LIBRARY DEVICE, METHOD FOR CONTROLLING LIBRARY DEVICE, AND RECORDING MEDIUM FOR LIBRARY DEVICE CONTROL PROGRAM

摘要

A library device having a plurality of processing units that control data access to one or more drive units includes a processor and a memory coupled to the processor. The processor executes collecting state information of each drive unit processed in each of the processing units, predicting a number of drive units in use a certain amount of time later, based on the state information of each drive unit in the processing units, predicting a number of the processing units in demand a certain amount of time later, based on restricting information that indicates the number of the drive units to be controlled by the processing unit and the number of the drive units that has been predicted, and controlling supply of electric power to the processing units, based on the number of the processing units in demand predicted by the predicting of the number of the processing units.