Clusterware(CRS) not coming up:- 1. From root user check crs :- # crsctl check crs CRS-4638: Oracle High Availability Services is online CRS-4535: Cannot communicate with Cluster Ready Services CRS-4529: Cluster Synchronization Services is online CRS-4533: Event Manager is online 2. Try to stop and start it:- # crsctl stop crs CRS-2796: The command may not proceed when Cluster Ready Services is not running CRS-4687: Shutdown command has completed with errors. CRS-4000: Command Stop failed, or completed with errors. # crsctl check crs CRS-4638: Oracle High Availability Services is online CRS-4535: Cannot communicate with Cluster Ready Services CRS-4529: Cluster Synchronization Services is online CRS-4533: Event Manager is online # crsctl start crs CRS-4640: Oracle High Availability Services is already active CRS-4000: Command Start failed, or completed with errors. 3. Stop High availabilty service and crs resources:- crsctl stop res -init -all crsctl stop has Verify no crs processes should be running :- ps -ef|grep d.bin Note: Kill if any process is still running . 4. Now start crs :- crsctl start crs ASM instances and databases will also come up in current node. 5. If any ASM Disk group is dismounted then :- ALTER DISKGROUP <Disk_Group_Name> MOUNT;
