Seagate STM3320820AS DiamondMax 21 SATA Product Manual - Page 26
STM3160815AS, STM3160215AS, STM380815AS, STM380215AS and STM340215AS
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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 STM3500630AS, STM3320620AS, STM3320820AS, STM3250820AS STM3160815AS, STM3160215AS, STM380815AS, STM380215AS and STM340215AS Power dissipation Avg (watts 25° C) Avg 5V typ amps Spinup - - Idle* 9.30 0.611 Seeking (random, 20% idle) 12.60 0.613 Standby and Sleep 0.80 0.106 Avg 12V typ amps 2.8 (peak) 0.520 0.795 0.023 STM3250310AS Power dissipation Spinup Idle* Seeking (random, 20% idle) Standby and Sleep Avg (watts 25° C) - 5.35 8.35 1.80 Avg 5V typ amps - 0.528 0.573 0.035 Avg 12V typ amps 2.0 (peak) 0.226 0.458 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