On Tue, Aug 09, 2016 at 05:15:34PM +0000, Andre Goree wrote: > The host is running Ubuntu 12.04 LTS and has the libguestfs package installed -- which, if I'm not mistaken, provides libguestfs-xfs: > > https://launchpad.net/ubuntu/+source/libguestfs My bad, I didn't read the kernel message closely. If you look at: > > mount -o /dev/vda1 /sysroot/ > > [ 1.759120] SGI XFS with ACLs, security attributes, realtime, large block/inode numbers, no debug enabled > > [ 1.762869] XFS (vda1): Version 5 superblock detected. This kernel has EXPERIMENTAL support enabled! > > [ 1.762869] Use of these features in this kernel is at your own risk! > > [ 1.764819] XFS (vda1): Superblock has unknown read-only compatible features (0x1) enabled. > > [ 1.765834] XFS (vda1): Attempted to mount read-only compatible filesystem read-write. > > [ 1.765834] Filesystem can only be safely mounted read only. > > [ 1.767472] XFS (vda1): SB validate failed with error 22. > > mount: wrong fs type, bad option, bad superblock on /dev/vda1, > > missing codepage or helper program, or other error > > In some cases useful info is found in syslog - try > > dmesg | tail or so It's using your host kernel (which for Ubuntu 12.04 is ancient history) to mount a recently created XFS filesystem (Fedora 24 is from this year). This isn't possible because of some new feature or other, and so you can only mount it in read-only mode. Hopefully using 'guestmount --ro' will work. You can check using the 'guestmount -v' and/or '-x' option that the "ro" option is passed by mount to the kernel. If not then it'll be accessible via guestfish using the "mount-ro" command. Of course this is for reading only. It's not possible to write unless you can upgrade your host kernel to something very much newer. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into KVM guests. http://libguestfs.org/virt-v2v _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
