The RMU Copy_Database command allows you to modify certain area
    parameters when the copy operation is performed. All the files
    are processed simultaneously during the copy operation. The copy
    operation's performance is similar to that of the RMU Backup
    command. The RMU Copy_Database command eliminates the need for
    intermediate storage media.

                                   NOTE

       You must perform a full and complete Oracle RMU backup
       operation immediately after the Copy_Database operation
       completes to ensure that the database can be properly
       restored after a database failure or corruption.

       Also note that if you do not specify either the After_
       Journal qualifier or the Aij_Options qualifier when you
       issue the RMU Copy_Database command, after-image journaling
       is disabled for the database copy and no .aij files are
       associated with the database copy.