Maxtor STM340215AS Power consumption, Spinup power, Idle mode power, Seek mode, Standby mode

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 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.

• Seek mode

During seek mode, the read/write actuator arm moves toward a specific position on the disc surface and does not execute a read or write operation. Servo electronics are active. Seek mode power represents the worst-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.

• 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 7: DC power requirements

STM3500630AS, STM3320620AS, STM3320820AS, STM3250820AS

STM3160815AS, STM3160215AS, STM380815AS, STM380215AS and STM340215AS

Power dissipation	Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps
Spinup	—	—	2.8 (peak)
Idle*	9.30	0.611	0.520
Seeking (random, 20% idle)	12.60	0.613	0.795
Standby and Sleep	0.80	0.106	0.023
STM3250310AS
Power dissipation	Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps
Spinup	—	—	2.0 (peak)
Idle*	5.35	0.528	0.226
Seeking (random, 20% idle)	8.35	0.573	0.458
Standby and Sleep	1.80	0.035	0.008
STM3250824AS
Power dissipation	Avg (watts 25° C)	Avg 5V typ amps	Avg 12V typ amps
Spinup	—	—	2.8 (peak)
Idle*	7.75	0.512	0.432
Seeking (random, 20% idle)	11.35	0.497	0.738
Standby and Sleep	1.24	0.221	0.011

*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.

20 DiamondMax 21 Serial ATA Product Manual, Rev. C