Bug#567618: error: unknown filesystem.

[Achim Schaefer]

Package: grub-common
Version: 1.98~20100128-1
Severity: normal

Hi,

I think I got exactly the same problem.
It seems to be the fs detection routine for raid 1 mirrors...

data:/tmp# update-grub
Generating grub.cfg ...
/usr/sbin/grub-probe: error: unknown filesystem.
data:/tmp# file -s /dev/md0
/dev/md0: Linux rev 1.0 ext3 filesystem data, UUID=835b0d9b-61a1-422e-8cca-5a61d0a8e9ff (needs journal recovery)
data:/tmp# mdadm --detail /dev/md0
/dev/md0:
        Version : 0.90
  Creation Time : Sun Aug  3 20:00:25 2008
     Raid Level : raid1
     Array Size : 401472 (392.13 MiB 411.11 MB)
  Used Dev Size : 401472 (392.13 MiB 411.11 MB)
   Raid Devices : 2
  Total Devices : 2
Preferred Minor : 0
    Persistence : Superblock is persistent

    Update Time : Mon Feb  1 23:19:43 2010
          State : clean
 Active Devices : 2
Working Devices : 2
 Failed Devices : 0
  Spare Devices : 0

           UUID : 154960e3:46e2060a:6972fb57:3a0241bc
         Events : 0.1088

    Number   Major   Minor   RaidDevice State
       0       3        1        0      active sync   /dev/hda1
       1       8        1        1      active sync   /dev/sda1
data:/tmp# grub-probe --device /dev/md0 --target fs
grub-probe: error: unknown filesystem.
data:/tmp# grub-probe --device /dev/hda1 --target fs
ext2
data:/tmp# grub-probe --device /dev/sda1 --target fs
ext2
data:/tmp#

As you can see my boot device is as well a raid(1) device.
running grub-probe against it with target fs generates an error, while running the same aginst the physical devices is fine.
even file -s reports the correc filesystem-)

Hope this helps.

Achim
-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (800, 'unstable'), (800, 'testing'), (500, 'experimental'), (500, 'stable')
Architecture: i386 (i686)

Kernel: Linux 2.6.33-rc5 (SMP w/1 CPU core)
Locale: LANG=de_LU.UTF-8, LC_CTYPE=de_LU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages grub-common depends on:
ii  base-files              5.1              Debian base system miscellaneous f
ii  dpkg                    1.15.5.6         Debian package management system
ii  gettext-base            0.17-8           GNU Internationalization utilities
ii  install-info            4.13a.dfsg.1-5   Manage installed documentation in 
ii  libc6                   2.10.2-5         Embedded GNU C Library: Shared lib
ii  libfreetype6            2.3.11-1         FreeType 2 font engine, shared lib
ii  zlib1g                  1:1.2.3.4.dfsg-3 compression library - runtime

Versions of packages grub-common recommends:
ii  os-prober                     1.35       utility to detect other OSes on a 

Versions of packages grub-common suggests:
pn  grub-emu                      <none>     (no description available)
pn  multiboot-doc                 <none>     (no description available)

-- no debconf information