VIRTUAL TAPE DEVICE AND VIRTUAL TAPE DEVICE CONTROL METHOD

摘要

A virtual tape device includes a determination unit and a copy creation unit. The determination unit determines, when deleting some logical volume data among a plurality of logical volume data stored on a first physical tape, whether to conduct copy processing to store a copy of the logical volume data onto a second physical tape on the basis of a storage location of the logical volume data. The copy creation unit stores, when it is determined to conduct the copy processing, a copy of the logical volume data on the second physical tape so as to cause spacing between a storage location of the logical volume data on the second physical tape and a head location on the second physical tape to become shorter than spacing between a storage location of the logical volume data on the first physical tape and a head location on the first physical tape.

主权项

1. A virtual tape device comprising:
a determination unit that determines, when deleting some logical volume data among a plurality of logical volume data stored on a first physical tape, whether to conduct copy processing to store a copy of the logical volume data to be deleted onto a second physical tape on the basis of a storage location of the logical volume data to be deleted on the first physical tape; and a copy creation unit that stores, when the determination unit has determined to conduct the copy processing, a copy of the logical volume data on the second physical tape so as to cause spacing between a storage location of the logical volume data on the second physical tape and a head location on the second physical tape to become shorter than spacing between a storage location of the logical volume data on the first physical tape and a head location on the first physical tape.