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10 Barracuda Serial ATA V Product Manual, Rev. B
*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.
Table 3: DC power requirements
Power dissipation
(watts, ST3120023AS)
Average
(watts, 25° C)
5V typ
amps
12V typ
amps
Spinup — — 2.8 (peak)
Idle 7.5 0.74 0.32
Idle* (with offline activity) 9.5 0.74 0.48
Operating 40% r/w.
40% seek, 20% inop. 13 0.74 0.79
Seeking 13.5 0.73 0.82
Standby 1.8 0.34 0.01
Sleep 1.8 0.34 0.01