[karmic] fsck on mounted filesystems breaks boot

[Stefan Fleiter]

Binary package hint: upstart

As always with karmic as of today and this time also
with current ubuntu-boot PPA.

If any filesystem except "/" has an fstab(5) fs_passno value other than "0"
booting stops because fsck complains about not wanting to check
a mounted file system.
This bug was triggered by setting fs_passno of /boot to "2".

boot messages
######################################################################
 * Starting early crypto disks... [ OK ]
 * Starting remaining crypto disks... [ OK ]
 * Checking file systems...
fsck from util-linux-ng 2.16
/dev/sda6 is mounted. e2fsck: Cannot continue, aborting.

fsck died with exit status 8
                                                                         [fail]
 * File system check failed.
A log is being saved in /var/log/fsck/checkfs if that location is writable.
Please repair the file system manually.
 * A maintenance shell will now be started.

/var/log/fsck/checkfs
######################################################################
Log of fsck -C -R -A -a·
Tue Sep 22 01:58:48 2009

fsck from util-linux-ng 2.16
/dev/sda6 is mounted. e2fsck: Cannot continue, aborting.

fsck died with exit status 8

Tue Sep 22 01:58:52 2009
----------------

mount information at problem time
######################################################################
# cat /proc/mounts | grep boot
/dev/sda6 /boot ext2 rw,noatime,errors=continue 0 0
# mount | grep boot
/dev/sda6 on /boot type ext2 (rw,noatime)

fstab
######################################################################
proc /proc proc defaults 0 0
/dev/mapper/root / ext4 errors=remount-ro,user_xattr,noatime 0 1
/dev/sda6 /boot ext2 defaults,noatime 0 0
/dev/mapper/home /home ext4 defaults,user_xattr,noatime 0 0
/dev/mapper/var /var btrfs defaults,user_xattr,noatime 0 0
UUID=3a8850d6-dacf-4521-8b2b-a7ad4e0fe440 none swap sw 0 0
/dev/scd0 /media/cdrom0 udf,iso9660 user,noauto,exec 0 0