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<p class="MsoNormal">I am by no means a Lustre expert and am seeking some help with our system. I am not able to get log file to post as the servers are in the closed area with no access to the Internet.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is a bit of history of our system:<o:p></o:p></p>
<p class="MsoNormal">The OSS and MDS nodes were RHEL6 and running a Luster server the kernel 2.6.32-431.23.3.el6_lustre.x86_64 and the Lustre version of 2.5.3. the client version was 2.10. That was in a working state.
<o:p></o:p></p>
<p class="MsoNormal">We upgraded the OSS ad MDS nodes to RHEL7 and installed Lustre server 2.12 software and kernel.<o:p></o:p></p>
<p class="MsoNormal">The attached 11 LUNs are showing up as /dev/sdb - /dev/sdl<o:p></o:p></p>
<p class="MsoNormal">Right now, on the OSS nodes, if I use the command tunefs.luster /dev/sdb I get some data back saying that Lustre data has been found but at the bottom of the out put it shows “tunefs.lustre: Unable to mount /dev/sdb: No such device” and
“Is the ldiskfs module available”<o:p></o:p></p>
<p class="MsoNormal">When I do a “modprobe -v lustre” I do not see ldiskfs.ko as being loaded even though there is a ldiskfs.ko file in /lib/modules/3.10.0-1160.2.1.el7_lustre.x86_64/extra/lustre/fs directory. I am not sure how to get it to load in the modprobe
command.<o:p></o:p></p>
<p class="MsoNormal">I used “insmod /lib/modules/3.10.0-1160.2.1.el7_lustre.x86_64/extra/lustre/fs/ ldiskfs.ko” and re-ran the “tunefs.luster /dev/sdb” command with the same result.<o:p></o:p></p>
<p class="MsoNormal">If I use the same command on the MDS nodes I get “no Lustre data found and /dev/sdb has not been formatted with mkfs.lustre”. I am not sure that is what is needed here as the MDS nodes do not really have the lustre data as it is the meta
data server.<o:p></o:p></p>
<p class="MsoNormal">I tried to use the command “tunefs.lustre --mgs --erase_params --mgsnode=<IP address>@tcp --writeconf --dryrun /dev/sdb” and get the error “/dev/sdb has not been formatted with mkfs.lustre”.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I need some help and guidance and I can provide what may be needed though it will need to be typed out as I am not able to get actual log files from the system.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Dean Stephens<o:p></o:p></p>
<p class="MsoNormal">CACI<o:p></o:p></p>
<p class="MsoNormal">Linux System Admin<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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