Patent ID: 7372793

Claim:
A write-once disc for use with a recording and/or reproducing apparatus, the write-once 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; 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; and a defect management area other than the temporary defect management area which is management information, wherein: the temporary defect management information comprises information on a recording position of the temporary defect information, and 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.