[Lustre-discuss] e2fsck issue

[Christos Theodosiou]

Hi Wojciech,

upgrading e2fsprog worked fine.

Thank you
Christos


On 04/13/2011 02:29 PM, Wojciech Turek wrote:
> Hi Christos,
>
> As far as I remember the mmp implementation in the default Lustre 
> e2fsprog has a bug where you can not access filesystem in readonly 
> mode as long as the filesystem is mounted. I downloaded a newer 
> version of the e2fsprog tools which doesn't have that fault and I have 
> been successfully using this version for 6 months now.
>
> e2fsprogs-1.41.12.2.ora1-0redhat.x86_64
> e2fsprogs-devel-1.41.12.2.ora1-0redhat.x86_64
>
> So if you upgrade your e2fsprogs to newer version you should not have 
> a problem to run fsck with -n
>
> Other option you have is to temporarily disable the MMP protection but 
> I am not sure if you can do that while device is mounted.
>
> Best regards,
>
> Wojciech
>
>
> On 13 April 2011 09:29, Christos Theodosiou <ctheodos at grid.auth.gr 
> <mailto:ctheodos at grid.auth.gr>> wrote:
>
>     Hi all,
>
>     I am trying to perform a file-system check on a mounted lustre
>     file-system.
>
>     The e2fsck fails with the following message:
>
>     > e2fsck -n -v --mdsdb /tmp/mdsdb /dev/msavg/lv001
>     e2fsck 1.41.10.sun2 (24-Feb-2010)
>     device /dev/mapper/msavg-lv001 mounted by lustre per
>     /proc/fs/lustre/mds/lustrefs-MDT0000/mntdev
>     Warning!  /dev/msavg/lv001 is mounted.
>     e2fsck: MMP: device currently active while trying to open
>     /dev/msavg/lv001
>
>     The superblock could not be read or does not describe a correct ext2
>     filesystem.  If the device is valid and it really contains an ext2
>     filesystem (and not swap or ufs or something else), then the
>     superblock
>     is corrupt, and you might try running e2fsck with an alternate
>     superblock:
>         e2fsck -b 32744 <device>
>
>     I tried setting -b argument but the message persists.
>
>     Do you have any suggestions on how to proceed.
>
>     Best regards
>     Christos
>
>     --
>     Christos Theodosiou
>     Scientific Computational Center
>     Aristotle University
>     54 124 Thessaloniki, Greece
>     Tel: +30 2310 99 8988
>     Fax: +30 2310 99 4309
>     http://www.grid.auth.gr
>
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>
>
>
>
> -- 
> Wojciech Turek
>
> Senior System Architect
>
> High Performance Computing Service
> University of Cambridge
> Email: wjt27 at cam.ac.uk <mailto:wjt27 at cam.ac.uk>
> Tel: (+)44 1223 763517


-- 
Christos Theodosiou
Scientific Computational Center
Aristotle University
54 124 Thessaloniki, Greece
Tel: +30 2310 99 8988
Fax: +30 2310 99 4309
http://www.grid.auth.gr

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