Data storage device erasing multiple adjacent data tracks to recover from inter-track interference
First Claim
1. A data storage device comprising:
- a disk comprising a plurality of data tracks;
a head actuated over the disk; and
control circuitry configured to perform a retry operation for a target data track by;
positioning the head at a first radial location and first erasing at least part of a first data track adjacent the target data track;
after the first erasing, first reading the target data track to first recover target data recorded in the target data track;
when the first recovery fails, positioning the head at a second radial location and second erasing more of the first data track; and
after the second erasing, second reading the target data track to second recover the target data recorded in the target data track,wherein;
the first erasing erases at least part of a second data track adjacent the first data track; and
the first erasing erases more of the second data track than the first data track.
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Accused Products
Abstract
A data storage device is disclosed comprising a disk comprising a plurality of data tracks, and a head actuated over the disk. A retry operation for a target data track is performed by positioning the head at a first radial location and first erasing at least part of a first data track adjacent the target data track. After the first erasing, the target data track is first read to first recover target data recorded in the target data track. When the first recovery fails, the head is positioned at a second radial location and more of the first data track is second erased. After the second erasing, the target data track is second read to second recover the target data recorded in the target data track.
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Citations
12 Claims
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1. A data storage device comprising:
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a disk comprising a plurality of data tracks; a head actuated over the disk; and control circuitry configured to perform a retry operation for a target data track by; positioning the head at a first radial location and first erasing at least part of a first data track adjacent the target data track; after the first erasing, first reading the target data track to first recover target data recorded in the target data track; when the first recovery fails, positioning the head at a second radial location and second erasing more of the first data track; and after the second erasing, second reading the target data track to second recover the target data recorded in the target data track, wherein; the first erasing erases at least part of a second data track adjacent the first data track; and the first erasing erases more of the second data track than the first data track. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of operating a data storage device, the method comprising:
performing a retry operation for a target data track of a disk by; positioning a head at a first radial location and first erasing at least part of a first data track adjacent the target data track; after the first erasing, first reading the target data track to first recover target data recorded in the target data track; when the first recovery fails, positioning the head at a second radial location and second erasing more of the first data track; and after the second erasing, second reading the target data track to second recover the target data recorded in the target data track, wherein; the first erasing erases at least part of a second data track adjacent the first data track; and the first erasing erases more of the second data track than the first data track. - View Dependent Claims (8, 9, 10, 11, 12)
Specification