Virtual disk management program, storage device management program, multinode storage system, and virtual disk managing method

摘要

In a multinode storage system, a virtual disk associated with a storage device (5) to be connected is created, and a slice of a connected storage device (6) is allocated to one segment of the virtual disk. Next, one slice of data (5b) in the storage device (5) to be connected is copied to the connected storage device (6). The rest of data in the storage device (5) to be connected is divided into slices (5ca, 5cb, . . ), which are allocated to segments of the virtual disk. Then, metadata of the rest of the slices is written into a management information area in which copying of the data therefrom has been completed.