https://bugzilla.novell.com/show_bug.cgi?id=767272 https://bugzilla.novell.com/show_bug.cgi?id=767272#c7 --- Comment #7 from Agnelo de la Crotche <hippolyte@shaw.ca> 2012-07-07 05:42:34 UTC --- OK. just got it here on 12.1 with os-prober 1.53 (but as I aready said, it affects all versions) after updating the kernel and running updategrub, which uses os-prober. Ubuntu 11.10 boot entry was missing. I then run os-prober with the DEBUG flag. OSPDEBUG=yes os-prober No volume groups found mount: unknown filesystem type 'vfat' /dev/sda13:Fedora release 16 (Verne):Fedora:linux /dev/sda15:Debian GNU/Linux (squeeze/sid):Debian:linux mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: wrong fs type, bad option, bad superblock on /dev/sda6, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so mount: unknown filesystem type 'vfat' mount: unknown filesystem type 'vfat' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' /dev/sdc6:Gentoo Base System release 1.12.13:Gentoo:linux The "unknown filesystem" errors are irrelevant and will go away after I reboot. os-prober could not mount /dev/sda6 read-only. I try to mount it manually. mount -v -o ro /dev/sda6 /mnt mount: you didn't specify a filesystem type for /dev/sda6 I will try type ext4 /dev/sda6 on /mnt type ext4 (ro) And it works, without complaining I could have specified the file system but os-prober doesn't either (I might have to double check though). Now I can either leave /dev/sda6 mounted or unmount it. I doesn't matter. os-prober will work this time. OSPDEBUG=yes os-prober No volume groups found mount: unknown filesystem type 'vfat' /dev/sda13:Fedora release 16 (Verne):Fedora:linux /dev/sda15:Debian GNU/Linux (squeeze/sid):Debian:linux mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' /dev/sda6:Ubuntu 11.10 (11.10):Ubuntu:linux mount: unknown filesystem type 'vfat' mount: unknown filesystem type 'vfat' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' mount: unknown filesystem type 'ufs' /dev/sdc6:Gentoo Base System release 1.12.13:Gentoo:linux As you can see, Ubuntu (/dev/sda6) was found this time. So why did it fail the first time? It the fs would have been unstable, manual (ro) mounting wouldn't have worked either. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.