Which two statements are true about RMAN duplexed backups?
A.It is not supported for image copies. B.It is only supported for backups to tape via the media management interface. C.Duplex backups can be performed on either disk or media, but cannot be performed on media and disk simultaneously. D.Duplex backups can contain only data files and control files. E.For performing duplexed backups, the parallelism for the device must be set equal to the number of copies.正确答案AC
