Seagate ST3200822AS Product Manual - Page 16

• 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 4: DC power requirements (example of 160GB models supporting NCQ[1]) Power dissipation (watts) Spinup Idle Idle (with offline activity) [2] Operating (40% r/w, 40% seek, 20% inop.) Seeking Standby/Sleep Average (watts, 25° C) - 7.5 9.3 12.0 12.5 1.0 5V typ amps - 0.487 0.875 0.631 0.405 0.185 12V typ amps 2.8 (peak) 0.422 0.41 0.737 0.873 0.006 Table 5: DC power requirements (example of 160GB and 200GB models not supporting NCQ) Power dissipation (watts) Spinup Idle Idle (with offline activity) [2] Operating (40% r/w, 40% seek, 20% inop.) Seeking Standby/Sleep Average (watts, 25° C) - 7.5 9.3 12.1 12.5 2.0 5V typ amps - 0.482 0.587 0.638 0.412 0.367 12V typ amps 2.8 (peak) 0.424 0.53 0.739 0.87 0.014 [1] NCQ may not be enabled during power measurements. [2] 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. 8 Barracuda 7200.7 Serial ATA Product Manual, Rev. N