Patent ID: 7961567

Claim:
An optical disk apparatus which records and reproduces information in and from a recordable disk, the optical disk apparatus comprising: a management information obtaining unit which obtains disk management information from a disk loaded in the optical disk apparatus, the disk management information being used to manage information already recorded in the disk; a management information retaining unit which retains an information group that is stored previous to the disk being loaded in the optical apparatus, the information group corresponding to the disk management information; an error detection unit which compares the disk management information obtained by the management information obtaining unit with the information group retained by the management information retaining unit to detect an error in the disk management information obtained from the disk; an error correction unit which corrects the error of the disk management information detected by the error detection unit into regular information; and a recording and reproducing control unit which performs a recording operation and a reproducing operation to the disk based on the disk management information corrected by the error correction unit, wherein the recording and reproducing control unit generates disk management information which is updated based on the disk management information corrected by the error correction unit, and the recording and reproducing control unit records the generated disk management information in the disk.