| abstract |
A file system which is enabled to use a Metadata Partition instead of VAT for write-once discs, is provided by a pseudo-overwrite method. On applying this invention to a drive apparatus which supports pseudo-overwrite media, the file system distinguishes data to overwrite from data to append. When the data is newly written to a logical sector (S 1305 ), the drive apparatus writes the data to a physical sector to which the logical sector corresponds (S 1311 ). When the logical sector is overwritten the data is written to another unrecorded physical sector in the volume space ( 1321 ), and remapping information that specifies the original address, and the remapping address are stored in the remapping table (S 1322 ). |