Patent ID: 7634625

Claim:
A system comprising: a storage device including volumes for recording data, and a network connection portion; a first computer for reading/writing data from/into the volumes through a network; a network for connecting the storage device and the first computer to each other; and a second computer connected to the network, wherein the first computer inspects the content of access to the storage device to detect illegal data, collects an inspection log as a result of detection of data indicating abnormality under the inspection and sends the inspection log to the second computer at predetermined timing, wherein, when the second computer receives no inspection log, the second computer sends a copy command to the storage device through the network to copy data from one volume of the storage device to another volume of the storage device, and the storage device copies data from the volume to the other volume on the basis of the command given by the second computer, wherein, when the second computer receives the inspection log, the second computer sends another copy command to the storage device through the network to restore data to another volume of the storage device by referring to a back-up volume list, and the storage device restores data from the volume to another volume on the basis of the back-up volume list, and wherein, when the second computer receives the inspection log, the storage device restores data latest in back-up time from the volume to said another volume by referring to the back-up volume list.