Hi all, We have 2 node rac on Solaris 10 & oracle 10.2.0.3. Due to power problem the rac nodes got rebooted. Node 1 is not able join the cluster. Node 2 is active and Asm & db is up and running. I have done ocr check onthe both the nodes. It gives same output. cssd.log says "takeover aborted due to UNKNOWN nodes" Status of Oracle Cluster Registry is as follows : Version : 2 Total space (kbytes) : 511764 Used space (kbytes) : 5252 Available space (kbytes) : 506512 ID : 1475358475 Device/File Name : /dev/rdsk/c5t600A0B80002A2CE80000047A46A133BAd0s1 Device/File integrity check succeeded Device/File not configured Cluster registry integrity check succeeded The cssd.log from the bad node as follows [ CSSD]2009-11-14 18:00:47.601 [9] >TRACE: clssnmConnComplete: connected to node 2 (con 100822e90), state 3 birth 0, unique 1258196245/1258196245 prevConuni(0) [ CSSD]2009-11-14 18:00:48.080 [16] >TRACE: clssnmRcfgMgrThread: Connection complete [ CSSD]2009-11-14 18:00:48.080 [14] >TRACE: clssnmPollingThread: Connection complete [ CSSD]2009-11-14 18:00:48.080 [15] >TRACE: clssnmSendingThread: Connection complete [ CSSD]2009-11-14 18:00:55.150 [16] >TRACE: clssnmRcfgMgrThread: Local Join [ CSSD]2009-11-14 18:00:55.150 [16] >TRACE: clssnmLocalJoinEvent: set node(2) inactive [ CSSD]2009-11-14 18:00:55.150 [16] >WARNING: clssnmLocalJoinEvent: takeover aborted due to UNKNOWN nodes [ CSSD]2009-11-14 18:01:02.220 [16] >TRACE: clssnmRcfgMgrThread: Local Join [ CSSD]2009-11-14 18:01:02.220 [16] >TRACE: clssnmLocalJoinEvent: set node(2) inactive [ CSSD]2009-11-14 18:01:02.220 [16] >WARNING: clssnmLocalJoinEvent: takeover aborted due to UNKNOWN nodes [ CSSD]2009-11-14 18:01:09.280 [16] >TRACE: clssnmRcfgMgrThread: Local Join [ CSSD]2009-11-14 18:01:09.280 [16] >TRACE: clssnmLocalJoinEvent: set node(2) inactive Any pointers on this highly appreciated. Thanks Venkat