Backup Limitations

The following table contains a list of backup limitations:

Do not duplicate the Catalog database SID or share it with any other SID name.
This is not supported by Oracle RMAN, and there is no way to pre-determine how much data RMAN will back up.
The master job (the one submitted through the Backup Manager) does not show any progress except for the PARAMETER_FILES if they are included in the backup. Opening the monitoring window will not show any progress of the master job, even if sub-jobs are in progress. However, it will show when the master job is complete. Opening the monitoring window of a sub-job will show its progress, but it does not include the progress of other sub-jobs.
If the backup job is submitted from Oracle RMAN command line, the job cannot be rescheduled. That is, when you right-click the job option Ready/Hold/Run Now/Modify/Reschedule will be grey in the job queue option.