Storage area managing apparatus and storage area managing method

A storage area managing apparatus for managing a plurality of storage drive groups each of which has a plurality of storage drives providing redundancy for each other, the storage area managing apparatus comprising:

• a managing unit for managing a plurality of logical volumes provided by the plurality of storage drive groups for storing the data redundantly;
• a rebuilding controller for generating recovery data, when at least one of the storage drive groups is degraded on the basis of the data stored in the degraded storage drive group, and generating a selected logical volume on the basis of the capacity of the recovery data, the rebuilding controller controlling the management unit for managing first logical volumes to correspond to a part of the plurality of storage drive groups except for the degraded storage drive group;
• and
• a first transferring unit for transferring the recovery data to the part of the plurality of storage drive groups as indicated by the selected logical volume.