Disk drive prioritizing in-the-field defect scanning based on number of write operations in each of a plurality of defect zones
First Claim
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1. 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.
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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.
201 Citations
24 Claims
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1. A disk drive comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. 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:
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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. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification