At each node, mount the GFS file systems. For more information about mounting a GFS file system, refer to Section 4.2, “Mounting a File System”.
mount -t gfs BlockDevice MountPoint
mount -t gfs -o acl BlockDevice MountPoint
The -o aclmount option allows manipulating file ACLs. If a file system is mounted without the -o acl mount option, users are allowed to view ACLs (with getfacl), but are not allowed to set them (with setfacl).
You can use init.d scripts included with Red Hat Cluster Suite to automate mounting and unmounting GFS file systems. For more information about init.d scripts, refer to Configuring and Managing a Red Hat Cluster.