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-3493 Lustre <p>One of our luns experienced unreadable sectors. The RAID was able to report which LBAs were affected for the lun/OST. How do we map the LBA to check if any files were affected?</p> CentOS 6.3, SGI IS5500 (Netapp E5400), LU-3493

Need to determine if data was affected by unreadable sectors on RAID.

Task Minor Resolved Done Niu Yawei Herbert Yeung Fri, 21 Jun 2013 23:24:00 +0000 Tue, 29 Sep 2015 08:35:07 +0000 Tue, 29 Sep 2015 08:35:06 +0000 Lustre 2.1.5 0 3 <p>Niu</p> <p>What do you advise here?</p> <p>Peter</p> <p>If you have no partitions on your device, then the LBA (in 512-byte sectors) should be divided by 8 to get 4096-byte filesystem block numbers. Then, use "debugfs -c /dev/XXX" and the "icheck </p> {block} <p> <span class="error">&#91;block ...&#93;</span>" command to map block numbers to inodes. The mapping from OST inodes to Lustre files is described in <a href="http://lists.lustre.org/pipermail/lustre-discuss/2013-April/017204.html" class="external-link" target="_blank" rel="nofollow noopener">http://lists.lustre.org/pipermail/lustre-discuss/2013-April/017204.html</a>. </p> <p>It may be in the manual as well (or should be added if it is not already), I didn't check. </p> <p>Thanks, ran through the LBA list and they were all unallocated.</p> <p>Thats good news Herbert. Is there any further action needed or shall we close out this ticket?</p> <p>This should be added to the user manual if it isn't already there. </p> Development Rank 1|hzvtt3: Rank (Obsolete) 8787