Magnetic disk device configured to specify a range of previously written track that is to be overlapped during a write and verify data previously written in the specified range after the write
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorHitomi Ikeshima
Life of this patent
Estimating the term…
Abstract
A magnetic disk device includes a magnetic disk and a control circuit. The magnetic disk includes a first area where writing is performed in a manner such that a newly written track partially overlaps a previously written adjacent track. The control circuit is configured to specify a range of a second track, which is to be overlapped as a result of writing first data to a first track, write second data written in the specified range of the second track to a saving area prior to writing the first data to the first track, write the first data to the first track, and verify the second data in the second track after writing the first data to the first track.
Claims20
A magnetic disk device comprising:
- a magnetic disk including a first area where writing is performed in a manner such that a newly written track partially overlaps a previously written adjacent track;
- and
- a control circuit configured to specify a range of a second track, which is to be overlapped as a result of writing first data to a first track, write second data written in the specified range of the second track to a saving area prior to writing the first data to the first track, write the first data to the first track, and verify the second data in the second track after writing the first data to the first track.
A control method of a magnetic disk device, the method comprising:
- writing to a first area of a magnetic disk of the magnetic disk device in a manner such that a newly written track partially overlaps a previously written adjacent track, wherein writing first data to a first track that partially overlaps a second track includes:
- a first operation of specifying a range of the second track, which is to be overlapped as a result of writing the first data to the first track;
- a second operation of writing second data written in the specified range of the second track to a saving area;
- a third operation of writing the first data in the first track after the second operation;
- and
- a fourth operation of verifying the second data in the second track after the third operation.
Dependencies are inferred from the claim text.