Cause: Failed to create a control file backup because concurrent control file backup operation was in progress. Action: Retry backup creation later.

Cause: Attempting to invoke cfileSetSnapshotName, cfileMakeAndUseSnapshot, or cfileUseSnapshot when the currently mounted control file is a backup control file. Action: Mount a current control file and retry the operation.

Cause: The system cannot access the archived redo log because it belongs to another database. Action: Specify the correct redo log file, then retry the operation.

Cause: The creation of the redo log file failed Action: Check: 1) there is enough storage space on the device 2) the name of the file is valid 3) the device is online 4) an IO error occurred Also, it is possible REUSE was specified on the command line and a file of the incorrect…

Cause: The redo log file and control file are out of sync because a non-current controle file was specified when the instance was started. Action: Retry the RECOVER command using the current control file, or retry the RECOVER command using the USING BACKUP CONTROLFILE clause.

Cause: The maximum number of redo log files has been exceeded. Action: Use the CREATE CONTROLFILE command with a larger value for MAXLOGFILES if the compatibility is lower than 10.2.0. Otherwise, allocate more storage space for the control file.

Cause: The database is in NOARCHIVELOG mode and a command to manually archive a log did not specify the log explicitly by sequence number, group number or filename. Action: Specify log by filename, by group number or by thread and sequence number.

Cause: The specified block size of the redo log is greater than the maximum block size for the operating system. Action: Create the redo log on a device with a smaller block size

Cause: A parallel recovery was requested when the parallel recovery option is not installed. Action: Delete the PARALLEL clause from the RECOVER command. Also, delete the RECOVERY_PARALLELISM parameter in the initialization file.

Cause: During media recovery, the name of an archived redo log file was requested, but no name was entered. Action: Mount the correct redo log file and enter its name when it is requested.