In order to set up a Global Mirror session you must first establish PPRC-XD pairs. For information on PPRC-XD, refer to Managing PPRC extended distance mode. You must then establish the PPRC-XD secondaries as source in FlashCopy® relationships, specifying the ASYNC MODE parameter. See Subparameters for REQUEST=FCESTABLISH.
If you withdraw an existing FlashCopy relationship in a Global Mirror session, the next consistency group will fail.