Patent · US Active

Disk drive biasing refresh zone counters based on write commands

US7974029B2 · kind B2 · utility

146Cited by

86References

24Claims

0Family size

Assignee

Western Digital Technologies, Inc. · US

Inventors

Chun Sei Tsai · Tustin, US
Sang Huynh · Corona, US
Anthony L. Pei · Irvine, US
Don Brunnett · Pleasanton, US
Jahangir John Kasraee · Irvine, US
Kent W. Gibbons · Yorba Linda, US

Key dates

Filing date	Jul 31, 2009
Grant date	Jul 5, 2011
Priority date	—
Expiry date	Aug 4, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG11B2220/2516
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A disk drive is disclosed comprising a disk comprising a plurality of tracks, and a head actuated over the disk. A plurality of refresh zones are defined, wherein each refresh zone corresponds to a plurality of the tracks. Data is written to a first refresh zone, and a first zone counter is updated for a second refresh zone at a first rate. Data is written to a third refresh zone, and the first zone counter is updated for the second refresh zone at a second rate different than the first rate.

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