Patent ID: 7548501

Claim:
A disc for use with a recording and/or reproducing apparatus, the disc comprising: a user data area in which user data is recorded; a spare area other than the user data area and which comprises a substitute area for a defective area existing in the user data area; and a temporary defect management area which comprises temporary defect information and temporary defect management information recorded for a recording operation for use by the recording and/or reproducing apparatus to perform disc defect management, wherein the temporary defect information comprises a defect position pointer that points to a position of a defective area in the user data area and a replacement position pointer that points to a position of the replacement data that replaces a portion of the user data recorded in the defective area, wherein: the temporary defect information further comprises state information that specifies whether the defective area is a single defective block or a continuous defective block extending over more than one block, when the state information specifies that the defective area is the continuous defective block, the state information further specifies whether the defective area is a start or end of the continuous defective block, when the state information specifies that the defective area is the start of the continuous defective block, the defect position pointer indicates a start position of the continuous defective block and the replacement position pointer indicates a start position of a continuous replacement block for replacing the continuous defective block, and when the state information specifies that the defective area is the end of the continuous defective block, the defect position pointer indicates an end position of the continuous defective block and the replacement position pointer indicates an end position of a continuous replacement block for replacing the continuous defective block.