Cause: The internal information in an online log file does not match the control file. Action: Restore correct file or reset logs.
Cause: The log is smaller than the space allocated in it. May be the result of a shutdown abort while it was being written by the archiver. Action: Get a complete version of this log and use it for recovery. There should either be an online version of it or a copy that was successfully…
Cause: The archived log supplied for recovery was generated after the log that is needed. Can not yet use the log for applying redo. Action: Find correct archived log.
Cause: Check of log file header at database open found that an online log appears to be an incorrectly restored backup. Action: Restore correct file or reset
Cause: An IO error occurred on the named online log. Action: Restore accessibility to file, or restore file from backup.
Cause: The snapshot control file was found to be nonexistent, corrupt, or unreadable during an invocation of cfileUseSnapshot. Action: Call cfileMakeAndUseSnapshot again (or for the first time).
Cause: The filename supplied as a parameter to the ALTER DATABASE BACKUP CONTROLFILE command or to cfileSetSnapshotName matches the name of a file that is currently part of the database. Action: Retry the operation with a different filename.