Thanks Andreas, I'm aware that index 51 actually translates to hex 33 (local-OST0033_UUID). I don't believe that's the reason for the failed mount as it is only an index that I increase for every new OST and there are no duplicates.
lctl dk show tens of thousands of lines repeating the same error after attempting to mount the OST: 00100000:10000000:26.0:1625546374.322973:0:248211:0:(osd_scrub.c:2039:osd_ios_scan_one()) local-OST0033: fail to set LMA for init OI scrub: rc = -30 00100000:10000000:26.0:1625546374.322974:0:248211:0:(osd_scrub.c:2039:osd_ios_scan_one()) local-OST0033: fail to set LMA for init OI scrub: rc = -30 00100000:10000000:26.0:1625546374.322975:0:248211:0:(osd_scrub.c:2039:osd_ios_scan_one()) local-OST0033: fail to set LMA for init OI scrub: rc = -30 in /var/log/messages I see the following corresponding to dm21 which is the new OST: Jul 6 07:38:37 oss03 kernel: LDISKFS-fs warning (device dm-21): ldiskfs_multi_mount_protect:322: MMP interval 42 higher than expected, please wait. Jul 6 07:39:19 oss03 kernel: LDISKFS-fs (dm-21): file extents enabled, maximum tree depth=5 Jul 6 07:39:19 oss03 kernel: LDISKFS-fs warning (device dm-21): ldiskfs_clear_journal_err:4862: Filesystem error recorded from previous mount: IO failure Jul 6 07:39:19 oss03 kernel: LDISKFS-fs warning (device dm-21): ldiskfs_clear_journal_err:4863: Marking fs in need of filesystem check. Jul 6 07:39:19 oss03 kernel: LDISKFS-fs (dm-21): warning: mounting fs with errors, running e2fsck is recommended Jul 6 07:39:22 oss03 kernel: LDISKFS-fs (dm-21): recovery complete Jul 6 07:39:22 oss03 kernel: LDISKFS-fs (dm-21): mounted filesystem with ordered data mode. Opts: user_xattr,errors=remount-ro,acl,no_mbcache,nodelalloc Jul 6 07:39:22 oss03 kernel: LDISKFS-fs error (device dm-21): htree_dirblock_to_tree:1278: inode #2: block 21233: comm mount.lustre: bad entry in directory: rec_len is too small for name_len - offset=4084(4084), inode=0, rec_len=12 , name_len=0 Jul 6 07:39:22 oss03 kernel: Aborting journal on device dm-21-8. Jul 6 07:39:22 oss03 kernel: LDISKFS-fs (dm-21): Remounting filesystem read-only Jul 6 07:39:24 oss03 kernel: LDISKFS-fs warning (device dm-21): kmmpd:187: kmmpd being stopped since filesystem has been remounted as readonly. Jul 6 07:44:22 oss03 kernel: LDISKFS-fs (dm-21): error count since last fsck: 6 Jul 6 07:44:22 oss03 kernel: LDISKFS-fs (dm-21): initial error at time 1625367384: htree_dirblock_to_tree:1278: inode 2: block 21233 Jul 6 07:44:22 oss03 kernel: LDISKFS-fs (dm-21): last error at time 1625546362: htree_dirblock_to_tree:1278: inode 2: block 21233 As I mentioned before mount never completes so the only way out of that is force reboot. Thanks, David On Tue, Jul 6, 2021 at 8:07 AM Andreas Dilger <adil...@whamcloud.com> wrote: > > > On Jul 5, 2021, at 09:05, David Cohen <cda...@physics.technion.ac.il> > wrote: > > Hi, > I'm using Lustre 2.10.5 and lately tried to add a new OST. > The OST was formatted with the command below, which other than the index > is the exact same one used for all the other OSTs in the system. > > mkfs.lustre --reformat --mkfsoptions="-t ext4 -T huge" --ost > --fsname=local --index=0051 --param ost.quota_type=ug > --mountfsoptions='errors=remount-ro,extents,mballoc' --mgsnode=10.0.0.3@tcp > --mgsnode=10.0.0.1@tc > p --mgsnode=10.0.0.2@tcp --servicenode=10.0.0.3@tcp > --servicenode=10.0.0.1@tcp --servicenode=10.0.0.2@tcp /dev/mapper/OST0051 > > > Note that your "--index=0051" value is probably interpreted as an octal > number "41", it should be "--index=0x0051" or "--index=0x51" (hex, to match > the OST device name) or "--index=81" (decimal). > > > When trying to mount the with: > mount.lustre /dev/mapper/OST0051 /Lustre/OST0051 > > The system stays on 100% CPU (one core) forever and the mount never > completes, not even after a week. > > I tried tunefs.lustre --writeconf --erase-params on the MDS and all the > other targets, but the behaviour remains the same. > > > Cheers, Andreas > -- > Andreas Dilger > Lustre Principal Architect > Whamcloud > > > > > > > >
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