https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-5923 Lustre <p>After moving a file system running 2.5.2 to master and then moving back, we are unable to mount MDT0:</p> <p>LustreError: 3262:0:(lfsck_namespace.c:147:lfsck_namespace_load()) perses1-MDT0000-: fail to load lfsck_namespace, expected = 256, rc = -34<br/> LustreError: 3262:0:(mdd_device.c:970:mdd_prepare()) perses1-MDD0000: failed to initialize lfsck: rc = -34<br/> LustreError: 3262:0:(mdt_handler.c:6264:mdt_iocontrol()) perses1-MDT0000: Aborting recovery for device<br/> LustreError: 3262:0:(obd_mount_server.c:1739:server_fill_super()) Unable to start targets: -34</p> <p>I've already tried a write_conf, which didn't change anything.</p> <p>If anyone has an idea of the root cause or how to resolve this for the active file system, I'd appreciate the input, as it's down at the moment.</p> File system running 2.5.2 (CentOS 6.5 servers), started with master (most recent commit Ie7a2a98be8cc97db9af7a64476c06fc7321544eb, <a href="http://review.whamcloud.com/12142),">http://review.whamcloud.com/12142),</a> went back to 2.5.2. LU-5923

Master testing: MDT0 not mounting after master downgrade to 2.5

Bug Critical Closed Duplicate WC Triage Patrick Farrell Fri, 14 Nov 2014 16:36:09 +0000 Fri, 14 Nov 2014 18:11:50 +0000 Fri, 14 Nov 2014 18:06:19 +0000 0 2 <p>It looks like the ERANGE is bubbling up out of xattr.c in ldiskfs, which I find worrying.</p> <p>I was able to get the file system to start again by mounting the MDT as ldiskfs and removing the 'lfsck_namespace' file. I'll attach that file here.</p> <p>lfsck_namespace file from the affected system. Removing this file fixed the -ERANGE error.</p> <p>Mount the MDT as type ldiskfs and delete the lfsck_namespace file. This is a bug in the current master code that is being fixed before release. </p> <p>The patch <a href="http://review.whamcloud.com/12321" class="external-link" target="_blank" rel="nofollow noopener">http://review.whamcloud.com/12321</a> from <a href="https://jira.whamcloud.com/browse/LU-5707" title="LFSCK 3: cannot load namespace LFSCK tracing file after downgrade from Lustre-2.7" class="issue-link" data-issue-key="LU-5707"><del>LU-5707</del></a> should fix this bug. A separate patch to b2_5 will allow it to mount the filesystem even if there is a problem loading this file. </p> <p>Thanks, Andreas - As you saw, I figured out the workaround right before you posted. I appreciate the quick response. I'll also review that patch...</p> Duplicate LU-5707 LU-5707 Development Rank 1|hzx0yf: Rank (Obsolete) 16532 Severity