Exam 1z0-083 topic 1 question 28 discussion

I think B D -> https://docs.oracle.com/cd/E18283_01/backup.112/e10642/rcmbckad.htm#i1006180

"You cannot back up from tape to tape or from tape to disk: only from disk to disk or disk to tape." https://docs.oracle.com/en/database/oracle/oracle-database/19/rcmrf/BACKUP.html#GUID-73642FF2-43C5-48B2-9969-99001C52EB50

B D -> You cannot back up from tape to tape or from tape to disk

B & D are correct

disk to disk, tape to tape BC

BACKUP COPIES command work tape to tape or disk to disk

Backups cannot be duplexed on tape/disk combination.

I think B D https://web.stanford.edu/dept/itss/docs/oracle/10gR2/backup.102/b14191/rcmconc1003.htm#:~:text=Backups%20of%20Backup%20Sets&text=Only%20backup%20sets%20that%20were,run%20BACKUP%20AS%20COPY%20BACKUPSET%20. Backups of Backup Sets The RMAN BACKUP BACKUPSET command backs up previously created backup sets. Only backup sets that were created on device type DISK can be backed up using RMAN. They can be backed up to any available device type.

B, D https://docs.oracle.com/cd/E18283_01/backup.112/e10642/rcmcncpt.htm#:~:text=The%20RMAN%20BACKUP%20BACKUPSET%20command,of%20the%20same%20backup%20set.

I think B, C are correct, at least according to the provided explaination from Oracle: If your local backup uses a disk channel and want to Duplex to Cloud, Cloud backup uses and SBT channel. The same backup can not be duplexed to mixed kind of channels, see below. Duplexing Backup Sets RMAN can duplex backups to either disk or tape, but cannot duplex backups to tape and disk simultaneously.

The RMAN BACKUP BACKUPSET command allows you to do both, 1) Disk backup set to TAPE, 2) Disk Backup set to DISK. B. non-duplexed backup set written to disk can be duplexed to disk by backing up the backup set that is already on disk. D. A non-duplexed backup set written to disk can be duplexed to tape by backing up the backup set that is already on disk

F option is not there in actual exam.