[linux-lvm]Re: corrupt /dev/lvm - bizzare properties
chris.doherty at adelaide.edu.au
Sun Feb 8 22:29:06 UTC 2004
Måns Rullgård wrote:
> Chris Doherty <chris.doherty at adelaide.edu.au> writes:
>>>>>>root at connect4:~# ls -la /dev/lvm
>>>>>>?---rws-w- 8306 840966198 976250230 875573298 Sep 24 2004 /dev/lvm
>>>>>Your filesystem seems to have taken some heavy blows. You should fsck
>>>>>it properly. You might need the -f flag to fsck to force a complete
>>>>>check if filesystem is marked clean.
>>>>the filesystem can't be mounted (which is the really worrying part) so i
>>>>can't fsck it.
>>>A filesystem that is to be fscked can and may *never* be mounted when
>>>performing an fsck. Usually all fsck tools won't do anything but stop if the
>>oops, sorry my last statement was ambiguous. what i meant was that the
>>filesystem can't be mounted *and* fsck refuses to acknowledge that it is (or
>>was?) a filesystem.
> The filesystem containing /dev has been damaged somehow. You should
> fsck it. Most likely fsck will remove /dev/lvm so you'll have to
> recreate it with proper values. Don't just rm it. Something bad has
> obviously happened and changing things without a proper fsck can make
> things worse.
thanks. i'll try this tonight and report back. :) my limited understanding
of LVM leads me to believe that the volume group and logical volume within it
are actually still safe and sound in /dev/vg1
>>root at connect4:~# ls /dev/vg1/
>>dr-xr-xr-x 2 root root 4096 Feb 6 18:46 ./
>>drwxr-xr-x 22 root root 118784 Feb 8 14:19 ../
>>crw-r----- 1 root disk 109, 0 Feb 6 18:46 group
>>brw-rw---- 1 root disk 58, 0 Feb 6 18:46 lv1
the partition tables on the disks (hdc and hdd) still look ok (sorry i'm at
work now and don't have the output of fdisk to demonstrate it) so i expect the
contents of those disks is also ok. as i've already shown, i can't check the
the LVM physical volumes with pvdisplay because the kernel module won't /
can't be loaded.
is /dev/lvm just a character device which is used to transmit data from the
volume group (vg1) to the device driver? you mention that fsck will probably
remove /dev/lvm and that i should recreate it. is there any risk to vg1/lv1
if i do that? (as i still haven't successfully backed up anything in it's
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