ok, i can only assume that when switches lost connectivity, somebody created alias/zones on one of the sides, either Brocade or McData or both. Now when you try to reconnect both switches they segment. Did i get this right ?  I would export config from each switch to a text file and compare configuration to make sure there are no identical zones/alias with different members ..what i mentioned above in the thread.
i am having a problem about zone missmatch, i have use the zone merge utility to fix this but my fabric is defined  between  1 switch ds4700 mcdata and the other one is a brocade ds5000b and the application is too old. and does not recognize mcdata switches any one knows how to solve this.  thank you
need zone merge appication to use between mcdata and brocade switch