[Lustre-discuss] Lustre claims OST is mounted when it is not

[Bernd Schubert]

On Friday 15 January 2010, Erik Froese wrote:
> We had an OSS lockup and had to be reset. Heartbeat failed to mount one of
> the OSTs and unmounted all of its local OSTs.
> 
> I'm trying to run mount on one of the OSTs (ost08) but it claims its
>  mounted when it is not.
> 
> I have other OSTs mounted so I can't remove the driver right now. Any
>  ideas?
> 
> Redhat 5.3
> 
> [root at oss-0-0 ~]# uname -a
> Linux oss-0-0.local 2.6.18-128.7.1.el5_lustre.1.8.1.1 #1 SMP Tue Oct 6
> 05:48:57 MDT 2009 x86_64 x86_64 x86_64 GNU/Linux
> 
> [root at oss-0-0 ~]# mount | grep ost
> /dev/dsk/ost12 on /mnt/scratch/ost12 type lustre (rw)
> /dev/dsk/ost16 on /mnt/scratch/ost16 type lustre (rw)
> /dev/dsk/ost20 on /mnt/scratch/ost20 type lustre (rw)
> /dev/dsk/ost00 on /mnt/scratch/ost00 type lustre (rw)
> /dev/dsk/ost04 on /mnt/scratch/ost04 type lustre (rw)
> /dev/dsk/ost110 on /mnt/scratch/ost110 type lustre (rw)
> 
> [root at oss-0-0 ~]# umount -f /mnt/scratch/ost08
> umount2: Invalid argument
> umount: /mnt/scratch/ost08: not mounted
> 
> [root at oss-0-0 ~]# e2fsck -n /dev/dsk/ost08 | tee
> /state/partition1/e2fsck-n.ost08_`date '+%m.%d.%y-%H:%M:%S'`.log
> e2fsck 1.41.6.sun1 (30-May-2009)
> device /dev/sdj mounted by lustre per
> /proc/fs/lustre/obdfilter/scratch-OST0018/mntdev
> Warning!  /dev/dsk/ost08 is mounted.
> Warning: skipping journal recovery because doing a read-only filesystem
> check.

see here:

https://bugzilla.lustre.org/show_bug.cgi?id=19566
https://bugzilla.lustre.org/show_bug.cgi?id=21359

-- 
Bernd Schubert
DataDirect Networks