The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 2006
Filed:
Sep. 20, 2004
Adjusting track density by changing pes algorithm when servo writing a disk drive from spiral tracks
Robert L. Cloke, Santa Clara, CA (US);
Siri S. Weerasooriya, Campbell, CA (US);
Tehri S. Lee, San Jose, CA (US);
Edgar D. Sheh, San Jose, CA (US);
Wing Ying, Fremont, CA (US);
Robert L. Cloke, Santa Clara, CA (US);
Siri S. Weerasooriya, Campbell, CA (US);
Tehri S. Lee, San Jose, CA (US);
Edgar D. Sheh, San Jose, CA (US);
Wing Ying, Fremont, CA (US);
Western Digital Technologies, Inc., Lake Forest, CA (US);
Abstract
A method and apparatus is disclosed for writing product servo sectors to a disk of a disk drive to define a plurality of data tracks. The disk drive comprises the disk and a head actuated over the disk. The disk comprises a plurality of spiral tracks which are read using the head to synchronize a write clock and to generate a position error signal (PES) according to a PES algorithm used to maintain the head along a first servo track while writing product servo sectors along the first servo track. The PES algorithm is adjusted to seek the head to a second servo track, and the head is used to write product servo sectors along the second servo track.