Magnetic disk device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorTakayuki Kawabe
Life of this patent
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Abstract
According to one embodiment, a magnetic disk device includes a disk, a read head, and a control unit. The control unit includes a read processing unit that executes first read processing of moving the read head to n1 radial positions within a period in which the disk makes m1 rotations and reading the data of the track, a comparison unit that derives a first signal of highest quality, and a determination unit that determines a radial position at which the first signal of the highest quality is derived as a first appropriate read position. Where 1≤m1<n1.
Claims20
A magnetic disk device comprising:
- a disk having a track in a recording layer;
- a read head that reads data from the recording layer of the disk;
- and
- a control unit including:
- a read processing unit that executes first read processing of moving the read head to n1 radial positions shifted from each other in a radial direction of the disk within a period in which the disk makes m1 rotations and reading the data of the track at each of the radial positions;
- a comparison unit that compares qualities of a plurality of first signals obtained by reading in the first read processing and derives a first signal of highest quality from among the first signals;
- and
- a determination unit that determines, among n1 radial positions, a radial position at which the first signal of the highest quality is derived as a first appropriate read position appropriate for reading the data of the track,
- where 1≤m1<n1.
Dependencies are inferred from the claim text.