Data updating apparatus that performs quick restoration processing
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United States of America Patent
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-
Jan 6, 2004
Grant Date -
Dec 13, 2001
app pub date -
Jun 4, 2001
filing date -
Jun 6, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A data updating apparatus updates a plurality of pieces of data that constitutes a file in a storage medium. The storage medium stores (a) first and second FATs which indicate data storage locations and data sequences and (b) file indexes which each correspond to a file and associate a file name with a storage location of a top piece of data of a file. In the data updating apparatus, an updating unit updates the first FAT, the corresponding file index, and the second FAT in the stated order in updating of the file; a temporary index generating unit generates a temporary index including a storage location of the corresponding file index and new contents of the corresponding file index, and writes it into the storage medium before the first FAT updating; and a temporary index deleting unit deletes the temporary index from the storage medium after the second FAT updating.
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