Hi Pavel, The whole clusterware stack is down, you should have a look at the Clusterware alert log in CRS_HOME/log/hostname/ for in indication of the failure. In the majority of these cases wrong permissions on the shared storage prevent Clusterware from starting. If this doesn't fix it, please attach the Clusterware log. Hth, Martin Martin Bach Oracle Certified Master 10g http://martincarstenbach.wordpress.com http://www.linkedin.com/in/martincarstenbach ----- Reply message ----- From: "Pavel Ermakov" <ocp.pauler@xxxxxxxxx> Date: Fri, Feb 18, 2011 17:26 Subject: Problem with starting CRS 11g on one of the node(RAC) To: "ORACLE-L" <oracle-l@xxxxxxxxxxxxx> Hi listers! I have 2 nodes RAC(11R1 CRS&ASM and 10.2.0.3 DB). RHEL 4. From saturday in alert.log: Sat Feb 12 00:17:39 2011 Starting control autobackup Sat Feb 12 00:33:22 2011 Control autobackup written to SBT_TAPE device comment 'API Version 2.0,MMS Version 5.4.1.0', media '55757' handle 'c-1215503348-20110212-01' Sat Feb 12 06:01:28 2011 Thread 1 advanced to log sequence 4975 Current log# 2 seq# 4975 mem# 0: +DATA/boss/redo02a.log Current log# 2 seq# 4975 mem# 1: +RECOVERY_AREA/boss/redo02b.log Sat Feb 12 13:00:03 2011 Thread 1 advanced to log sequence 4976 Current log# 1 seq# 4976 mem# 0: +DATA/boss/redo01a.log Current log# 1 seq# 4976 mem# 1: +RECOVERY_AREA/boss/redo01b.log Sat Feb 12 13:00:19 2011 Starting control autobackup Control autobackup written to DISK device handle '+RECOVERY_AREA/boss/autobackup/2011_02_12/s_742914019.422.742914021' Sat Feb 12 13:03:24 2011 Starting control autobackup Control autobackup written to SBT_TAPE device comment 'API Version 2.0,MMS Version 5.4.1.0', media '55757' handle 'c-1215503348-20110212-03' That's all. In crsd.log: 2010-09-05 23:42:36.861: [ CRSRES][141155232] Start of `ora.boss.boss_taf.boss2.srv` on member `hqora01n2srv` succeeded. 2010-09-05 23:42:37.637: [ CRSRES][132918176] Start of `ora.boss.boss_taf.cs` on member `hqora01n1srv` succeeded. 2010-10-17 19:44:51.879: [ COMMCRS][2778004384]clsc_receive: (0xa648e8a0) error 2 2010-11-03 08:29:01.428: [ COMMCRS][2778004384]clsc_receive: (0x9f000538) error 2 2010-11-12 05:55:32.789: [ COMMCRS][2778004384]clsc_receive: (0x9f000528) error 2 2011-01-30 16:27:49.749: [ COMMCRS][2778004384]clsc_receive: (0xa0600bc8) error 2 [root@srv cssd]# /u01/app/oracle/product/11.1.0/crs/bin/crsctl start crs Attempting to start Oracle Clusterware stack The CRS stack will be started shortly [root@srv cssd]# /u01/app/oracle/product/11.1.0/crs/bin/crsctl check crs Failure 1 contacting Cluster Synchronization Services daemon Cannot communicate with Cluster Ready Services Cannot communicate with Event Manager [root@srv cssd]# /u01/app/oracle/product/11.1.0/crs/bin/crs_stat -t CRS-0184: Cannot communicate with the CRS daemon. Can you suggest me, what could be the reason? Best regards, Pavel.