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.
Claims8
A rewritable optical disk of which recording area is divided into a plurality of groups arranged from an inner group to an outer group and having annular boundaries;
- the number of sectors per track differing from one group to another, said optical disk having a spare area associated with each of said groups and having sectors which can be allocated in place of defective sectors of the disk;
- wherein
- a control data area holding information for controlling recording/reproducing operation from said optical disk,
- a plurality of defect management areas holding information for controlling replacement of defective sectors, and
- said control data area contains position information recorded to indicate the positions of at least one of said defect management areas,
- said spare area having a size that may be varied as needed;
- the total space occupied by said recording area and spare area being substantially constant so that reducing the size of said spare area increases the size of said recording area, and
- the ratio of the spare area to recording area being greater in one of said inner and said outer group than in other of said plurality of groups.
A rewritable optical disk comprising:
- a single spiral land/groove disk having offset header information;
- said disk having a storage portion including,
- a control data area,
- a recording area divided into a plurality of annular zones arranged from an inner zone to an outer zone, each annular zone having a differing number of sectors per track and including a user area in which the user may record and reproduce information, and
- a spare area provided on said disk and having sectors that can be allocated in place of defective sectors of the disk;
- said control data area including a spare area size field related to the selected size of said spare area,
- said spare area having a size that may be varied as needed;
- the total space occupied by said recording area and spare area being substantially constant so that reducing the size of said spare area increases the size of said recording area, and
- the ratio of the spare area to recording area being greater in one of said inner and said outer zone than in other of said plurality of zones.
A rewritable optical disk of which recording area is divided into a plurality of groups arranged from an inner group to an outer group and having annular boundaries;
- the number of sectors per track differing from one group to another,
- said optical disk having
- a spare area associated with each of said plurality of groups;
- a defect management area;
- and
- 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,
- said spare area having a size that may be varied as needed;
- the total space occupied by said recording area and spare area being substantially constant so that reducing the size of said spare area increases the size of said recording area, and
- the ratio of the spare area to recording area being greater in one of said inner and said outer group than in other of said plurality of groups.
Dependencies are inferred from the claim text.