Patent ID: 8521987

Claim:
A storage control device comprising: a controller, managing a plurality of first storage areas provided with a plurality of storage devices, and dividing each of the plurality of first storage areas into a plurality of second storage areas, each of the plurality of first storage areas having a first fixed area size, each of the second plurality of storage areas having a second fixed area size being smaller than the first fixed area size, and wherein the controller is adapted to: provide a plurality of virtual volumes of a predetermined size to a computer, allocate a particular first storage area exclusively to a first virtual volume of the plurality of virtual volumes, when a first write command from the computer to the first virtual volume is received, write data of the first write command to a second storage area of the plurality of second storage areas in the allocated particular first storage area, and receive a second write command from the computer to the first virtual volume and write data of the second write command to another second storage area of the plurality of second storage areas in the allocated particular first storage area irrespective of the address to which the second write command is directed.