[root@node1 ~]# gfs_mkfs -p lock_dlm -t cluster1:gfs1 -j2 /dev/hdb1
This will destroy any data on /dev/hdb1.

Are you sure you want to proceed? [y/n] y

Device:                    /dev/hdb1
Blocksize:                 4096
Filesystem Size:           2555688
Journals:                  2
Resource Groups:           40
Locking Protocol:          lock_dlm
Lock Table:                cluster1:gfs1

Syncing...
All Done
[root@node1 ~]# mkdir /gfs
[root@node1 ~]# mount /dev/hdb1 /gfs
[root@node1 ~]# df -hT
Filesystem    Type    Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
              ext3     19G  2.2G   16G  12% /
/dev/hda1     ext3     99M   12M   83M  13% /boot
tmpfs        tmpfs    125M     0  125M   0% /dev/shm
/dev/hdb1      gfs    9.8G   20K  9.8G   1% /gfs

-- dmesg

GFS 0.1.19-7.el5 (built Oct 10 2007 20:08:18) installed
Trying to join cluster "lock_dlm", "cluster1:gfs1"
Joined cluster. Now mounting FS...
GFS: fsid=cluster1:gfs1.0: jid=0: Trying to acquire journal lock...
GFS: fsid=cluster1:gfs1.0: jid=0: Looking at journal...
GFS: fsid=cluster1:gfs1.0: jid=0: Done
GFS: fsid=cluster1:gfs1.0: jid=1: Trying to acquire journal lock...
GFS: fsid=cluster1:gfs1.0: jid=1: Looking at journal...
GFS: fsid=cluster1:gfs1.0: jid=1: Done