Further to the top post in this thread (my own) here's some further debugging information which may assist. # pvchange -v -t -d -u /dev/sda2 Test mode: Metadata will NOT be updated. Using physical volume(s) on command line Found duplicate PV g7ZWtzNQcHx2PMQghP0NBHDXuYcaYqAt: using /dev/sdb2 not /dev/sda2 Finding volume group VolGroup00 of physical volume /dev/sdb2 Volume group containing /dev/sdb2 has active logical volumes 0 physical volumes changed / 1 physical volume not changed Test mode: Wiping internal cache Wiping internal VG cache It appears that even if there were a forced-mode, this command would not operate on /dev/sda2 as specified, but rather on the /dev/sdb2 device. Is this the correct interpretation of these results? Would changing the UUID on /dev/sda2 solve this particular problem anyway? Best wishes, Michael _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/