Patent ID: 7633838

Claim:
An optical disk recorder comprising: a data writing means for writing data into an optical disk; a data reading means for reading out data from an optical disk; a data erasure instruction means, which is operated by a user, to instruct to perform erasure of data of an optical disc to the data writing means; and a data erasure instruction cancel means, which is operated by the user, to instruct to cancel the data erasure instruction to the data writing means, wherein when the data erasure instruction means instructs to perform erasure of data of an optical disc, the data reading means reads out file management data from the file management data area of the optical disc before erasing of the file management data, the data writing means writes the file management data into a specific area except the file management data area so as to save the file management data, and subsequently the data writing means write predetermined data for erasing the file management data originally written in the file management data area; and when the data erasure instruction cancel means instructs to cancel the erasure of the data, the data reading means reads out the file management data saved in the specific area of the optical disc, and the data writing means writes the file management data read out from the specific area into the file management data area where the file management data were originally written.