RECORDING APPARATUS, MEDIUM, METHOD, AND RELATED COMPUTER PROGRAM

摘要

A recording apparatus for an SD memory card that has a plurality of EPUBxxx.KEY files recorded thereon, each file having a plurality of Key & Rule Entry areas, and an SD EPUB.MMG file being read from the recording medium prior to the writing of data. A bitmap in SD EPUB.MMG shows for each EPUBxxx.KEY file whether the EPUBxxx. KEY file has at least one Key & Rule Entry area not in use, or whether all the Key & Rule Entry areas are in use. Based on the bitmap in the read SD EPUB.MMG file, the recording apparatus opens EPUB#u.KEY having an unused Key & Rule Entry area and writes data into the unused Key & Rule Entry area in the file. If all the Key & Rule Entry areas in EPUB#u.KEY become in use as a result of the writing of the data, the recording apparatus updates the bitmap in SD EPUB.MMG.