Patent ID: 8085635
Filing Date: 2011-12-27
Classification: G11B

Abstract:
1. A write-once optical disc onto which data is recorded in units of clusters, the write-once optical disc including a user data area and a temporary defect management area, wherein a defective area list and structure information are recorded in the temporary defect management area, plural clusters constituting the temporary defect management area include a defective cluster, the temporary defect management area has a portion in which parts of the defective area list are arranged in an order of: a first part of the defective area list that has been written successfully by an initial writing; a second part of the defective area list that has been written in the defective cluster in the temporary defect management area by the initial writing and then has been written successfully by a retry; and a third part of the defective area list whose last cluster includes the structure information, each part of the defective area list indicates at least one defective cluster in the user data area correlated with a substitute area in the write-once optical disc, and the structure information includes plural pieces of position information that indicate positions of clusters each of which constitutes a part of the defective area list.