Patent ID: 7792411

Claim:
A file processing device comprising: a processor; a memory device storing instructions which when executed by the processor, cause the processor to: (a) record, on a recording medium, a file which has a format in which a plurality of real data are allocated, said real data including a plurality of management information, said file being formed of: (i) a real data block in which the real data are integrated; and (ii) a management information block in which the management information of the real data including at least information necessary to reproduce the real data allocated to the real data block are integrated in a hierarchical structure, (b) record the real data block on the recording medium by: (a) intermittently reserving initial regions composed of free-space regions on the recording medium; and (b) recording, in the real data block, management information of the initial regions regarding allocation to the real data for managing each of the initial regions after the real data are recorded; and (c) record the management information block on the recording medium by recording a lower hierarchical block of management information corresponding to each of the real data and a lower hierarchical block composed of management information regarding the free-space regions in the initial regions which correspond to the above lower hierarchical block.