DATEIVERWALTUNGSVERFAHREN

摘要

When the management area and the actual data area are separated beforehand in a filesystem and the management area is replicated to perform backup, the maximum number of files to be managed will be limited by the size of the management area because it is necessary to reserve the management area and the backup management area beforehand. In a filesystem in which the management area and the data area are recorded into a common area, it is impossible to use a replicating technique of the entire management area since there is no concept of the management area. The problem is solved by creating in succession history information of a file each time an action such as addition, revision or deletion of the file on the recording medium is effected, each history information including recorded positional information of the file on the recording medium and the type of the action on the file, related with the file identification information of the file; and recording the history information in a history table area, which is separated from the area where the files and management information are recorded, in the order in which the history information have been created.