Seagate ST3160023AS - Barracuda 160 GB Hard Drive 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
Power dissipation (watts)
Spinup
Idle
[2]
Idle (with offline activity)
Operating (40% r/w, 40% seek, 20% inop.)
Seeking
Standby/Sleep
Table 5: DC power requirements (example of 160GB and 200GB models not supporting NCQ)
Power dissipation (watts)
Spinup
Idle
[2]
Idle (with offline activity)
Operating (40% r/w, 40% seek, 20% inop.)
Seeking
Standby/Sleep
[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
Average 5V typ
(watts, 25° C) amps
— —
7.5 0.487
9.3 0.875
12.0 0.631
12.5 0.405
1.0 0.185
Average 5V typ
(watts, 25° C) amps
— —
7.5 0.482
9.3 0.587
12.1 0.638
12.5 0.412
2.0 0.367
Barracuda 7200.7 Serial ATA Product Manual, Rev. N
[1]
)
12V typ amps
2.8 (peak)
0.422
0.41
0.737
0.873
0.006
12V typ amps
2.8 (peak)
0.424
0.53
0.739
0.87
0.014