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US 12,562,192 B2Granted
Magnetic disk device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorTakayuki Kawabe
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a magnetic disk device includes a disk, a write head, a write processing unit, an error correction unit, a correction limit prediction unit, and a determination unit. During a write period in which the write processing is executed on the second data track, the correction limit prediction unit is capable of determining whether or not data of each of the target sectors of the first data track is damaged, and generates prediction information, and the determination unit determines whether or not to cause the write processing unit to continue the write processing on the second data track based on the prediction information.
Claims18
A magnetic disk device comprising:
- a disk that has a first data track and a second data track adjacent to each other in a recording layer, the first data track and the second data track each including a plurality of target sectors to which data is to be written;
- a write head that writes data to the recording layer of the disk;
- a write processing unit that is capable of executing write processing of writing data to the recording layer;
- an error correction unit that executes error correction on data in track units and executes error correction on data of a damaged target sector in which data is determined to be damaged among the plurality of target sectors on the first data track;
- a correction limit prediction unit;
- and
- a determination unit,
- during a write period in which the write processing is executed on the plurality of target sectors of the second data track after the write processing is executed on the plurality of target sectors of the first data track,
- the correction limit prediction unit
- being capable of determining whether or not data of each of the plurality of target sectors of the first data track is damaged, and
- generating prediction information that is information for predicting whether or not the error correction performed on the first data track reaches a limit until the write processing on all the target sectors of the second data track is completed,
- the determination unit determining whether or not to cause the write processing unit to continue the write processing on the second data track based on the prediction information.
9 more elements
A magnetic disk device comprising:
- a disk that has a first data track and a second data track adjacent to each other in a recording layer, the first data track and the second data track each including a plurality of target sectors to which data is to be written;
- a write head that writes data to the recording layer of the disk;
- a write processing unit that is capable of executing write processing of writing data to the recording layer;
- an error correction unit that executes error correction on data of a damaged target sector in which data is determined to be damaged among the plurality of target sectors on the first data track;
- a switching unit that is capable of setting a valid mode that enables an error correction mode performed in track units by the error correction unit;
- a correction limit prediction unit;
- and
- a determination unit,
- during a write period in which the write processing is executed on the plurality of target sectors of the second data track after the write processing is executed on the plurality of target sectors of the first data track,
- the correction limit prediction unit
- being capable of determining whether or not data of each of the plurality of target sectors of the first data track is damaged, and
- generating prediction information that is information for predicting whether or not the error correction performed on the first data track reaches a limit until the write processing on all the target sectors of the second data track is completed,
- the determination unit determining whether or not to cause the write processing unit to continue the write processing on the second data track based on the prediction information,
- during the write period, in a case where the prediction information is normality information for predicting that the error correction does not reach the limit,
- the switching unit that sets the error correction mode to the valid mode, and
- the determination unit that causes the write processing unit to continue the write processing on the second data track.
13 more elements
Dependencies are inferred from the claim text.