Disk drive predicting spindle motor failure by evaluating current draw relative to temperature
AssigneeWestern Digital Technologies, Inc.
InventorsYanan Huang, Chuanwen Ji, Duc T. Phan, Chui Lyn Cheong
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Abstract
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.
Claims16
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;
- and
- predict failure of the spindle motor based on the operating current draw, the operating temperature, and the first baseline relationship.
A method of operating a disk drive, the disk drive comprising a head actuated over a disk, and a spindle motor operable to rotate the disk, the method comprising:
- generating a first baseline relationship of a baseline current draw of the spindle motor over a temperature range;
- measuring an operating current draw of the spindle motor and a corresponding operating temperature;
- and
- predicting failure of the spindle motor based on the operating current draw, the operating temperature, and the first baseline relationship.
Dependencies are inferred from the claim text.