Disk drive generating quality metric map for a data track while in different configurations
A disk drive is disclosed comprising a disk comprising a plurality of servo tracks defined by servo sectors, a head actuated over the disk, and control circuitry comprising a read channel. A plurality of data tracks are defined relative to the servo tracks, wherein each data track comprises a plurality of segments. The read channel is configured into a read mode in order to first read a first segment of a first data track. During the first read, a quality metric is generated at periodic points along the first segment. After the first read, the read channel is configured into a non-read mode for a predetermined interval. After the predetermined interval, the read channel is configured into the read mode in order to second read the first segment of the first data track and generate the quality metric at the periodic points along the first segment.
Western Digital Technologies, Inc.
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Kevin S. Jinghuan Anthony E.
Curran Chen Pione