Interlaced magnetic recording band isolation
AssigneeSeagate Technology LLC
InventorsWei Loon Ng, Brian T. Edgar
Life of this patent
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Abstract
Methods and apparatus for allocating logical sectors and bands to store data on interlaced magnetic recording tracks. The systems and methods include formatting a data storage medium to include a plurality of bands, each band of the plurality of bands including a plurality of tracks, the plurality of tracks including a subset of top tracks interlaced with a subset of bottom tracks, and each track of the plurality of tracks including a number of sectors, formatting a first band of the plurality of bands, determining an isolation region of the first band, and formatting a second band of the plurality of bands responsive to determining the isolation region of the first band.
Claims20
A data storage formatting method comprising:
- filling, with supposed data, a subset of bottom tracks comprising sectors interlaced with a subset of top tracks comprising sectors;
- iteratively moving supposed data from a sector of the subset of bottom tracks to a sector of the subset of top tracks until a number of empty top tracks inward from an end non-empty bottom track is zero;
- and
- assigning an isolation region responsive to a determination that the subset of bottom tracks has a non-full track, assigning that portion of the non-full track as a first portion of the isolation region, and assigning a corresponding portion of an adjacent top track as a second portion of the isolation region, or,
- responsive to a determination that the subset of bottom tracks does not have a non-full track, assigning no more than an entire adjacent top track as the isolation region.
A controller for a disc drive assembly configured to format a data storage medium of the assembly, the controller configured to:
- fill a subset of bottom tracks comprising sectors interlaced with a subset of top tracks comprising sectors with supposed data;
- iteratively move supposed data from a sector of the subset of bottom tracks to a sector of the subset of top tracks, until a number of empty top tracks inward from an end non-empty bottom track is zero;
- and
- assign an isolation region responsive to a determination that the subset of bottom tracks has a non-full track, assign that portion of the non-full track as a first portion of the isolation region, and assign a corresponding portion of an adjacent top track as a second portion of the isolation region, or if the subset of bottom tracks does not have a non-full track, assign no more than an entire adjacent top track as the isolation region.
A controller for a disc drive assembly configured to format a data storage medium of the assembly, the controller comprising:
- means to fill a subset of bottom tracks comprising sectors interlaced with a subset of top tracks comprising sectors with supposed data;
- means to iteratively move supposed data from a sector of the subset of bottom tracks to a sector of the subset of top tracks, until a number of empty top tracks inward from an end non-empty bottom track is zero;
- and
- means to, responsive to a determination that the subset of bottom tracks has a non-full track:
- assign an isolation region,
- assign that portion of the non-full track as a first portion of the isolation region, and
- assign a corresponding portion of an adjacent top track as a second portion of the isolation region, or
- means to, responsive to a determination that the subset of bottom tracks does not have a non-full track, assign no more than an entire adjacent top track as the isolation region.
Dependencies are inferred from the claim text.