Western Digital Technologies, Inc.

Eugene Chun-Tsing Wu

Guoxiao Guo

Jie Yu

Duc T Phan

Donald Joseph Brunnett

Chuanwen Ji

Alexander Babinski

Jonathan V Nguyen

John Yin Kwong Li

Teddy T C Chen

Zhenyu Zhang

Alan M Fossen

Tuong M Vu

Tanaat Wut Chayarangkan

Julasak Kungsadankosit

Thitinun Jittramatr

Siam Samuhatananon

Chin Yang Choong

Wei Kiat Chen

An apparatus includes: a media; a head over the media; a read channel, coupled to the head, configured to extract data from the media; control circuitry, coupled to the read channel, configured to execute a read command; and wherein the read channel is further configured to: generate, based on extracting the data from the media, a data condition indicator, and provide, for use by the control circuitry, the data and the data condition indicator.

Electronic system with media scan mechanism and method of operation thereof

A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of servo tracks, wherein each servo track comprises a plurality of servo sectors. A plurality of zones are defined, wherein each zone comprises a plurality of the servo tracks. A metric is generated for each zone, and when the metric for a first zone exceeds a first threshold, feedback compensation values for at least two servo tracks are generated, wherein the feedback compensation values compensate for a written-in error of the servo sectors of each servo track. When the metric for a second zone does not exceed the first threshold, generating feedback compensation values for the second zone is skipped.

Disk drive compensating for repeatable run out selectively per zone

A disk drive is disclosed comprising a plurality of servo sectors that define a plurality of tracks, and a head comprising a read element radially offset from a write element. The read element is positioned over a first track, and the first track is read to generate first read wedge repeatable runout (WRRO) values. A first seek operation of the head positions the read element over a second track, and the second track is read to generate first write WRRO values. The first write WRRO values are used to write the first read WRRO values to the first track. A second seek operation of the head positions the read element over a third track, and the third track is read to generate second write WRRO values. The second write WRRO values are used to write the first write WRRO values to the second track.

Disk drive writing wedge RRO values in a butterfly pattern

Growing community of inventors

Irvine, CA, United States of America

Eugene Chun-Tsing Wu