单选题You configured the default backup device type as disk for RMAN backups. In your database,because of business requirements,you have to take a simultaneous duplicate backup of the data files when the RMAN BACKUP command is used.  What must you set using the RMAN CONFIGURE command to achieve this?()A MAXSETSIZE TO 2B DEVICE TYPE DISK PARALLELISM 2C RETENTION POLICY TO REDUNDANCY 2D DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2

单选题
You configured the default backup device type as disk for RMAN backups. In your database,because of business requirements,you have to take a simultaneous duplicate backup of the data files when the RMAN BACKUP command is used.  What must you set using the RMAN CONFIGURE command to achieve this?()
A

 MAXSETSIZE TO 2

B

 DEVICE TYPE DISK PARALLELISM 2

C

 RETENTION POLICY TO REDUNDANCY 2

D

 DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2


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