Rewritable optical disk with spare area and optical disk processing apparatus
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsHiroyuki Ohata, Kazuhiko Nakane
Life of this patent
Estimating the term…
Abstract
In order to enable recording and reproduction from optical disks with defect management formatted with different group configurations without changing the firmware of the conventional apparatus and to allow the size of the spare area to be specified at initialization, the position information indicating the position of the defect management area is recorded in the control data area provided in the read-only area of the optical disk, and the information indicating the first address or size of the spare area is included in the defect management area.
Claims12
A rewritable optical disk of which recording area is divided into a plurality of groups by annular boundaries;
- the number of sectors per track differing from one group to another,
- said optical disk having a spare area provided for each of said groups and having sectors which can be allocated in place of defective sectors of the disk, and a user area in which the user is allowed to record and reproduce information;
- said optical disk being configured so that
- the ratio of the number of sectors in the spare area to the number of sectors in the user area in at least one of a group containing a sector having the lowest logical address value and a group containing a sector having the largest logical address is higher than the corresponding ratios in other groups.
A rewritable optical disk of which recording area is divided into a plurality of groups by annular boundaries;
- the number of sectors per track differing from one group to another, said optical disk having a spare area provided for each of said groups and having sectors which can be allocated in place of defective sectors of the disk;
- wherein
- a read-only area contains a control data area that holds information for controlling recording/reproducing operation from said optical disk,
- a rewritable area contains a plurality of defect management areas that hold information for controlling replacement of defective sectors, and
- said control data area contains position information recorded to indicate the positions of said defect management areas.
A rewritable optical disk of which recording area is divided into a plurality of groups by annular boundaries;
- the number of sectors per track differing from one group to another, said optical disk having a spare area provided for each of said groups and having sectors which can be allocated in place of defective sectors of the disk;
- wherein
- a read-only area contains a control data area that holds information for controlling recording/reproducing operation from said optical disk, and
- a rewritable area contains a plurality of defect management areas that hold information for controlling replacement of defective sectors,
- wherein said defect management area contains information indicating the first address or size of said spare area.
An optical disk processing apparatus for handling a rewritable optical disk of which recording area is divided into a plurality of groups by annular boundaries;
- the number of sectors per track differing from one group to another, said optical disk having a spare area provided for each of said groups and having sectors which can be allocated in place of defective sectors of the disk;
- wherein
- a read-only area contains a control data area that holds information for controlling recording/reproducing operation from said optical disk,
- a rewritable area contains a plurality of defect management areas that hold information for controlling replacement of defective sectors,
- wherein said optical disk processing apparatus specifying the size of said spare area at initialization of said optical disk and recording the specified size or the first address of the spare area in said defect management area.
An optical disk drive apparatus operable to read and/or write data in user areas of an optical disk, and to use spare areas in place of user areas in case of defects in the user areas, the disk drive apparatus being operable to read from a disk information from which the position and size of spare areas can be determined.
A rewritable optical disk of which recording area is divided into a plurality of groups by annular boundaries;
- the number of sectors per track differing from one group to another,
- said optical disk having
- a read-only area containing a control data area that holds information for controlling recording/reproducing operation from said optical disk,
- wherein said control data area contains a parameter expressing a linear function of group number for obtaining the number of tracks in a given group or a linear function of group number for obtaining the number of sectors in a given group.
A rewritable optical disk of which recording area is divided into a plurality of groups by annular boundaries;
- the number of sectors per track differing from one group to another,
- said optical disk having
- a read-only area containing a control data area that holds information for controlling recording/reproducing operation from said optical disk,
- wherein
- said defect management area contains information for obtaining the number of sectors in the spare area of a given group.
Dependencies are inferred from the claim text.