| 摘要 |
<P>PROBLEM TO BE SOLVED: To protect actual data of a file to restore the file, when a system or a program is abnormally terminated due to a sudden power shut-off or the like. <P>SOLUTION: When data of an update object file 310 is changed, (1) a file operation means creates a backup file 320 of the update object file 310; (2) a hash value calculation means calculates a hash value of the update object file and records it in a storage medium as a hash value record file 330; (3) the file operation means changes the data of the update object file; and (4) the file operation means deletes the hash value record file 330 and the backup file 320. <P>COPYRIGHT: (C)2012,JPO&INPIT |
