Ext3 users - Jan 2006 - EXT3: failed to claim external journal device.

We are having problems remounting an ext3 filesystem using an external 
journal device. The filesystem in question was working fine until the 
server was rebooted.
This is what we see on dmesg when trying to mount:
EXT3: failed to claim external journal device.
The external journal lives on a LVM2 logical volume and it seems to be 
accessible ( we can dumpe2fs and see filesystem information).

Here's the system information and command line used to create the 
filesystem :
SuSE SLES9 2 , kernel 2.6.5
ada718-5:/ # rpm -qa | grep e2fs
e2fsprogs-1.36-6.2
-----------------------------------------
mke2fs -O journal_dev   /dev/mapper/home_jou_vol_grp-home_jou 400000
mke2fs -E stride=16 -O sparse_super,dir_index -j -J 
device=/dev/mapper/home_jou_vol_grp-home_jou  /dev/mapper/home_vol_grp-home

Any ideas?

Thanks in advance,

-- 
Franco Bladilo
Linux/HPCC Administrator
Research Computing Support Group
Rice University
bladilo at rice.edu

On Jan 24, 2006  19:12 -0600, Franco M. Bladilo wrote:
> We are having problems remounting an ext3 filesystem using an external 
> journal device. The filesystem in question was working fine until the 
> server was rebooted.
> This is what we see on dmesg when trying to mount:
> EXT3: failed to claim external journal device.
> The external journal lives on a LVM2 logical volume and it seems to be 
> accessible ( we can dumpe2fs and see filesystem information).
> 
> Here's the system information and command line used to create the 
> filesystem :
> SuSE SLES9 2 , kernel 2.6.5
> ada718-5:/ # rpm -qa | grep e2fs
> e2fsprogs-1.36-6.2
> -----------------------------------------
> mke2fs -O journal_dev   /dev/mapper/home_jou_vol_grp-home_jou 400000
> mke2fs -E stride=16 -O sparse_super,dir_index -j -J 
> device=/dev/mapper/home_jou_vol_grp-home_jou  /dev/mapper/home_vol_grp-home
> 
> Any ideas?
I believe the kernel does the journal device lookup by the device major/minor,
and those are not fixed for LVM devices.  Bull recently posted a patch here
for mount to automatically find the correct block device for this journal
UUID.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.