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US 6,189,118 B1Granted
Information recording medium, and method and apparatus for managing defect thereof
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShinji Sasaki, Motoshi Ito, Hiroshi Ueda, Yoshihisa Fukushima
Life of this patent
Estimating the term…
Abstract
An information recording medium includes a disk information area; a user area including a plurality of sectors; and a spare area including at least one sector which, when at least one of the plurality of sectors included in the user area is a defective sector, is usable instead of the at least one defective sector. The spare area is located radially inward from the user area. A physical sector number of a sector to which a logical sector number “0” is assigned, among the plurality of sectors included in the user area and the at least one sector included in the spare area, is recorded in the disk information area.
Claims16
An information recording medium, comprising:
- a disk information area;
- a user area including a plurality of sectors;
- and
- a spare area including at least one sector which is usable when at least one of the plurality of sectors included in the user area is a defective sector,
- wherein:
- the spare area is located immediately radially inward from the user area,
- a physical sector number of a sector to which a logical sector number “0” is assigned, among the plurality of sectors included in the user area and the spare area, is recorded in the disk information area, and
- logical sector numbers are respectively assigned to the sectors other than the defective sector included in the user area in a decreasing order from the sector to which a last logical sector number is assigned.
5 more elements
An information recording medium, comprising:
- a disk information area;
- a user area including a plurality of sectors;
- and
- a spare area including at least one sector which is usable when at least one of the plurality of sectors included in the user area is a defective sector,
- wherein:
- physical sector numbers of the sectors included in the spare area are smaller than those of the sectors included in the user area, and the smallest physical sector number of the user area is equal to a number obtained by adding 1 to the largest physical sector number of the spare area,
- a physical sector number of a sector to which a logical sector number “0” is assigned, among the plurality of sectors included in the user area and the spare area, is recorded in the disk information area, and
- logical sector numbers are respectively assigned to the sectors other than the defective sector included in the user area in a decreasing order from the sector having a larger physical sector number to the sector having a smaller physical sector number.
5 more elements
An information recording medium, comprising:
- a disk information area;
- a user area including a plurality of sectors;
- and
- a spare area including at least one sector which is usable when at least one of the plurality of sectors included in the user area is a defective sector,
- wherein:
- the spare area is located immediately radially inward from the user area,
- a physical sector number of a sector to which a logical sector number “0” is assigned, among the plurality of sectors included in the user area and the spare area, is recorded in the disk information area,
- logical sector numbers are respectively assigned to at least two sectors of the plurality of sectors included in the user area in a decreasing order from the sector to which a last logical sector number is assigned, and
- any logical sector number is not assigned to the defective sector included in the user area.
6 more elements
An information recording medium, comprising:
- a disk information area;
- a user area including a plurality of sectors;
- and
- a spare area including at least one sector which is usable when at least one of the plurality of sectors included in the user area is a defective sector,
- wherein:
- physical sector numbers of the sectors included in the spare area are smaller than those of the sectors included in the user area, and the smallest physical sector number of the user area is equal to a number obtained by adding 1 to the largest physical sector number of the spare area,
- a physical sector number of a sector to which a logical sector number “0” is assigned, among the plurality of sectors included in the user area and the spare area, is recorded in the disk information area,
- logical sector numbers are respectively assigned to at least two sectors of the plurality of sectors included in the user area in a decreasing order from the sector having a larger physical sector number to the sector having a smaller physical sector number, and
- any logical sector number is not assigned to the defective sector included in the user area.
6 more elements
A method for managing a defect of an information recording medium including a disk information area;
- a user area including a plurality of sectors;
- and a spare area including at least one sector which is usable when at least one of the plurality of sectors included in the user area is a defective sector, the spare area being located immediately radially inward from the user area, the method comprising the steps of:
- (a) assigning a last logical sector number to one of the plurality of sectors included in the user area;
- (b) calculating a location fulfilling a prescribed capacity, with reference to a location of the sector to which the last logical sector number is assigned;
- (c) assigning a logical sector number “0” to a sector positioned at the location calculated by the step (b);
- and
- (d) recording a physical sector number of the sector to which the logical sector number “0” is assigned in the disk information area.
4 more elements
A method for managing a defect of an information recording medium including a disk information area;
- a user area including a plurality of sectors;
- and a spare area including at least one sector which is usable when at least one of the plurality of sectors included in the user area is a defective sector, physical sector numbers of the sectors included in the spare area being smaller than those of the sectors included in the user area, and the smallest physical sector number of the user area is equal to a number obtained by adding 1 to the largest physical sector number of the spare area, the method comprising the steps of:
- (a) assigning a last logical sector number to one of the plurality of sectors included in the user area;
- (b) calculating a location fulfilling a prescribed capacity in a direction from the sector having a larger physical sector number to the sector having a smaller physical sector number, with reference to a location of the sector to which the last logical sector number is assigned;
- (c) assigning a logical sector number “0” to a sector positioned at the location calculated by the step (b);
- and
- (d) recording a physical sector number of the sector to which the logical sector number “0” is assigned in the disk information area.
4 more elements
An apparatus for managing a defect of an information recording medium including a disk information area;
- a user area including a plurality of sectors;
- and a spare area including at least one sector which is usable when at least one of the plurality of sectors included in the user area is a defective sector, the spare area being located immediately radially inward from the user area,
- wherein:
- the apparatus performs a defect managing processing, the defect managing processing includes the steps of:
- (a) assigning a last logical sector number to one of the plurality of sectors included in the user area;
- (b) calculating a location fulfilling a prescribed capacity, with reference to a location of the sector to which the last logical sector number is assigned;
- (c) assigning a logical sector number “O” to a sector positioned at the location calculated by the step (b);
- and
- (d) recording a physical sector number of the sector to which the logical sector number “0” is assigned in the disk information area.
6 more elements
An apparatus for managing a defect of an information recording medium including a disk information area;
- a user area including a plurality of sectors;
- and a spare area including at least one sector which is usable when at least one of the plurality of sectors included in the user area is a defective sector, physical sector numbers of the sectors included in the spare area being smaller than those of the sectors included in the user area, and the smallest physical sector number of the user area is equal to a number obtained by adding 1 to the largest physical sector number of the spare area,
- wherein:
- the apparatus performs a defect managing processing, the defect managing processing includes the steps of:
- (a) assigning a last logical sector number to one of the plurality of sectors included in the user area;
- (b) calculating a location fulfilling a prescribed capacity in a direction from the sector having a larger physical sector number to the sector having a smaller physical sector number, with reference to a location of the sector to which the last logical sector number is assigned;
- (c) assigning a logical sector number “0” to a sector positioned at the location calculated by the step (b);
- and
- (d) recording a physical sector number of the sector to which the logical sector number “0” is assigned in the disk information area.
6 more elements
Dependencies are inferred from the claim text.