Magnetic disk apparatus and method
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorNobuhiro Maeto
Life of this patent
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Abstract
According to an embodiment, tracks on a magnetic disk each include a long-distance sector having a length in the circumferential direction covering two or more servo sectors. A controller executes an acquisition operation to acquire one or more evaluation amounts on the basis of a track pitch in each of the two or more servo sectors included in a portion adjacent to the long-distance sector. The controller executes a protection operation to protect data of an adjacent track in a case where a total value of the one or more evaluation amounts exceeds a first threshold value.
Claims10
A magnetic disk apparatus comprising:
- a magnetic disk on which multiple tracks are provided, the multiple tracks each including a long-distance sector;
- a magnetic head that executes data writing and data reading to and from the multiple long-distance sector;
- and
- a controller that executes an acquisition operation and a protection operation in a write operation to a first portion of a first track being one of the multiple tracks, the first portion being adjacent to a long-distance sector in a second track adjacent to the first track,
- the acquisition operation being executed to acquire an evaluation amount corresponding to a squeeze amount of a track pitch in a range between two ends in the circumferential direction of the first portion,
- the protection operation being executed to protect data of the second track on the basis of the evaluation amount.
Dependencies are inferred from the claim text.