Which two are true about RMAN backups when using a media manager to write backups to tape when there are only two tape drives? (Choose two.)
A.SBT tape compression can be used even if no RMAN compression is configured. B.Any backup set written to the SBT device in this configuration can contain a maximum of two backup pieces. C.Any backup written to the SBT device in this configuration can contain a maximum of two backup sets. D.SBT tape compression and RMAN backup compression should be used in parallel. E.The SBT device should be configured to use PARALLELISM 2 to allow both tape drive to be used simultaneously.正确答案AE
