Magnetic disk device and method of continued reading of sectors of magnetic disk device even after an error is detected in one of the sectors
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorYosuke Kondo
Life of this patent
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Abstract
A magnetic disk device includes a magnetic disk, which includes, in a track, a plurality of first sectors each recording user data and a second sector recording parity data for restoring the user data recorded in the first sectors, and a disk controller configured to read data from a plurality of sectors including the first sectors and the second sector based on an instruction from a host, and to detect whether there is an error in each of the first sectors when the user data is read from the first sectors. The disk controller continues reading the data recorded in the plurality of sectors even when an error is detected in one of the first sectors by the disk controller.
Claims14
A magnetic disk device, comprising:
- a magnetic disk which includes, in a track, a plurality of first sectors each recording user data and a second sector recording parity data for restoring the user data recorded in the first sectors;
- and
- a disk controller configured to read data from a plurality of sectors including the first sectors and the second sector based on an instruction from a host, and for each of the first sectors, to detect whether there is an error when the user data is read therefrom and error correction processing is performed on the user data read therefrom,
- wherein
- the error that the disk controller is configured to detect is one of a first error indicating that error correction processing performed on the user data is not successful and a second error indicating that the sector from which the user data is read is an error sector, and
- the disk controller continues reading the data recorded in the plurality of sectors even when the error is detected in one of the first sectors by the disk controller.
A method for reading data in a magnetic disk device including a magnetic disk which includes, in a track, a plurality of first sectors each recording user data and a second sector recording parity data for restoring the user data recorded in the first sectors, the method comprising:
- reading data from a plurality of sectors including the first sectors and the second sector based on an instruction from a host;
- and
- for each of the first sectors, detecting whether there is an error when the user data is read therefrom and error correction processing is performed on the user data read therefrom,
- wherein
- the error that is detected is one of a first error indicating that error correction processing performed on the user data is not successful and a second error indicating that the first sector from which the user data is read is an error sector, and
- the reading of the data in the plurality of sectors is continued even when an error is detected in one of the first sectors.
Dependencies are inferred from the claim text.