1 power consumption, Power consumption – Maxtor STM3160215AS User Manual
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DiamondMax 21 Serial ATA Product Manual, Rev. C
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 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
*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.
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