Disk storage apparatus and data protection method
AssigneeKabushiki Kaisha Toshiba
InventorsTatsuo Nitta, Takayuki Kawabe
Life of this patent
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Abstract
A disk storage apparatus according to one embodiment includes a head, a storage device, a write module and a controller. The head writes data on a disk. The storage device has a storage area for temporarily storing the data written by the head. The write module writes data to tracks on a disk, while partially overlapping the data with previously written data to adjacent track. The controller detects a drift-off write of the head while writing data, determines a drift-off write area in which the drift-off write is occurred, and protects the data written in the storage area, if the data is written in the drift-off write area.
Claims18
A disk storage apparatus comprising:
- a head configured to write data on a disk;
- a storage device comprising a storage area for temporarily storing the data written by the head;
- a write module configured to write data to tracks on a disk, while partially overlapping the data with previously written data to adjacent track;
- and
- a controller,
- wherein the controller detects a drift-off write of the head while writing data, determines a drift-off write area in which the drift-off write is occurred, and protects the data written in the storage area without rewriting the protected data in the drift-off write area, if the data is written in the drift-off write area.
A data protection method for use in a data storage apparatus in which a head performs a write process of writing data to tracks on a disk, while partially overlapping the data with previously written data to adjacent track, the method comprising:
- detecting a drift-off write of the head while data being written;
- determining a drift-off write area in which the drift-off write is occurred;
- and
- protecting data in a storage area for temporarily storing data written in the write process without rewriting the protected data in the drift-off write area, if the data has been written in the drift-off write area.
Dependencies are inferred from the claim text.