ok, so I have GFS installed and have the modules loaded, seems the next step is to set up "fencing" and looking at the list of agents at, http://www.redhat.com/docs/manuals/csgfs/admin-guide/s1-fence-methods.html im kinda confused. I thought that the idea behind fencing was to allow one node (i have 2) to take down/reboot the other node after it has detected some sort of fault in the other node. so I understand APC Network Power Switch and WTI Network Power Switch but since I dont have any of those installed, Im going down the list and see GNBD and xCAT as options. I dont understand what these software packages are supposed to be doing in relation to being a fencing agent. Can I use one of these options reliably without having a hardware power switch? I guess in short, the docs I have read dont quite explain how fencing is supposed to work with GFS. regards, Jason -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster