>>-+--------------------------+--------------------------------><
   |            .-NONE------. |   
   '-ZCOMPress--+-----------+-'   
                +-PREFerred-+     
                '-REQuired--'     

ZCOMPRESS specifies that DFSMSdss writes the dumped data in compressed format to the output medium using zEDC Services. This decreases the space occupied by the dumped data.

NONE requests that DFSMSdss not perform compression with zEDC Services. This is the default behavior and specifying this option is not necessary to bypass zCompression.

PREFERRED specifies that DFSMSdss use zEDC Services, if possible. If zEDC Services are not available or cannot be used, DFSMSdss continues processing normally.

REQUIRED specifies that compression via zEDC Services must be used. If they are not available or cannot be used, DFSMSdss fails the operation.