I just converted a shared file-backed Xen VM GFS filesystem to a GFS2 filesystem. The conversion was successfully and all my files appear intact. I followed the GFS instructions by unmounting the filesystem on all machines, running gfs_fsck, and gfs2_covert. Since I converted the filesystem, all my file-backed Xen VMs can no longer boot. pygrub reports errors that the boot loader isn't returning any data. If I edit the Xen config to boot of a kernel on the DomU, VMs still can't start up because LVM cannot identify any volume groups. If I try to access the VM device files locally via losetup and kpartx, I get "read errors". So what's the deal I know GFS2 is a preview, but I have to assume I've missed some crucial step here. -- Dave Costakos mailto:<a href="mailto:david.costakos@gmail.com">david.costakos@gmail.com</a>