FIELD: information technology.
SUBSTANCE: management region contains intermediate information on defects and intermediate information on defect management. The intermediate information on defects contains information on location of the defect region in the data region and information on location of a replacement region for the defect region, and intermediate information on defect management includes information on location of intermediate information on defects. The management region further contains a defect management region. The latest intermediate information on defects and the latest intermediate information on defect management, which are recorded last in the intermediate defect management region, are recorded as defect information and defect management information in the defect management region.
EFFECT: shorter time for accessing a disc.
3 cl, 9 dwg
