ADMINISTRATION DEVICE AND ADMINISTRATION METHOD

摘要

[Problem] To provide an administration method and an administration device enabling a computer system to be improved in terms of overall stability. [Solution] In a computer system in which a storage region provided to a plurality of storage devices is managed as a theoretical pool, a virtual volume associated with the theoretical pool is provided to a host computer, and a real storage region is allocated to the virtual volume from the theoretical pool during writing from the host computer to the virtual volume, the host computer is controlled when the plurality of storage devices are supplemented by another storage device so that an access pass is switched to the storage device.