07576941 is referenced by 110 patents and cites 68 patents.

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.

Title
Disk drive writing wedge RRO values in a butterfly pattern
Application Number
11/924830
Publication Number
7576941 (B1)
Application Date
October 26, 2007
Publication Date
August 18, 2009
Inventor
Guoxiao Guo
Foothill Ranch
CA, US
Tuong M Vu
Lake Forest
CA, US
Jonathan V Nguyen
Laguna Niguel
CA, US
Jie Yu
Irvine
CA, US
John Yin Kwong Li
Laguna Niguel
CA, US
Eugene Chun Tsing Wu
Irvine
CA, US
Teddy T C Chen
Huntington Beach
CA, US
Agent
Howard H Sheerin Esq
Assignee
Western Digital Technologies
CA, US
IPC
G11B 5/596
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