Solving ORA-01078 and LRM-00109 Errors in Oracle RAC Due to Incorrect ORACLE_SID
When managing an Oracle RAC environment, setting the correct ORACLE_SID is critical. Misconfiguration can prevent the instance from starting or connecting properly.
Problem Description
After checking the environment, the ORACLE_SID was set to RACD instead of the correct instance identifier:
[oracle@node2 ~]$ echo $ORACLE_SID
RACD
[oracle@node2 ...
Posted on Thu, 15 Oct 2026 16:27:45 +0000 by mitwess