Disk drive employing sector-reconstruction-interleave sectors each storing redundancy data generated in response to an interleave of data sectors
AssigneeWestern Digital Technologies, Inc.
InventorMichael S. Rothberg
Life of this patent
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Abstract
A disk drive is disclosed comprising a disk, a head, and an actuator for actuating the head radially over the disk. The disk comprises a plurality of tracks, each track comprises a plurality of data sectors for storing data and a plurality of sector-reconstruction-interleave (SRI) sectors for storing redundancy data. The redundancy data stored in a selected one of the SRI sectors is generated in response to the data stored in an interleave of the data sectors corresponding to the selected one of the SRI sectors.
Claims21
A disk drive comprising:
- a disk;
- a head;
- and
- an actuator for actuating the head radially over the disk,
- wherein:
- (a) the disk comprises a plurality of tracks;
- (b) each track comprises a plurality of data sectors for storing data and a plurality of sector-reconstruction-interleave (SRI) sectors for storing redundancy data;
- (c) the redundancy data stored in a selected one of the SRI sectors is generated in response to the data stored in an interleave of the data sectors corresponding to the selected one of the SRI sectors;
- (d) at least one of the tracks comprises n SRI sectors corresponding to n interleaves of the data sectors, where n is greater than one;
- and
- (e) each interleave of data sectors comprises every nth data sector offset by the interleave number.
A disk drive comprising:
- (a) a disk comprising a plurality of tracks, each track for storing a plurality of data sectors and a plurality of sector-reconstruction-interleave (SRI) sectors, wherein:
- at least one of the tracks stores n SRI sectors corresponding to n interleaves of the data sectors, where n is greater than one;
- and
- each interleave of data sectors comprises every nth data sector offset by the interleave number,
- (b) a head;
- (c) an actuator for actuating the head radially over the disk;
- and
- (d) a disk controller for:
- writing data to the data sectors;
- generating redundancy data in response to the data stored in an interleave of the data sectors;
- and
- writing the redundancy data to a respective SRI sector.
A disk controller for use in a disk drive comprising a disk comprising a plurality of tracks, each track for storing a plurality of data sectors and a plurality of sector-reconstruction-interleave (SRI) sectors, a head, and an actuator for actuating the head radially over the disk, the disk controller comprising:
- a means for writing data to the data sectors;
- a means for generating redundancy data in response to the data stored in an interleave of the data sectors;
- and
- a means for writing the redundancy data to a respective SRI sector,
- wherein:
- at least one of the tracks stores n SRI sectors corresponding to n interleaves of the data sectors, where n is greater than one;
- and
- each interleave of data sectors comprises every nth data sector offset by the interleave number.
Dependencies are inferred from the claim text.