Seagate ST31000528AS Barracuda 7200.12 SATA Product Manual - Page 19

Power specifications - power consumption

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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-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) Spinup Idle* † Idle* † (with offline activity) Operating Standby Sleep Avg (watts 25° C) - 5.0 5.40 6.57 0.79 0.79 Avg 5V typ amps - 0.168 0.153 0.496 0.35 0.35 Avg 12V typ amps 2.0 (peak) 0.337 0.387 0.341 0.01 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 Barracuda 7200.12 Serial ATA Product Manual, Rev. G 13

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Barracuda 7200.12 Serial ATA Product Manual, Rev. G
13
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-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