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2.7
Power specifications
The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 2 on page 22.
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-msec
delay, then a 16-sector read followed by a 32-msec 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-disc values shown)
Spinup
Idle* †
Idle* † (with offline activity)
Operating
Standby
Sleep
Table 5:
DC power requirements
Power dissipation (1-disc values shown)
Spinup
Idle* †
Idle* † (with offline activity)
Operating
Standby
Sleep
*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
12
Avg (watts 25° C)
Avg 5V typ amps
—
—
5.0
0.168
5.40
0.153
6.57
0.496
0.79
0.35
0.79
0.35
Avg (watts 25° C)
Avg 5V typ amps
—
—
4.60
0.378
4.50
0.250
6.19
0.656
0.79
0.35
0.79
0.35
DiamondMax 23 Serial ATA Product Manual, Rev. C
Avg 12V typ amps
2.0 (peak)
0.337
0.387
0.341
0.01
0.01
Avg 12V typ amps
2.0 (peak)
0.224
0.240
0.243
0.01
0.01
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