Did you edit the lvm.conf to enable cluster locking >From http://sources.redhat.com/cluster/doc/usage.txt Update lvm2.conf ---------------- Standard lvm commands are "clusterized" (told to talk to the clvm daemon) by using the following two lines in /etc/lvm/lvm.conf: locking_type = 3 locking_library = "/lib/liblvm2clusterlock.so" -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster