Re: Cant mount xfs lvm. Experimental Features?

[Marko Weber|8000 <weber@xxxxxxxxxx>]

hi eric,


> Am 2015-08-25 20:18, schrieb Eric Sandeen:
> On 8/25/15 11:51 AM, Marko Weber|8000 wrote:
> > dave,
> >
> > Am 2015-08-25 13:54, schrieb Dave Chinner:
> > > On Tue, Aug 25, 2015 at 10:25:16AM +0200, Marko Weber|8000 wrote:
> > > > Hello List, Hello Dave...
> > > >
> > > >
> > > > i try to mount on my backup server an Lvm Partition and get errors
> > > > in stdout and log:
> > > >
> > > > /var/log/messages:
> > > >
> > > > Aug 25 10:20:31 backupserver kernel: XFS (dm-2): Version 5
> > > > superblock detected. This kernel has EXPERIMENTAL support enabled!
> > > > Aug 25 10:20:31 backupserver kernel: Use of these features in this
> > > > kernel is at your own risk!
> > > > Aug 25 10:20:31 backupserver kernel: XFS (dm-2): Superblock has
> > > > unknown read-only compatible features (0x1) enabled.
> > > > Aug 25 10:20:31 backupserver kernel: XFS (dm-2): Attempted to mount
> > > > read-only compatible filesystem read-write.
> > > > Aug 25 10:20:31 backupserver kernel: Filesystem can only be safely
> > > > mounted read only.
> > > > Aug 25 10:20:31 backupserver kernel: XFS (dm-2): SB validate failed
> > > > with error 22.
> > > You need to run the same version kernel on both servers. The primary
> > > has a more recent kernel and feature set than your older backup
> > > server is running.
> > >
> > > Cheers,
> > >
> > > Dave.
> > you was right.
> > There was new kernel built. /usr/src/linux pointed to new kernel 
> > source.
> > But machine was not rebooted. So kernel version before kernel built 
> > was loaded.
> > I rebooted machine.
> > i renoved logical volume
> > i created logical volume
> Hope it landed back in the same place!
>
> > i tried to mount it and get:
> >
> > Aug 25 18:43:15 backupserver kernel: md4: unknown partition table
> > Aug 25 18:43:15 backupserver syslog-ng[1417]: Internal error, 
> > alarm_set() called while an alarm is still active;
> > Aug 25 18:43:56 backupserver kernel: md4: unknown partition table
> > Aug 25 18:44:01 backupserver kernel: XFS (dm-2): Invalid superblock 
> > magic number
> > pvdisplay shows:
> >
> > # pvdisplay
> >   --- Physical volume ---
> >   PV Name               /dev/md4
> >   VG Name               VolGroup01
> >   PV Size               2.69 TiB / not usable 1.25 MiB
> >
> >
> > so what is XFS missing?
> what does blkid /dev/md4 say?
>
> It looks like you might have a storage problem, now, and xfs can't
> even find a proper magic number on that device.
smartcl says all is ok.
AND the othetr two lvm partitions get mounted well....

blkid output:

~ # blkid /dev/md4
/dev/md4: UUID="7LYlkp-33ro-qyal-yGkZ-pMwC-Ei1L-Viy4UJ" 
TYPE="LVM2_member"
marko




> -Eric
>
>
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