Patent ID: 8112609
Filing Date: 2012-02-07
Classification: G06F

Abstract:
1. A data management apparatus comprising: an input unit to receive a request to update information included in a predetermined master BAT (block allocation table) block of a plurality of master BAT blocks; and an update unit to record updated information to the predetermined master BAT block based on the update request; wherein the plurality of master BAT blocks comprises a plurality of first master BAT blocks stored in a first storage region and a plurality of second master BAT blocks stored in a second storage region, wherein a disk is physically divided into the first storage region and the second storage region; wherein the update unit alternately records the updated information in one of the plurality of the first master BAT blocks of the first storage region and one of the plurality of second master BAT blocks of the second storage region; wherein when information stored in a predetermined slave BAT included in the first master BAT block of the first storage region is updated, the second master BAT block stores the updated information corresponding to the information stored in the first master BAT block; and wherein when information stored in a predetermined slave BAT included in the second master BAT block of the second storage region is updated, the first master BAT block stores the updated information corresponding to the information stored in the second master BAT block.