Patent ID: 8140793
Filing Date: 2012-03-20
Classification: G06F,Y02D

Abstract:
1. A virtual tape device combined with a higher-order device that manages data with a tape device to manage the data, which is managed by the higher-order device with the tape device, with a disk base that uses two or more disk devices, the two or more disk devices being divided into an information managing disk group whose power is kept on at all times and to two or more recording disk groups whose power is turned on/off as necessary when managing the data, the virtual tape device comprising: a volume information managing part which manages positions of virtual tapes allotted to storage areas of the recording disk groups; and a data managing part which rearranges, in the recording disk group whose power is on among the recording disk groups, the virtual tape for storing the data to the recording disk group whose power is off based on writing or reading information stored in the information managing disk group and positional information of the virtual tapes managed by the volume information managing part, and executes a control to write the data to the recording disk group whose power is on.