Hello All, We're planning an upgrade of a pair of F740 filers in snapmirror configuration from DOT 5.3.6R1P1D1 to DOT 6.1R1. The F740s currently support FC8 & FC9 shelves with 18G drives. In addition to the mandatory firmware upgrade to the filers, we are also planning the addition of a new FC9 shelf of 7/72G drives to be served by a dedicated FC adapter on each filer. Network Appliance has indicated we should upgrade the target filer first, then the source machine. Otherwise, we expect no worries. Does anyone have experiences, good or bad, with DOT 6.1R1 and snapmirror that we should be aware of? Thanks, Bob Francett BP Exploration (Alaska)