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-1375 Lustre <p>I am using the 1.8.7 kernel with RHEL 5.4. The RPMs I have are:</p> <p>e2fsprogs-1.41.90.wc3-0redhat<br/> e2fsprogs-devel-1.41.90.wc3-0redhat<br/> lustre-1.8.7-wc1_2.6.18_274.3.1.el5_lustre.g9500ebf</p> <p>When I try to build a OST greater than 24TB, it fails, with the following message in dmesg:</p> <p>LDISKFS-fs does not support filesystems greater than 24TB and can cause data corruption.Use "force_over_24tb" mount option to override.</p> <p>That sounds pretty bad.</p> <p>How risky is it to use a LUN greater than 24TB?</p> <p>Are there some known issues with it? If so, what are they?</p> <p>In any case, where does this parameter go in the following command line:</p> <p>mkfs.lustre --reformat --ost --mkfsoptions="-m 0 " --fsname big --mgsnode=${MGSNODE} /dev/mapper/map00 </p> <p>?</p> <p>I tried using --force_over_24tb as an option to mkfs.lustre. This gave me:</p> <p> mkfs.lustre: unrecognized option `--force_over_24tb'</p> <p>I tried -O force_over_24tb added to mkfsoptions. This gave me:</p> <p> Warning: the fs_type huge is not defined in mke2fs.conf<br/> Invalid filesystem option set: force_over_24tb,extents,uninit_bg,dir_nlink,huge_file,64bit,flex_bg</p> <p>Thanks.</p> I am using the 1.8.7 kernel with RHEL 5.4. The RPMs I have are:<br/> <br/> e2fsprogs-1.41.90.wc3-0redhat<br/> e2fsprogs-devel-1.41.90.wc3-0redhat<br/> lustre-1.8.7-wc1_2.6.18_274.3.1.el5_lustre.g9500ebf LU-1375

Are LUNs over 24T safe in Lustre 1.8.7?

Bug Minor Resolved Fixed Peter Jones Roger Spellman Fri, 4 May 2012 12:09:52 +0000 Mon, 4 Jun 2012 05:52:13 +0000 Mon, 4 Jun 2012 05:52:13 +0000 0 0 <p>Roger</p> <p>We have only tested up to 24TB LUNs for 1.8.x releases. If you need larger LUN sizes it would be recommended to use a 2.1.x release</p> <p>Regards</p> <p>Peter</p> Development Rank 1|hzvh0v: Rank (Obsolete) 6407 Severity