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Hi Wojciech,<br>
<br>
upgrading e2fsprog worked fine.<br>
<br>
Thank you<br>
Christos<br>
<br>
<br>
On 04/13/2011 02:29 PM, Wojciech Turek wrote:
<blockquote
cite="mid:BANLkTikHAQqX_4ng8y2UYyU-=FcY4b7EVA@mail.gmail.com"
type="cite">Hi Christos,<br>
<br>
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 I downloaded a newer
version of the e2fsprog tools which doesn't have that fault and I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.<br>
<br>
e2fsprogs-1.41.12.2.ora1-0redhat.x86_64<br>
e2fsprogs-devel-1.41.12.2.ora1-0redhat.x86_64<br>
<br>
So if you upgrade your e2fsprogs to newer version you should not
have a problem to run fsck with -n<br>
<br>
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.<br>
<br>
Best regards,<br>
<br>
Wojciech<br>
<br>
<br>
<div class="gmail_quote">On 13 April 2011 09:29, Christos
Theodosiou <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:ctheodos@grid.auth.gr">ctheodos@grid.auth.gr</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
Hi all,<br>
<br>
I am trying to perform a file-system check on a mounted lustre
file-system.<br>
<br>
The e2fsck fails with the following message:<br>
<br>
> e2fsck -n -v --mdsdb /tmp/mdsdb /dev/msavg/lv001<br>
e2fsck 1.41.10.sun2 (24-Feb-2010)<br>
device /dev/mapper/msavg-lv001 mounted by lustre per<br>
/proc/fs/lustre/mds/lustrefs-MDT0000/mntdev<br>
Warning! /dev/msavg/lv001 is mounted.<br>
e2fsck: MMP: device currently active while trying to open
/dev/msavg/lv001<br>
<br>
The superblock could not be read or does not describe a
correct ext2<br>
filesystem. If the device is valid and it really contains an
ext2<br>
filesystem (and not swap or ufs or something else), then the
superblock<br>
is corrupt, and you might try running e2fsck with an alternate
superblock:<br>
e2fsck -b 32744 <device><br>
<br>
I tried setting -b argument but the message persists.<br>
<br>
Do you have any suggestions on how to proceed.<br>
<br>
Best regards<br>
Christos<br>
<br>
--<br>
Christos Theodosiou<br>
Scientific Computational Center<br>
Aristotle University<br>
54 124 Thessaloniki, Greece<br>
Tel: +30 2310 99 8988<br>
Fax: +30 2310 99 4309<br>
<a moz-do-not-send="true" href="http://www.grid.auth.gr"
target="_blank">http://www.grid.auth.gr</a><br>
<br>
_______________________________________________<br>
Lustre-discuss mailing list<br>
<a moz-do-not-send="true"
href="mailto:Lustre-discuss@lists.lustre.org">Lustre-discuss@lists.lustre.org</a><br>
<a moz-do-not-send="true"
href="http://lists.lustre.org/mailman/listinfo/lustre-discuss"
target="_blank">http://lists.lustre.org/mailman/listinfo/lustre-discuss</a><br>
</blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
Wojciech Turek<br>
<br>
Senior System Architect<br>
<br>
High Performance Computing Service<br>
University of Cambridge<br>
Email: <a moz-do-not-send="true" href="mailto:wjt27@cam.ac.uk"
target="_blank">wjt27@cam.ac.uk</a><br>
Tel: (+)44 1223 763517 <br>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Christos Theodosiou
Scientific Computational Center
Aristotle University
54 124 Thessaloniki, Greece
Tel: +30 2310 99 8988
Fax: +30 2310 99 4309
<a class="moz-txt-link-freetext" href="http://www.grid.auth.gr">http://www.grid.auth.gr</a></pre>
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