Allows the specified logical unit and all units in the disk/
             disk group to utilize more disks. The EXPAND command does not
             increase the size of the logical unit but it merely adds more
             disks, appending extra space on each individual disk.

             To increase the size we need to use the "/EXTEND" qualifier
             after expanding the unit.

             During expansion of units of a drive group the RAID level of
             certain units might be changed. For example, if an unit of
             RAID level 1 with 2 disks is expanded to 3 disks, then
             the RAID level will change to RAID 5 as RAID 1 unit does not
             support odd number of disks.

             When expanding a unit with other units present on the same set
             of drives, all units will undergo volume expansion.

             Format:
                     SET UNIT <Unit_n>/EXPAND/DISK=<diskrange>

                     where Unit_n = (0-31)

                      Note:

                           - Diskrange must include both pre-expand disks and
                             the additional disks. Examples of diskrange are:
                             101, (101,112,314,..)

                           - Only /DISK qualifier should be used in
                             conjunction with the /EXPAND qualifier

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