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:
Dec. 16, 2008
Filed:
Sep. 22, 2006
Teddy T. C. Chen, Huntington Beach, CA (US);
Jinsheng Bill Jang, Irvine, CA (US);
Jie Yu, Irvine, CA (US);
Jonathan V Nguyen, Laguna Niguel, CA (US);
Teddy T. C. Chen, Huntington Beach, CA (US);
Jinsheng Bill Jang, Irvine, CA (US);
Jie Yu, Irvine, CA (US);
Jonathan V Nguyen, Laguna Niguel, CA (US);
Western Digital Technologies, Inc., Lake Forest, CA (US);
Abstract
A disk drive operable with first and second servo patterns in a perpendicular media recording (PMR) environment is disclosed. The disk drive comprises a head operable with a perpendicular flux, a disk, and a servo controller. The disk includes a plurality of tracks, wherein each track has a plurality of servo sectors utilized in seek operations. The servo sectors of the disk include a first servo pattern between one of an inner diameter (ID) or an outer diameter (OD) of the disk and a middle diameter (MD) of the disk, respectively, and a second servo pattern between the other of the OD or the ID of the disk and the MD of the disk, respectively. The servo controller operates in a first mode when seeking within one of the first or second servo patterns and a second mode when seeking between the first servo pattern and the second servo pattern.