Disk device and media scanning method
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsMakoto Segawa, Fuyuki Tawada, Osamu Yoshida
Life of this patent
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Abstract
According to one embodiment, a disk device includes a disk, a head that performs data read/write processing on a recording region of the disk, a controller that performs a media scan processing for detecting the presence or absence of a defect in a sector in the recording region of the disk in track unit. When the controller performs the media scan processing on a first sector and a second sector arranged in the track, and a third sector arranged between the first sector and the second sector, the controller performs skip processing in which the controller scans the first sector and the second sector, and does not scan the third sector.
Claims6
A disk device, comprising:
- a disk;
- a head that performs data read/write processing on a recording region of the disk;
- and
- a controller that controls the media scan processing for detecting a presence or absence of a defect in a sector in the recording region of the disk in track unit,
- wherein when the controller performs media scan processing on a first sector and a second sector arranged in the track, and a third sector arranged between the first sector and the second sector, the controller performs skip processing in which the controller scans the first sector and the second sector, and does not scan the third sector, and
- the controller optionally changes, for each media scan processing, at least one of the number and a location of the third sector to be skipped in the media skip processing, and performs selection so that physical positions of sectors to be skipped between adjacent tracks do not overlap at the time of the change.
A disk device, comprising:
- a disk;
- a head that performs data read/write processing on a recording region of the disk;
- and
- a controller that controls the media scan processing for detecting a presence or absence of a defect in a sector in the recording region of the disk in track unit,
- a first memory that records a location of an error sector in which an error was detected when the error sector is detected during the media scan processing by the controller;
- wherein
- the controller refers to the first memory at a time of media scan processing, and when the location of the error sector is included in a scan range, the controller suspends skipping and performs scan processing on each of the error sector on which the skip processing has been performed, sectors arranged before and after the error sector in a first track including the error sector, and a sector which is arranged alongside the error sector in a second track adjacent to the first track.
A disk device, comprising:
- a disk;
- a head that performs data read/write processing on a recording region of the disk;
- and
- a controller that controls the media scan processing for detecting a presence or absence of a defect in a sector in the recording region of the disk in track unit,
- a second memory that records a location of a retry sector where re-tries have been performed a predetermined number of times or more;
- wherein
- the controller refers to the second memory at a time of media scan processing, and when the location of the retry sector is included in a scan range, the controller suspends skipping and performs media scan processing on each of the retry sector on which the skip processing has been performed, sectors arranged before and after the retry sector in a first track including the retry sector, and a sector which is arranged alongside the retry sector in a second track adjacent to the first track.
Dependencies are inferred from the claim text.