Oracle Solution for Error ora-19816

ORA-19816: WARNING: Files may exist in string that are not known to database.

What triggered the Error:

e of the following events caused this: *1. A database crash happened during file creation. *2. A backup control file was restored. *3. The control file was re-created. *4. DB_RECOVERY_FILE_DEST has previously been enabled and then disabled.

What should we do to fix it:

e RMAN command CATALOG RECOVERY AREA to re-catalog any such files. If the file header is corrupted, then delete those files using an OS utility. Do not use messages 19817; it is used for simulating lock failure Do not use messages 19818; it is used for space reclamation before backup Do not use messages 19819; it is used to disable clearing file name