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

Erik Froese erik.froese at gmail.com
Fri Jan 15 12:45:28 PST 2010


Thanks Bernd.

>From the bug reports it looks like the OST is actually still mounted by
lustre, unbeknownst to Linux and VFS.
Is there a mechanism to unmount it or do I need to reboot?

Erik

On Fri, Jan 15, 2010 at 3:28 PM, Bernd Schubert
<bs_lists at aakef.fastmail.fm>wrote:

> 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
>
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