Hit the following problem: After a manual install of a database the database and its instances were not registered with the CRS. Using srvctl I registered the database and its instances in the CRS. Unfortunately I could not start the database or and instance. Well I could start one instance but none of the other three. Same thing happened when I used another instance (start inst1 but not inst2, inst3 and inst4, then start inst4, but not inst1, inst2, inst3). Then I tried to start one of the other instances manually. See what happened: SQL> startup ORACLE instance started. Total System Global Area 838860800 bytes Fixed Size 2074992 bytes Variable Size 218105488 bytes Database Buffers 612368384 bytes Redo Buffers 6311936 bytes ORA-01102: cannot mount database in EXCLUSIVE mode I found out that the culprit was an nice combination of init parameters. CLUSTER_DATABASE_INSTANCES=4 CLUSTER_DATABASE=NO So my explanation was that the data...
Some of the stuff I do for a living. This mainly concerns working with Oracle Databases and Application Servers. Lately I picked up AWS, Azure and OCI.