Patent · US Active

Disk drive employing overlapping servo zones to facilitate servo zone crossing

US8724245B1 · kind B1 · utility

114Cited by

44References

22Claims

0Family size

Assignee

Western Digital Technologies, Inc. · US

Inventors

Steven C. Smith · Richland, US
Charles A. Park · Aromas, US
Siri S. Weerasooriya · Campbell, US
Jenghung Chen · Cupertino, US
Guoxiao Guo · Irvine, US
Wei Guo · Grenoble, FR

Key dates

Filing date	Jun 21, 2012
Grant date	May 13, 2014
Priority date	—
Expiry date	Jul 14, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG11B2020/1232
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A disk drive is disclosed comprising a head actuated over a disk, the disk comprising a plurality of servo sectors defining a plurality of servo tracks, wherein the servo tracks form a plurality of servo zones. A servo data rate of servo sectors in a first servo zone is different than a servo data rate of servo sectors in a second servo zone. A boundary of a first servo zone overlaps with a boundary of a second servo zone over a transition zone. The servo sectors of the first servo zone are interleaved with the servo sectors of the second servo zone within the transition zone. At least one servo parameter is adjusted when the head is over the transition zone in order to transition between the first servo zone and the second servo zone.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.