Power Consumption - Seagate ST9655 Series Product Manual

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1.12.2 Power consumption

Power requirements for the ST9655 family drives are listed in the tables
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 at sea level. Active mode current and power are
measured with two spindle rotations between each operation and the
drive in default logical geometry. Startup power is measured from the
time the drive is powered on to the time the drive is ready for normal
operation. Seeking power and currents are measured during one-third-
stroke buffered seeks. Read/Write power and current are measured with
the heads on track.
ST9655AG power consumption
Typical watts RMS
Mode (at nominal voltage)
Spinup 3.79
Active
Seeking 1.78
Read/Write 1.92
Idle 1.03
Standby 0.30
Sleep 0.23
ST9550AG and ST9385AG power consumption
Typical watts RMS
Mode (at nominal voltage)
Spinup 3.90
Active
Seeking 1.50
Read/Write 1.50
Idle 0.90
Standby 0.33
Sleep 0.28
ST9655 Family Product Manual, Rev. A
Typical amps RMS
(at nominal voltage)
0.758
0.356
0.384
0.206
0.060
0.046
Typical amps RMS
(at nominal voltage)
0.780
0.300
0.300
0.180
0.065
0.055