Database Error Messages

Release
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  • 23ai
  • 21c
  • 19c
Updated
Jun 24, 2024

ORA-19816

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

Cause

One 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.

Action

Use RMAN command CATALOG RECOVERY AREA to re-catalog such files. If the file header is corrupt, then delete those files using an operating system utility.