Specifies the disks to be used to form the UNIT.
            Multiple disks must be enclosed in parenthesis. This qualifier
            should be used only in conjunction with the /EXPAND qualifier
            to expand the disks used by the existing unit.

            Format:
                    /DISK=(disk numbers[,...])

            Note: The disk numbers for the existing disks can be obtained
                  using the SHOW DISKS command.