Patent ID: 7400563

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 defect is a continuous defect block extending over more than one block or a single defect block.