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EE25.2 Series Product Manual, Rev. B
2.9.1 Power consumption
Power requirements for the drives are listed in the table below. Typical power measurements are based on an
average of drives tested, under nominal conditions, using 5.0V input voltage at 25°C ambient temperature.
• Spinup power
Spinup power is measured from the time of power -on to the time that the dr ive spindle reaches opera ting speed.
• Seek mode
During seek mode, the read/write actuator arm moves towar d a specif ic position o n the disc surfa ce and does
not execute a read or write operation. Servo electronics are active. Seek mode power is measure d based on
three random seek operations every 100 msecs. This mode is not typical.
•Read/write power and current
Read/write power is measured with the heads on track, based on three 63 sector read or write operations
every 100 msecs.
• 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 model l
* During periods of drive idle, some offline activity may occur according to the S.M.A.R.T . specification, which may increase acoustic an d
power to operational levels.
Power dissipation
+5V Average
85C 25C -20C -30C
SATA Watts Amps Watts Amps Watts Amps Watts Amps
Spinup, typical 5. 0 1.0 5.0 1.0 5.0 1.0 6.50 1.30
Spinup, maximum 6.25 1.25 6.70 1.34 6.95 1.39 7.75 1.55
Idle, active* 2.50 0.50 2.35 0.47 3.45 0.69 4.35 0.87
Seeking 2.60 0.52 2.45 0.49 3.45 0.69 4.25 0.85
Read 3.25 0.65 3.00 0.60 3.95 0.79 4.75 0.95
Write 2.40 0.48 2.30 0.46 3.25 0. 65 4.10 0.82
Standby 1.30 0.26 1.10 0.22 1.05 0.21 1.05 0.21
Sleep 1.30 0.26 1.10 0.22 1.05 0.21 1.05 0.21
PATA
Spinup, typical 5. 0 1.0 5.0 1.0 5.0 1.0 6.50 1.30
Spinup, maximum 6.25 1.25 6.70 1.34 6.95 1.39 7.75 1.55
Idle, active* 1.55 0.31 1.65 0.33 2.75 0.55 3.55 0.71
Seeking 1.55 0.31 1.65 0.33 2.75 0.55 3.55 0.71
Read 1.20 0.24 1.40 0.28 2.30 0.46 3.20 0.64
Write 1.45 0.29 1.50 0.30 2.65 0. 53 3.45 0.69
Standby 0.30 0.06 0.26 0.05 0.25 0.05 0.25 0.05
Sleep 0.30 0.06 0.26 0.05 0.25 0.05 0.25 0.05