percent random seeks, 40 percent read/write mode (1 write for each 10 reads) and 20 percent drive idle mode.

• 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.

• 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 2 DC power requirements (3TB)

Power dissipation	Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps
Spinup	—	—	2.0 (peak)
Idle* †	7.37	0.272	0.501
Operating (average)	9.2	0.628	0.506
Standby	0.55	0.082	0.012
Sleep	0.55	0.082	0.012
Table 3 DC power requirements (2TB)
Power dissipation	Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps
Spinup	—	—	2.8 (peak)
Idle* †	6.39	0.27	0.42
Operating (average)	9.23	0.31	0.64
Standby	0.57	0.09	0.01
Sleep	0.57	0.09	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

Note	Drive supports PHY layer power management. When enabled, a power savings of ~300mw can be
	achieved in idle, standby and sleep modes.

Barracuda XT SATA Product Manual, Rev. D 13