Western Digital Technologies, Inc.

Boon Sien Chew

Chun Sei Tsai

Thomas Anthony O'Dell

Carl E Barlow

David E Fowler

David E Wachenschwanz

Chirag C Patel

A disk drive is disclosed comprising a disk comprising a plurality of data tracks, and a head actuated over the disk, the head comprising an asperity sensor operable to generate a sensor signal having a magnitude based on a bias setting of the asperity sensor. The asperity sensor is configured with a first bias setting and a first asperity on the disk is detected based on the sensor signal generated at the first bias setting. The asperity sensor is configured with a second bias setting different from the first bias setting and a second asperity on the disk is detected based on the sensor signal generated at the second bias setting.

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Klang, Malaysia

Boon Sien Chew