[Lustre-discuss] problems after MDT migration

[Christopher Walker]

Hello,

We're migrating our MDT/MGS and have hit a snag.  I've tarred all files 
on the MDT and moved them to the new MDT, untarred them, and set their 
extended attributes.  When I try to mount the MDT, however, I get the 
following:

[root at circemds1 ~]# mount -t lustre /dev/sdb1 /mnt/lustre/mdt/
mount.lustre: mount /dev/sdb1 at /mnt/lustre/mdt failed: No such file or 
directory
Is the MGS specification correct?
Is the filesystem name correct?
If upgrading, is the copied client log valid? (see upgrade docs)

while /var/log/messages shows:
Oct 16 13:48:41 circemds1 kernel: LustreError: 
20338:0:(mgs_fs.c:201:mgs_fs_setup()) __iopen__ directory has no inode? 
rc = -2
Oct 16 13:48:41 circemds1 kernel: LustreError: 
20338:0:(mgs_handler.c:162:mgs_setup()) MGS: MGS filesystem method init 
failed: rc = -2
Oct 16 13:48:41 circemds1 kernel: LustreError: 
20338:0:(obd_config.c:332:class_setup()) setup MGS failed (-2)
Oct 16 13:48:41 circemds1 kernel: LustreError: 
20338:0:(obd_mount.c:454:lustre_start_simple()) MGS setup error -2
Oct 16 13:48:41 circemds1 kernel: LustreError: 
20338:0:(obd_mount.c:119:server_deregister_mount()) MGS not registered
Oct 16 13:48:41 circemds1 kernel: LustreError: 
20338:0:(obd_mount.c:119:server_deregister_mount()) Skipped 1 previous 
similar message
Oct 16 13:48:41 circemds1 kernel: LustreError: 15e-a: Failed to start 
MGS 'MGS' (-2).  Is the 'mgs' module loaded?
Oct 16 13:48:41 circemds1 kernel: LustreError: 
20338:0:(obd_mount.c:1382:server_put_super()) no obd circelfs-MDTffff
Oct 16 13:48:41 circemds1 kernel: Lustre: server umount circelfs-MDTffff 
complete

Why can't it load the MGS?  I don't see an entry for circelfs-MDTffff in 
the CONFIGS directory -- shouldn't there be one?


Thanks,
Chris