Seagate SkyHawk Product Manual, Rev. B
13
Drive Specifications
2.6
Power specifications
The drive receives DC power (+5V or +12V) through a native SATA power connector. Refer to
.
2.6.1 Power consumption
Power requirements for the drives are listed in
. 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 elec-
tronics are in power-down mode.
Table 3
DC power requirements for 1TB models
Power dissipation (1-disk values shown)
Avg (watts 25°C)
Avg 5V typ amps
Avg 12V typ amps
Spinup
—
—
1.2
Idle* †
2.502
0.152
0.145
Operating
3.676 0.385
0.145
Standby
0.58
0.096 0.0084
Sleep
0.58
0.096
0.0084
Table 4
DC power requirements for 2TB models
Power dissipation (2-disk values shown)
Avg (watts 25°C)
Avg 5V typ amps
Avg 12V typ amps
Spinup
—
—
1.8
Idle* †
3.56
0.171
0.225
Operating
4.30
0.308
0.233
Standby
0.50
0.09
0.005
Sleep
0.50
0.09
0.005
