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:
Oct. 08, 2013
Filed:
Oct. 06, 2011
Aswartha Narayana, Aliso Viejo, CA (US);
Chuanwen Ji, Irvine, CA (US);
Duc T. Phan, Saratoga, CA (US);
Min Chen, San Jose, CA (US);
Hengchang Guo, Rancho Santa Margarita, CA (US);
Aswartha Narayana, Aliso Viejo, CA (US);
Chuanwen Ji, Irvine, CA (US);
Duc T. Phan, Saratoga, CA (US);
Min Chen, San Jose, CA (US);
Hengchang Guo, Rancho Santa Margarita, CA (US);
Western Digital Technologies, Inc., Irvine, CA (US);
Abstract
A disk drive is disclosed comprising a head actuated over a disk, the disk comprising a plurality of servo tracks defined by a plurality of servo sectors. An estimated radial location of the head is generated in response to an actuator control signal. A Gray coded track ID is detected from reading a servo sector, and decoded into a detected track ID. A burst position error signal (PES) is generated from reading servo bursts in the servo sector, wherein the burst PES represents a detected fractional servo track offset of the head. When the detected track ID is corrupt, a corrected track ID is generated using the estimated radial location and the burst PES, and the actuator control signal is adjusted in response to the corrected track ID and the burst PES.