Seagate BARRACUDA XT ST33000651AS - Manual (Page 13)

Barracuda XT SATA Product Manual, Rev. D 13
www.seagate.com Drive Specifications
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.
• Read/write power and current
Read/write power is measured with the heads on track, based on a 16-sector write followed by a 32-ms delay,
then a 16-sector read followed by a 32-ms delay.
• 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 2 DC power requirements
Power dissipation Avg (watts 25° C) Avg 5V typ amps Avg 12V typ amps
Spinup — — 2.0 (peak)
Idle* † 7.37 0.272 0.501
Operating (average) 9.2 0.628 0.506
Standby 0.55 0.082 0.012
Sleep 0.55 0.082 0.012
(3TB)
Table 3 DC power requirements
Power dissipation Avg (watts 25° C) Avg 5V typ amps Avg 12V typ amps
Spinup — — 2.8 (peak)
Idle* † 6.39 0.27 0.42
Operating (average) 9.23 0.31 0.64
Standby 0.57 0.09 0.01
Sleep 0.57 0.09 0.01
(2TB)
*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.
†5W IDLE with DIPLM Enabled
Note
Drive supports PHY layer power management. When enabled, a power savings of ~300mw can be
achieved in idle, standby and sleep modes.