[linux-lvm] mount reiserfs snapshot failed

[linux-lvm] mount reiserfs snapshot failed

[Markus Bartl]

Hi there.

Im using the original kernel 2.4.18 with the locking patch and the
lvm-patch applied. I use the lvm in Version 1.1rc1.
I got one harddisk with 4 partitions on it, 1 partition is Linux LVM.
The volume to backup is mounted on /home and has reiserfs. 

I made a shell-script to perform a test using snapshots.
Here is what it does (looped):
1) create snapshot
2) mount snapshot --> fails sometimes (35 loops, 6 fails)
3) backup snapshot
4) create file on original volume while backup is still running
5) unmount snapshot
6) remove snapshot

In some cases mounting the snapshot volume fails with error 32 (wrong fs
type or bad superblock).
Anybody got any idea???

Thanks for your help,
Markus

Re: [linux-lvm] mount reiserfs snapshot failed

[Joe Thornber]

On Thu, Apr 18, 2002 at 11:33:31AM +0200, Markus Bartl wrote:
> Hi there.
> 
> Im using the original kernel 2.4.18 with the locking patch and the
> lvm-patch applied. I use the lvm in Version 1.1rc1.
> I got one harddisk with 4 partitions on it, 1 partition is Linux LVM.
> The volume to backup is mounted on /home and has reiserfs. 
> 
> I made a shell-script to perform a test using snapshots.
> Here is what it does (looped):
> 1) create snapshot
> 2) mount snapshot --> fails sometimes (35 loops, 6 fails)
> 3) backup snapshot
> 4) create file on original volume while backup is still running
> 5) unmount snapshot
> 6) remove snapshot
> 
> In some cases mounting the snapshot volume fails with error 32 (wrong fs
> type or bad superblock).
> Anybody got any idea???

Do version 1.0.3 tools fail in the same way ?

- Joe

Re: [linux-lvm] mount reiserfs snapshot failed

[Markus Bartl]

Joe Thornber wrote:
> 
> On Thu, Apr 18, 2002 at 11:33:31AM +0200, Markus Bartl wrote:
> > Hi there.
> >
> > Im using the original kernel 2.4.18 with the locking patch and the
> > lvm-patch applied. I use the lvm in Version 1.1rc1.
> > I got one harddisk with 4 partitions on it, 1 partition is Linux LVM.
> > The volume to backup is mounted on /home and has reiserfs.
> >
> > I made a shell-script to perform a test using snapshots.
> > Here is what it does (looped):
> > 1) create snapshot
> > 2) mount snapshot --> fails sometimes (35 loops, 6 fails)
> > 3) backup snapshot
> > 4) create file on original volume while backup is still running
> > 5) unmount snapshot
> > 6) remove snapshot
> >
> > In some cases mounting the snapshot volume fails with error 32 (wrong fs
> > type or bad superblock).
> > Anybody got any idea???
> 
> Do version 1.0.3 tools fail in the same way ?
> 
> - Joe
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

Hi there.
I tried the 1.0.3 tools with the 1.1rc1 kernel module. The same problem
occured (not as much 
as with the 1.1rc1 tools though).
Im now going to build the 1.0.3 kernel module and try it that way.
Thanks.
-- 
MC-Lindinger GmbH
Markus Bartl
Wiesenweg 1
D-94099 Ruhstorf

Re: [linux-lvm] mount reiserfs snapshot failed

[Markus Bartl]

Joe Thornber wrote:
> 
> On Thu, Apr 18, 2002 at 11:33:31AM +0200, Markus Bartl wrote:
> > Hi there.
> >
> > Im using the original kernel 2.4.18 with the locking patch and the
> > lvm-patch applied. I use the lvm in Version 1.1rc1.
> > I got one harddisk with 4 partitions on it, 1 partition is Linux LVM.
> > The volume to backup is mounted on /home and has reiserfs.
> >
> > I made a shell-script to perform a test using snapshots.
> > Here is what it does (looped):
> > 1) create snapshot
> > 2) mount snapshot --> fails sometimes (35 loops, 6 fails)
> > 3) backup snapshot
> > 4) create file on original volume while backup is still running
> > 5) unmount snapshot
> > 6) remove snapshot
> >
> > In some cases mounting the snapshot volume fails with error 32 (wrong fs
> > type or bad superblock).
> > Anybody got any idea???
> 
> Do version 1.0.3 tools fail in the same way ?
> 
> - Joe
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html
Hi there.

I rebuilt the kernel with lvm 1.0.3 and used the 1.0.3 tools. The
problem is still there.
Anyone got any other idea???
Thanks!!!

Markus
-- 
MC-Lindinger GmbH
Markus Bartl
Wiesenweg 1
D-94099 Ruhstorf

Re: [linux-lvm] mount reiserfs snapshot failed

[Chris Mason]

On Thu, 2002-04-18 at 07:38, Markus Bartl wrote:

> I rebuilt the kernel with lvm 1.0.3 and used the 1.0.3 tools. The
> problem is still there.

Could you please send the script?

During snapshot testing, I run two loops in the background:

while(1) 
mount /dev/vg/lv1 /foo
touch /foo/foo
rm /foo/foo
umount /foo/foo
end

while(1)
create snapshot
mount snapshot
umount snapshot
remove snapshot
end

-chris

Re: [linux-lvm] mount reiserfs snapshot failed

[Xavier Montagutelli]

On Thu, 18 Apr 2002, Markus Bartl wrote:

> Joe Thornber wrote:
> >
> > On Thu, Apr 18, 2002 at 11:33:31AM +0200, Markus Bartl wrote:
> > > Hi there.
> > >
> > > Im using the original kernel 2.4.18 with the locking patch and the
> > > lvm-patch applied. I use the lvm in Version 1.1rc1.
> > > I got one harddisk with 4 partitions on it, 1 partition is Linux LVM.
> > > The volume to backup is mounted on /home and has reiserfs.
> > >
[..]
> > > In some cases mounting the snapshot volume fails with error 32 (wrong fs
> > > type or bad superblock).
> > > Anybody got any idea???

No idea, but for information, I have the same problem on a kernel 2.4.17 +
linux-2.4.11-VFS-lock.patch + patch reiserfs-quota, with LVM 1.0.2

> Im now going to build the 1.0.3 kernel module and try it that way.



[ Xavier Montagutelli          `""'                                   ]
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Re: [linux-lvm] mount reiserfs snapshot failed

[Wolfgang Weisselberg]

Hi, Joe!

Joe Thornber (joe@fib011235813.fsnet.co.uk) wrote 31 lines:

> On Thu, Apr 18, 2002 at 11:33:31AM +0200, Markus Bartl wrote:
> > Im using the original kernel 2.4.18 with the locking patch and the
> > lvm-patch applied. I use the lvm in Version 1.1rc1.

> > In some cases mounting the snapshot volume fails with error 32 (wrong fs
> > type or bad superblock).

> Do version 1.0.3 tools fail in the same way ?

I am running a similar configuration: 
Kernel 2.4.18-rc4 
    + LVM 1.0.3
    + linux-2.4.18-VFS-lock.patch
    + sched-O1-2.4.18-pre8-K3.patch
I use ext3, and the LVM 1.0.3-tools + LVM-1.0.3-pmove-patch 

Snapshots work.

I upgrade to 2.4.19-pre6, must merge the VFS-lock.patch by hand
and drop the sched-O1-* patch; and use the LVM 1.1rc1-Tools:

Snapshots get generated, but first some (depending on the
order of generation!), later all of them are unreadable (even
a simple cat fails complaining about that), so mount fails.

I decide this might be due to a bad merge on my side or a
kernel problem, so I downgrade to:

Kernel 2.4.18-rc4 
    + LVM 1.1rc1 
    + linux-2.4.18-VFS-lock.patch
    + sched-O1-2.4.18-pre8-K3.patch
LVM 1.1rc1-Tools.

Snapshots still unreadable.

I downgrade the Kernel to LVM 1.0.3:

Kernel 2.4.18-rc4 
    + LVM 1.0.3
    + linux-2.4.18-VFS-lock.patch
    + sched-O1-2.4.18-pre8-K3.patch
but still with LVM 1.1rc1-Tool

Snapshots still show the same problems as before.

Downgrading to LVM 1.0.3-tools on the running system:
everything works again.

-Wolfgang

Re: [linux-lvm] mount reiserfs snapshot failed

[Heinz J . Mauelshagen]

This could still be VM issues.

Have you tried top of CVS, which is in pre-release tests for LVM 1.1-rc2?

Regards,
Heinz    -- The LVM Guy --


On Thu, Apr 18, 2002 at 11:33:31AM +0200, Markus Bartl wrote:
> Hi there.
> 
> Im using the original kernel 2.4.18 with the locking patch and the
> lvm-patch applied. I use the lvm in Version 1.1rc1.
> I got one harddisk with 4 partitions on it, 1 partition is Linux LVM.
> The volume to backup is mounted on /home and has reiserfs. 
> 
> I made a shell-script to perform a test using snapshots.
> Here is what it does (looped):
> 1) create snapshot
> 2) mount snapshot --> fails sometimes (35 loops, 6 fails)
> 3) backup snapshot
> 4) create file on original volume while backup is still running
> 5) unmount snapshot
> 6) remove snapshot
> 
> In some cases mounting the snapshot volume fails with error 32 (wrong fs
> type or bad superblock).
> Anybody got any idea???
> 
> Thanks for your help,
> Markus
> 
> _______________________________________________
> linux-lvm mailing list
> linux-lvm@sistina.com
> http://lists.sistina.com/mailman/listinfo/linux-lvm
> read the LVM HOW-TO at http://www.sistina.com/lvm/Pages/howto.html

*** Software bugs are stupid.
    Nevertheless it needs not so stupid people to solve them ***

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Heinz Mauelshagen                                 Sistina Software Inc.
Senior Consultant/Developer                       Am Sonnenhang 11
                                                  56242 Marienrachdorf
                                                  Germany
Mauelshagen@Sistina.com                           +49 2626 141200
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