STORAGE SYSTEM, STORAGE SYSTEM CONTROL METHOD, AND RECORDING MEDIUM STORING VIRTUAL TAPE DEVICE CONTROL PROGRAM

A storage system according to an aspect of the present invention includes: a virtual tape device that includes circuitry configured to operate as a management unit that reads a data set from a virtual tape storage unit that stores the data set, the data set including, in an associated manner, a piece of virtual tape data including a piece of user data stored in a virtual tape and management data including a piece of location data indicating a storage location at which the piece of virtual tape data is stored, a conversion unit that generates a virtual tape file including the data set, and a transfer unit that transmits the virtual tape file as transfer data to an external storage device; and the external storage device that stores the transfer data upon receipt of the transfer data.