Disk device and manufacturing method for disk device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorSatoshi Kuwahara
Life of this patent
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Abstract
According to one embodiment, there is provided a disk device including a head, a disk medium and a controller. The disk medium includes multiple zones concentrically provided. The controller, when two servo patterns corresponding to two adjacent zones are written by the head on a track of a boundary area between the two adjacent zones of the multiple zones, generates timing correction data according to a radial position of the boundary area. The controller writes one servo pattern of the two servo patterns on the track of the boundary area. The controller writes the other servo pattern of the two servo patterns, at a position circumferentially shifted from the one servo pattern in the track of the boundary area, according to the timing correction data.
Claims18
A disk device comprising:
- a head;
- a disk medium that includes multiple zones concentrically provided;
- and
- a controller that, when two servo patterns corresponding to two adjacent zones are written by the head on a track of a boundary area between the two adjacent zones of the multiple zones, generates timing correction data according to a radial position of the boundary, that writes one servo pattern of the two servo patterns on the track of the boundary area, and that writes the other servo pattern of the two servo patterns, at a position circumferentially shifted from the one servo pattern in the track of the boundary area, according to the timing correction data,
- where in the head includes a read element and a write element, and
- the controller,
- when the two servo patterns corresponding to the two zones are written on the track of the boundary area by the write element, generates the timing correction data according to circumferential offsets of the read element and the write element at the radial position of the boundary area.
A manufacturing method for a disk device, comprising:
- in a first case in which a disk device includes a head and a disk medium including multiple zones concentrically provided, and two servo patterns corresponding to two adjacent zones are written, by the head, on a track of a boundary area between the two adjacent zones of the multiple zones in the disk medium, generating timing correction data according to a radial position of the boundary area;
- writing one servo pattern of the two servo patterns on the track of the boundary area, in the first case;
- and
- writing the other servo pattern at a position circumferentially shifted from the one servo pattern on the track of the boundary area, according to the timing correction data, in the first case,
- wherein the head includes a read element and a write element, and
- the generating includes
- generating, in the first case, the timing correction data according to circumferential offsets of the read element and the write element at the radial position of the boundary area.
Dependencies are inferred from the claim text.