900 denotes back end connection means and the other reference symbols are identical to those in fig1 in the embodiment of the present invention shown in fig2 the controller 310 is provided as a separate device from the storage device 300 and connected to the network 700 the controller 310 and the storage device 300 are connected to each other by the back end connection 900 in this configuration also it is possible to perform the processes same as those in the aforementioned first embodiment the connection means 900 may be for example fc ip infini band and the like the management terminal 800 references the aforementioned various information items held by the server 100 via the network 700 or the san 600 and can display them for a user moreover according to a request from the user the management terminal can set various information items via the network 700 or the san 600 such as formation setting deletion of a virtualized volume making correspondence between the virtualized volume and the physical volume 400 formation setting deletion of a virtualized volume pair and the like as has been described above according to the present invention in an information processing system which virtualizes a storage region it is possible to perform management and control of processing in a storage system according to a virtualized storage region especially in the storage device system it is possible to perform snapshot formation management and control according to a virtualized storage region independently moreover according to the present invention instructions of processing management and control in the storage device system can be performed according to a virtualized storage region it should be further understood by those skilled in the art that the foregoing description has been made on embodiments of the invention and that.