Data archive system

A data archive system for recording data, comprising:

• a data library apparatus configured to record the data;
• and
• a server configured to control the data library apparatus, wherein
• the data library apparatus includes a plurality of recording media having recording surfaces on both a surface and a rear surface, a recording media storage unit in which the recording media is stored, a recording/reproducing unit for the surface for recording/reproducing the data on/from the surface of the recording media, a recording/reproducing unit for the rear surface for recording/reproducing the data on/from the rear surface of the recording media, and a recording media transporting unit for transporting the recording media between the recording media storage unit and the recording/reproducing units,
• the server includes a data configuration unit for allocating the data for recording on the surface and the rear surface of the recording media of the data library apparatus and a controller for controlling the data library apparatus, and
• the data configuration unit of the server alternately allocates the recording data on either the surface or the rear surface of the recording media, the recording media being different from each other in the data library apparatus.