Tips for Oracle DBA
Oracle Database Administration, How To, Daily DBA jobs, Oracle Error Cause and Action
Oracle DBA, How To, Error, Cause and Action
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ORA-01158: database string already mounted
ORA-01158: database string already mounted
Cause:
Another instance has a database by this name mounted.
Action:
Find which instance is still running. Perhaps you have not lost the control files after all.
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