Public bug reported:
Binary package hint: e2fsprogs
After a crash of Ubuntu netbook, the machine hang with initramfs (I
have a /boot and /).
Booting with the same system (ubuntu 10.10) from thumb drive, I cannot fsck it:
$ sudo fsck /dev/sda2
fsck from util-linux-ng 2.17.2
e2fsck 1.41.12 (17-May-2010)
fsck.ext4: Device or resource busy while trying to open /dev/sda2
Filesystem mounted or opened exclusively by another program?
But it is not mounted:
$ cat /proc/mounts
shows that it is not mounted; and it can't be unmounted.
dmesg knows what is going on:
$ dmesg | grep sda2
[ 6.513953] sda: sda1 [01;31m [Ksda2 [m [K sda3 < sda5 > sda4
[ 9.300388] EXT4-fs ( [01;31m [Ksda2 [m [K): INFO: recovery
required on readonly filesystem
[ 9.300398] EXT4-fs ( [01;31m [Ksda2 [m [K): write access will be
enabled during recovery
[ 9.312706] EXT4-fs warning (device [01;31m [Ksda2 [m [K):
ext4_clear_journal_err: Filesystem error recorded from previous mount:
IO failure
[ 9.312729] EXT4-fs warning (device [01;31m [Ksda2 [m [K):
ext4_clear_journal_err: Marking fs in need of filesystem check.
$
But this fsck does never materialise, and can't be done manually.
Finally, I tried to delete the journal, but to no avail, the "Device
or resource busy" stays. Is there any way to trick fsck into believing
me that it is not mounted?
If not, I still consider the behaviour somewhat wrong: if not in
/proc/mount, why does fsck say so?
And when I
sudo mount /dev/sda2 /mnt
it starts the mount process, but never finishes, and also it is
impossible to ever exit this process, I tried with Ctrl-C, Ctrl-Z, and
even with kill -9 from another console. Ubuntu isn't even able to shut
down then, but keeps trying forever.
In a nutshell, it is a bug in 10.10. I use the installer-CD written to the
thumb drive (Startup Disk creator).
Confirmed: Because when I boot with a 9.04 thumb drive, I can easily open a
terminal and run fsck. Done and over.
** Affects: e2fsprogs (Ubuntu)
Importance: Undecided
Status: New
** Tags: fsck.ext4 mount
** Tags added: fsck.ext4 mount
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https://bugs.launchpad.net/bugs/711799
Title:
e2fsprogs wrongly identifies ext4 as mounted
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