Seagate ST3320311CS Pipeline HD.2 Series SATA Product Manual - Page 18

2.8 Power specifications The drive receives DC power (5V or 12V) through a native SATA power connector. Refer to Figure 2 on page 22. 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 5V and 12V 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. • Operating (CE seek profile) Operating power is measured by simulating a typical PVR operating environment, using a 50% write, 50% read algorithm. • 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 Power dissipation (2 disk models) Spinup Idle* Operating Standby Sleep Avg (watts 25° C) - 3.834 4.107 0.699 0.699 Avg 5V typ. amps - 0.223 0.295 0.121 0.121 Avg 12V typ. amps 2.0 (peak) 0.226 0.219 0.008 0.008 Power dissipation (1 disk models) Spinup Idle* Operating Standby Sleep Avg (watts 25° C) - 3.008 3.445 0.707 0.707 Avg 5V typ. amps - 0.248 0.316 0.127 0.127 Avg 12V typ. amps 2.0 (peak) 0.147 0.155 0.006 0.006 *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. Note. Drive supports PHY layer power management. When enabled, a power savings of ~300mw can be achieved in Idle, Standby and Sleep modes. 12 Pipeline HD.2 Series SATA Product Manual, Rev. G