Patent ID: 7260317

Claim:
A system control device for controlling a recording/reproducing section for recording AV data onto a disk and reproducing the recorded AV data in an AV data recording apparatus: wherein referring to a memory section provided in the AV data recording apparatus for storing file management information for dividing an extent that corresponds to continuous blocks on the disk into groups and managing the extent as a file and directory information for dividing the file into groups and managing the file as a directory, the system control device causes the recording/reproducing section to select at least two from the directory information and the file management information stored in the memory section so as to include at least one of the directory information and the file management information with overlapping permitted, and record them in a reservation region kept as a reservation extent on the disk, and when a subdirectory is created newly under the directory, the system control device causes the recording/reproducing section to record directory information on the subdirectory and file management information on a file to be created in a hierarchy of the subdirectory in the reservation region.