Patent ID: 7848192

Claim:
A data recording apparatus for performing additional recording on a disc including a plurality of logical sectors in compliance with a predetermined file system format, in the predetermined file system format, reference information to file system data is determined to be recorded at least in two places out of three places of a first logical sector of a disc-inner circumference, a second and a third logical sectors of an inner circumference from a last-recorded logical sector, the data recording apparatus comprising: disc-initialization means for recording standard information at a predetermined logical sector position from an innermost circumference of the disc, reserving an area from immediately after the recording of the standard information to immediately before a fourth logical sector being a file-data recording start position including the first logical sector, and performing initialization of the disc; and additional recording means for recording file data and file system data continuously from the fourth logical sector being immediately after the reserved area or a logical sector immediately after recorded area, and recording reference information to the file system data in two places, the second and the third logical sectors of an inner circumference from the last-recorded logical sector.