Disk drive biasing refresh zone counters based on write commands
AssigneeWestern Digital Technologies, Inc.
InventorsChun Sei Tsai, Sang Huynh, Anthony L. Pei, Don Brunnett, Jahangir John Kasraee, Kent W. Gibbons
Life of this patent
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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.
Claims24
A disk drive comprising:
- a disk comprising a plurality of tracks;
- a head actuated over the disk;
- and
- control circuitry operable to:
- define a plurality of refresh zones, wherein each refresh zone corresponds to a plurality of the tracks;
- first write data to a first refresh zone, and update a first zone counter for a second refresh zone at a first rate;
- and
- second write data to a third refresh zone, and update the first zone counter for the second refresh zone at a second rate different than the first rate.
A disk drive comprising:
- a disk comprising a plurality of tracks;
- a head actuated over the disk;
- and
- control circuitry operable to:
- define a plurality of refresh zones, wherein each refresh zone corresponds to a plurality of the tracks;
- write data to a first refresh zone in response to a write command;
- and
- update a first zone counter for the first refresh zone at a first rate based on a type of the write command.
A method of operating a disk drive, the disk drive comprising a disk comprising a plurality of tracks, and a head actuated over the disk, the method comprising:
- defining a plurality of refresh zones, wherein each refresh zone corresponds to a plurality of the tracks;
- first writing data to a first refresh zone, and updating a first zone counter for a second refresh zone at a first rate;
- and
- second writing data to a third refresh zone, and updating the first zone counter for the second refresh zone at a second rate different than the first rate.
A method of operating a disk drive, the disk drive comprising a disk comprising a plurality of tracks, and a head actuated over the disk, the method comprising:
- defining a plurality of refresh zones, wherein each refresh zone corresponds to a plurality of the tracks;
- writing data to a first refresh zone in response to a write command;
- and
- updating a first zone counter for the first refresh zone at a first rate based on a type of the write command.
Dependencies are inferred from the claim text.