Hello Andrew, Thank you so much for your response. Just so I am entirely clear on the bigger flow of events. In an active/passive corosync automatically starts pacemaker? This is working fine, I have loaded the configuration using crm configure... In an active/active we should start pacemaker before started cman which is in charge of starting corosync (that no longer starts pacemaker)? I think I made a mistake somwhere becasue when I attempt to start pacemaker manually, I get: Oct 31 12:00:17 astdrbd1 pacemakerd: [1190]: info: Invoked: pacemakerd Oct 31 12:00:17 astdrbd1 pacemakerd: [1190]: info: crm_log_init_worker: Changed active directory to /usr/var/lib/heartbeat/cores/root Oct 31 12:00:17 astdrbd1 pacemakerd: [1190]: info: get_cluster_type: Assuming a 'heartbeat' based cluster Oct 31 12:00:17 astdrbd1 pacemakerd: [1190]: CRIT: get_cluster_type: This installation of Pacemaker does not support the 'heartbeat' cluster infrastructure. Terminating. I do not have corosync installed not heartbeat. Just a note, I never configured anything to do with pacemaker when installing corosync. For the active/passive, I loaded the following configuration using crm configure -> load replace /root/config: node astdrbd1 \ attributes standby="off" node astdrbd2 \ attributes standby="off" primitive astIP ocf:heartbeat:IPaddr2 \ op monitor interval="60" timeout="20" \ params ip="192.168.2.6" cidr_netmask="24" \ nic="eth2" broadcast="192.168.2.255" \ lvs_support="true" primitive astDRBD ocf:linbit:drbd \ params drbd_resource="r0.res" \ op monitor role=Master interval="20" timeout="20"\ op monitor role=Slave interval="30" timeout="20" ms msAstDRBD astDRBD \ meta master-max="2" clone-max=2 interleave="true" \ notify="true" globally-unique="false" property $id="cib-bootstrap-options" \ no-quorum-policy="ignore" \ stonith-enabled="false" \ expected-quorum-votes="5" \ dc-version="1.1.6-9971ebba4494012a93c03b40a2c58ec0eb60f50c" \ cluster-recheck-interval="0" \ cluster-infrastructure="openais" rsc_defaults $id="rsc-options" \ resource-stickiness="100" And everything works fine. Now that I need the DLM, and Fence support for the active/active, I installed Cluster3. Your help is greatly appreciated. I should mention that everything is build from source. Thanks in Advance, Nick. _______________________________________________ discuss mailing list discuss@xxxxxxxxxxxx http://lists.corosync.org/mailman/listinfo/discuss