A plurality of storage devices with different functions and storage pools with different attributes are automatically associated with each other.A controller: divides a plurality of storage devices into a first storage device(s) which has an encryption function and a second storage device(s) which does not have the encryption function; manages each storage device by associating it with encryption function information indicating whether the encryption function exists or not; manages a first storage pool with a first attribute and a second storage pool with a second attribute by using attribute information; manages a plurality of logical volumes by associating a first logical volume, to which a first physical volume belonging to the first storage pool is allocated, and a second logical volume, to which a second physical volume belonging to the second storage pool is allocated, with encryption attribute information indicating whether the encryption attribute exists or not; and allocating the first storage device(s) as the first physical volume to the first storage pool and the second storage device(s) as the second physical volume to the second storage pool on the basis of the encryption attribute information and the encryption function information.