Disk drive prioritizing in-the-field defect scanning based on number of write operations in each of a plurality of defect zones
AssigneeWestern Digital Technologies, Inc.
InventorsWilliam B. Boyle, Chun Sei Tsai, Anthony L. Pei
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Abstract
A disk drive is disclosed comprising a head actuated over a disk, the disk having a plurality of data tracks, wherein a first plurality of data tracks comprises a first plurality of defect scanned data sectors and a second plurality of data tracks comprises a second plurality of unscanned data sectors. The second plurality of data tracks is divided into a plurality of defect zones. A first number of write commands are received from a host to write data to a first defect zone. A first data sector in the first defect zone is defect scanned in response to the first number of write commands to the first defect zone.
Claims24
A disk drive comprising:
- a disk comprising a plurality of data tracks, wherein a first plurality of data tracks comprises a first plurality of defect scanned data sectors and a second plurality of data tracks comprises a second plurality of unscanned data sectors;
- a head actuated over the disk;
- and
- control circuitry operable to;
- divide the second plurality of data tracks into a plurality of defect zones;
- receive a first number of write commands from a host to write data to a first defect zone;
- and
- defect scan a first data sector in the first defect zone in response to the first number of write commands to the first defect zone.
A method of operating a disk drive, the disk drive comprising a head actuated over disk, the disk comprising a plurality of data tracks, wherein a first plurality of data tracks comprises a first plurality of defect scanned data sectors and a second plurality of data tracks comprises a second plurality of unscanned data sectors, the method comprising:
- dividing the second plurality of data tracks into a plurality of defect zones;
- receiving a first number of write commands from a host to write data to a first defect zone;
- and
- defect scanning a first data sector in the first defect zone in response to the first number of write commands to the first defect zone.
Dependencies are inferred from the claim text.