I believe I just tripped this bug; I compressed some qcow2 images using this:
for f in sec-{lucid,precise,quantal,saucy,trusty}-{amd64,i386} ; do echo $f ; qemu-img convert -s pristine -p -f qcow2 -O qcow2 $f.qcow2 reclaimed.qcow2 ; mv reclaimed.qcow2 $f.qcow2 ; virsh snapshot-delete $f --snapshotname pristine ; uvt snapshot $f ; done The 'uvt snapshot' command makes a snapshot named 'pristine'. AMD64 guests: sec-lucid-amd64 booted without trouble. sec-precise-amd64 reports: Booting from Hard Disk... Boot failed: not a booktable disk No bootable device. sec-quantal-amd64 reports: Booting from Hard Disk... error; file `/boot/grub/i386-pc/normal.mod' not found. grub rescue> sec-saucy-amd64 reports: Booting from Hard Disk... error: file `/boot/grub/i386-pc/normal.mod' not found. Entering rescue mode... grub rescue> sec-trusty-amd64 reports: Booting from Hard Disk... Boot failed: not a bootable disk No bootable device. i386 guests: sec-lucid-i386, sec-precise-i386, sec-quantal-i386, sec-saucy-i386 all booted fine. sec-trusty-i386 reports: Booting from Hard Disk... Boot failed: not a bootable disk No bootable device. I use the i386 VMs significantly less often than the amd64 VMs. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1292234 Title: qcow2 image corruption in trusty (qemu 1.7 and 2.0 candidate) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qemu/+bug/1292234/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs