Western Digital Technologies, Inc.

Taylor Norito Kelena Watanabe

Michael Troy Nicholls

A data storage device is disclosed comprising a head actuated over a disk, and a spindle motor configured to rotate the disk. A speed of the spindle motor is sampled, and an error signal is generated based on a difference between the sampled speed and a target speed. A sliding mode control signal for controlling a speed of the spindle motor is generated based on a first non-zero gain when the error signal is greater than zero and less than a first positive threshold, and a second non-zero gain when the error signal is greater than the first positive threshold.

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Tustin, CA, United States of America

Taylor Norito Kelena Watanabe