The installation of grub2 fails when _any_ snapshot is present. Not only on the root filesystem (or boot), not even mounted. In my system it was a snapshot of a WinXP volume used by KVM. Deleting it worked just fine.
r...@lxbsc02:/# grub-install /dev/sda /usr/sbin/grub-probe: error: no mapping exists for `wdc750g-root'. Auto-detection of a filesystem module failed. Please specify the module with the option `--modules' explicitly. r...@lxbsc02:~# lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert home wdc750g -wi-ao 40,00g kvm-winxp wdc750g owi-a- 20,00g kvm-winxp-snap wdc750g swi-a- 8,00g kvm-winxp 10,81 root wdc750g -wi-ao 20,00g swap wdc750g -wi-ao 4,00g torrent wdc750g -wi-ao 200,00g r...@lxbsc02:~# lvremove wdc750g/kvm-winxp-snap Do you really want to remove active logical volume kvm-winxp-snap? [y/n]: y Logical volume "kvm-winxp-snap" successfully removed r...@lxbsc02:~# grub-install /dev/sda Installation finished. No error reported. This is a clusterf*ck of a bug. -- Disk not found when booting mdadm RAID1 with snapshotted lvm volume https://bugs.launchpad.net/bugs/563895 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
