ORA-01618: redo thread string is not enabled - cannot mount
Cause: The INIT.ORA parameter "thread" requests a thread that is not enabled. A thread must be enabled before it can be mounted.
Action: Shutdown the instance, change the INIT.ORA parameter and startup mounting a different thread. If the database is open in another instance then the thread may be enabled.
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ORA-01618redo thread string is not enabled - cannot mount