Computer system, management computer, and volume allocation change method of management computer

摘要

Disclosed is to prevent an intervention and falsification by setting encrypted transfer between a host computer and a storage device that provides a virtual volume and between the storage device that provides the virtual volume and a storage device that provides a real volume corresponding to the virtual volume. A management computer 1 specifies storage devices 3 b and 3 c that provide a real volume corresponding to a virtual volume by providing a volume corresponding to the virtual volume used by a host computer 3 in which encrypted transfer becomes necessary, sets the encrypted transfer to communication between a storage device 3 a that provides the virtual volume and the specified storage devices 3 b and 3 c that provide the real volume corresponding to the virtual volume, makes a reconnection thereof, and also sets the encrypted transfer to an I/O port used for the communication with the host computer 2 in the storage device 3 a that provides the virtual volume.