[Lustre-discuss] external journal and udev problem

[Philippe Weill]

Hi
I  put the journal on LVM over multipath  for my OSTs


formating the OST was made with

mkfs.lustre -v  --reformat --fsname=datafs --ost  --mgsnode=10.0.0.1 
--mgsnode=10.0.0.2 --failover=10.0.0.3 --mkfsoptions="-E stride=64 -E 
stripe-width=9 -J device=LABEL=JNL_OST0_DATA -i 131072" /dev/mpath/ost0_data


and now I'm fighting against udev since external journal device
major and minor number seem to be hard coded in the file system

and change on reboot

[root at ciclad-io3 rules.d]# tune2fs -l /dev/mpath/ost0_data
tune2fs 1.40.7.sun3 (28-Feb-2008)
Filesystem volume name:   datafs-OST0000
Last mounted on:          <not available>
Filesystem UUID:          7507ef98-4475-4612-a24b-fb7b0712ea42
[...]
Journal UUID:             41f9f23d-b23b-4bec-b694-68bfca9d35c7
Journal device:           0xfd19
Default directory hash:   tea
Directory Hash Seed:      b2550fed-3ffe-4f13-ab8e-a5de49ef9fec

[root at ciclad-io3 rules.d]# ls -l /dev/mapper/JNL_SUMO1-jnl_ost0_data
brw-rw---- 1 root disk 253, 23 Aug 19 14:15 /dev/mapper/JNL_SUMO1-jnl_ost0_data

trying with tune2fs to change the device doesn't seem to work
or i don't used the good syntax

[root at ciclad-io3 rules.d]# tune2fs -J 
device=/dev/mapper/JNL_SUMO1-jnl_ost0_data /dev/mpath/ost0_data
tune2fs 1.40.7.sun3 (28-Feb-2008)
The filesystem already has a journal.


what solution could you propose to recover my filesystem

Thanks in advance
-- 
  Weill Philippe -  Administrateur Systeme et Reseaux
  CNRS Service Aeronomie - Universite Pierre et Marie Curie -