Magnetic disk drive refreshing data written to disk and data refreshment method applied to magnetic disk drive
AssigneeKabushiki Kaisha Toshiba
InventorsTakao Aoki, Yasuhiko Ichikawa
Life of this patent
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Abstract
According to one embodiment, a disk has a set of tracks thereon. A controller performs refresh control for reading data by a head from a track on the disk to be refreshed and for writing the read data by the head to a spare track adjacent to the track from which the data has been read. The controller switches the track from which the data has been read to a new spare track after the writing.
Claims3
A magnetic disk drive performing a data refresh comprising:
- a disk with data tracks thereon;
- and
- a controller configured to perform a refresh of data written to the disk, using at least one of the data tracks as a spare data track, the refresh of data written to the disk comprising repeatedly moving data from a data track adjacent to the spare data track to the spare data track and switching the adjacent data track to become a next spare data track in accordance with moving data from the data track adjacent to the spare data track to the spare data track.
A method for controlling a refresh of data written to a disk with data tracks thereon, the method comprising:
- performing a refresh of data written to the disk, using at least one of the data tracks as a spare data track, the refresh of data written to the disk comprising repeatedly moving data from a data track adjacent to the spare data track to the spare data track;
- and
- switching the adjacent data track to become a next spare data track in accordance with moving data from the data track adjacent to the spare data track to the spare data track.
A controller configured to control a refresh of data written to a disk with data tracks thereon, the controller comprising;
- a control module configured to perform a refresh of data written to the disk, using at least one of the data tracks as a spare data track, the refresh of data written to the disk comprising repeatedly moving data from a data track adjacent to the spare data track to the spare data track and switching the adjacent data track to become a next spare data track in accordance with moving data from the data track adjacent to the spare data track to the spare data track.
Dependencies are inferred from the claim text.