Patent ID: 9082431
Filing Date: 2015-07-14
Classification: G11B

Abstract:
1. A data archive system with a server and a data library device, wherein; the server comprising: a control unit that controls the data archive system; a data library I/F unit for communicating with the data library device; and an information storing medium for storing disc-related information associated with each optical disc that is stored in the data library device; the data library device comprising: a plurality of the optical discs; an optical disc storing unit where the optical disc is stored; a plurality of recording/reproducing units that record/reproduce data to/from the optical disc; and a library control unit that controls the recording/reproducing units and communicates with the server through the data library I/F unit, wherein the control unit controls the data archive system to execute first quality inspection of a first optical disc, execute second quality inspection of a second optical disc which is different from the first optical disc when a quality of the first optical disc is judged deteriorated, refer to disc-related information of the first optical disc and disc-related information of the second optical disc recorded on the information storing medium when it is judged that a quality of the second optical disc is deteriorated in the second quality inspection, and estimate a factor that causes the qualities of the first and the second optical discs to deteriorate based on the referred disc-related information, and wherein the factor of the quality deterioration is estimated from disc-related information that is common to portions of the disc-related information of only a plurality of deteriorated optical discs.