service cman start
service clvmd start, if CLVM has been used to create clustered volumes
clvmd) or the High Availability Logical Volume Management agents (HA-LVM). If you are not able to use either the clvmd daemon or HA-LVM for operational reasons or because you do not have the correct entitlements, you must not use single-instance LVM on the shared disk as this may result in data corruption. If you have any concerns please contact your Red Hat service representative.
service gfs start, if you are using Red Hat GFS
service rgmanager start