STORAGE DEVICE AND METHOD OF CONTROLLING STORAGE DEVICE

摘要

It is an object of the present invention to suppress inconsistency of mount information necessary for mounting a volume in a storage device having a primary volume and a secondary volume. The storage device according to the present invention creates a memory region storing the mount information necessary for mounting the secondary volume, saves a snapshot thereof, and presents a virtual volume which has been created by using the snapshot and the data in the secondary volume to an external device (See Fig. 6C).