Disk drive predicting spindle motor failure by evaluating current draw relative to temperature

摘要

A disk drive is disclosed comprising a head actuated over a disk, and a spindle motor operable to rotate the disk. A baseline relationship is generated between a baseline current draw of the spindle motor over a temperature range. An operating current draw of the spindle motor is measured and a corresponding operating temperature is measured. Failure of the spindle motor is predicted based on the operating current draw, the operating temperature, and the baseline relationship.

主权项

1. A disk drive comprising:
a disk; a head actuated over the disk; a spindle motor operable to rotate the disk; and control circuitry operable to:
generate a first baseline relationship of a baseline current draw of the spindle motor over a temperature range;measure an operating current draw of the spindle motor and a corresponding operating temperature; andpredict failure of the spindle motor based on the operating current draw, the operating temperature, and the first baseline relationship.