Power Specifications; Power Consumption - Seagate ST1.2 - Series 8 GB Removable Hard Drive Product Manual

2.7

Power specifications

The drive receives DC power (+3.3V or +5V) through the CompactFlash interface connector for ST68022CF,
ST66022CF and ST64022CF models, and (+3.3V or +5V) through the Flex interface connector for
ST68022FX, ST66022FX and ST64022FX models.
2.7.1

Power consumption

Power requirements for the drives are listed in the table on page 8. Typical power measurements are based on
an average of drives tested, under nominal conditions, using +3.3V and +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 drive spindle reaches operating speed.
• Seek mode
During seek mode, the read/write actuator arm moves toward a specific position on the disc surface and does
not execute a read or write operation. Servo electronics are active. Seek mode power is measured 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, at the moment while the head is writing/reading
from/to disc. It is performed with 100 percent duty cycle of write/read operation.
• Idle mode power, low
Spindle motor is working normally with actuator unloaded to the parked position.
• Standby mode / Sleep 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.
ST1.2 Series Product Manual, Rev. B 7