As it is jointed to the library device of the subordinate as a virtual tape unit of positive center, a virtual tape unit, a virtual library

摘要

The hypothetical library system (100) the hypothetical tape unit (10), when entry demand for the data is accepted as backup processing, the data which is remembered in logical volume the library device which belongs to our device (30a and 30b) the migration processing which is housed is done to physical volume inside. Consequently, when the host (20) the hypothetical tape unit (10) notifies the export indication, the hypothetical tape unit (10), the data which is housed in the logical volume which migration processing completes through network, the secondary center side library device (30c) is exported in physical volume.