多选题You want to perform an RMAN backup of database as a copy. Which two factors will you consider while performing the backup operation?（）AThe backup as copy can only be taken to diskBThe backup as copy can only be taken to tapeCBackup can be performed onl
题目
多选题
You want to perform an RMAN backup of database as a copy. Which two factors will you consider while performing the backup operation?（）
A
The backup as copy can only be taken to disk
B
The backup as copy can only be taken to tape
C
Backup can be performed only when the instance is shutdown
D
Backup will constitute all used and unused blocks in the database