Momentus Thin Series SATA Product Manual, Rev. A 7
2.9 Power specificationsThe drive receives DC power (+5V) through a native SATA power connector.
2.9.1 Power consumption
Power requirements for the drives are listed in the table on page 7. Typical power measureme nt s ar e base d on
an average of drives tested, under nominal conditions, 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 disk 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 100ms. 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 100ms.
• 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
Table 3: DC power
Power dissipation +5V input average (25° C)
Spinup (max) 1.00A
Seek 1.54W
Read 1.40W
Write 1.78W
Idle, performance* 1.30W
Idle, active* 0.70W
Idle, low power mode* 0.58W
Standby** 0.20W
Sleep 0.20W
*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.
**Standby power is measured at steady state (after 200ms from transition)