I am unable to start one instance of a two-node RAC cluster after a reboot. However, the instance on Node 2 is functioning correctly. The issue arose due to an abrupt crash, as both machines were powered off from my ODA boxes.

Symptoms

• Unable to start an node1 instance of a RAC (Real Application Cluster) cluster.
• Multiple errors are encountered during the startup process.
• Error message: “ORA-00205: error in identifying control file, check alert log for more info.”

Cause

The root cause of the issue is an incorrect permission setting for the binary files related to the Oracle database. The error stack indicates a control file identification error, which is often related to file permissions.

Solution

1. Change the permissions of the binary files as per the provided instructions:
   • Execute the following commands:
     • chmod 6751 $GRID_HOME/bin/oracle
     • chmod 6751 $RDBMS_HOME/bin/oracle
2. After modifying the permissions, attempt to start the instance again.

Similar Oracle KMs Found:

2316088.1 – RAC Database Can’t Start: ORA-01565, ORA-17503: ksfdopn:10 Failed to open file +DATA/BPBL/spfileBPBL.ora