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Hello,<br>
Actually I have a problem which could be similar to this:<br>
<br>
<a class="moz-txt-link-freetext"
href="https://groups.google.com/forum/#%21topic/lustre-discuss-list/ED6rxVGuKM8">https://groups.google.com/forum/#!topic/lustre-discuss-list/ED6rxVGuKM8</a><br>
<br>
I am running oss and mds on Centos 6.4 with lustre 2.4<br>
<br>
Suddently my JBOD array failed. It has something like 12 OST on it.<br>
When I established it back, one of the OST was not mounting anymore
from new clients:<br>
<br>
When I try to mount from new clients I get this error: <font
size="2"> failed: Function not implemented</font><br>
<br>
<font size="2">But the old clients which has the OST already mounted
are working fine. Anyway if I dismount the lustre partiion, they
cannot mount it anymore with same error:</font><br>
<br>
<font size="2"> failed: Function not implemented</font><br>
<br>
the mds is running not on the failed JBOD array but on another
storage.<br>
<br>
So I have no clue why this is happening. On the MDS and OSS side I
have no error and no hint in the lustre logs when clients try to
mount.<br>
I have the error on client side and that particular OST cannot be
mounted anymore.<br>
<br>
I already did a fsck on the /mgsgdt device partition which is a LVM.<br>
but this did not help fixing the problem.<br>
<br>
How could I debug what is going wrong ?<br>
It never happened before.<br>
Looks like something is corrupted somewhere but clients which are
already mounting the the OST (thru mds) are working like a charm.<br>
Remounting after dismounting won't work.<br>
I did not reboot the oss yet because I am afraid of the
consequences.<br>
So I first wrote here to have some hint.<br>
<br>
Cheers<br>
<br>
Rick<br>
<br>
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