7 power specifications, 1 power consumption, Power specifications 2.7.1 – Seagate BARRACUDA ST3500410AS User Manual
Page 19: Power consumption
Barracuda 7200.12 Serial ATA Product Manual, Rev. H
13
2.7
Power specifications
2.7.1
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 5.0V and 12.0V 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.
• 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 4:
DC power requirements
Power dissipation (2-disk values shown)
Avg (watts 25° C)
Avg 5V typ amps
Avg 12V typ amps
Spinup
—
—
2.0 (peak)
Idle* †
5.0
0.168
0.337
Idle* † (with offline activity)
5.40
0.153
0.387
Operating
6.57
0.496
0.341
Standby
0.79
0.35
0.01
Sleep
0.79
0.35
0.01
Table 5:
DC power requirements
Power dissipation (1-disk values shown)
Avg (watts 25° C)
Avg 5V typ amps
Avg 12V typ amps
Spinup
—
—
2.0 (peak)
Idle* †
4.60
0.378
0.224
Idle* † (with offline activity)
4.50
0.250
0.240
Operating
6.19
0.656
0.243
Standby
0.79
0.35
0.01
Sleep
0.79
0.35
0.01
*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