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[Linux-cluster] mounting problem on RHEL5

I have a four node cluster with four storage nodes as well. I created 4 volume groups vg1,vg2,vg3,vg4 from the storage nodes and used mkfs.gfs2 to make a gfs2 filesystem.  

# mkfs.gfs2 -t c1:gfs1 -p lock_dlm -j 4 -r 2048 -J 128 /dev/vg1/lv0

I repeated the above for each volume group. I then mounted vg1 in to /mnt1 of one of the cluster nodes as follows:
# mount -t gfs2 -o quota=off /dev/vg1/lv0 /mnt1

It succeeded in mounting. But, when I try to mount the next volume group, I get an error as follows:

#mount -t gfs2 -o quota=off /dev/vg4/lv0 /mnt4
/sbin/mount.gfs2: lock_dlm_join: gfs_controld join error: -22
/sbin/mount.gfs2: error mounting lockproto lock_dlm

What could be the reason behind it? Am I messing up something related to lock_dlm? Are my options to gfs2.mkfs right? Any help is appreciated.

The following gfs modules were loaded:

# lsmod | grep gfs
gfs2                  519988  2 lock_dlm
configfs               62236  2 dlm

John G

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