| 摘要 |
PROBLEM TO BE SOLVED: To provide a recording medium having a spare area for defect management and information on defect management, a method for allocating the spare area, and a method for managing a defect. SOLUTION: When a primary spare area to be allocated for slipping replacement and linear replacement upon initialization, and a spare area after initialization are insufficient, a supplementary spare area is allocated. The sizes of the primary and supplementary spare areas are determined by the number of defects generated upon initialization. Information on the sizes of the spare areas and remainder state information representing the degree of use of the spare areas, are recorded, so that the spare areas can efficiently be managed. In the defect management method, when an area which has already been linearly replaced is allocated as a supplementary spare area, defective blocks within the allocated supplementary spare area are not used for linear replacement, and the entries of an SDL(secondary defect list) items to the defective blocks are not changed.
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