OCP 1Z0 053 62

62.You want to convert your existing non-ASM files to ASM files for the database PROD. Which method 
or command would you use to accomplish this task? 
A. Data Pump Export and Import 
B. conventional export and import 
C. the CONVERT command of RMAN 
D. the BACKUP AS COPY. command of RMAN 
Answer: D

http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmcncpt.htm#BRADV89489

RMAN-Created Image Copies

To create image copies and have them recorded in the RMAN repository, you run the RMAN BACKUP AS COPY command. Alternatively, you can configure the default backup type for disk as image copies. A database server session is used to create the copy. The server session also performs actions such as validating the blocks in the file and recording the image copy in the RMAN repository.

As with backup pieces, FORMAT variables are used to specify the names of image copies. The default format %U, which was explained in "Filenames for Backup Pieces", is defined differently for image copies. The following example shows the name for data file 2 generated by %U:

/d1/oracle/work/orcva/RDBMS/datafile/o1_mf_sysaux_2qylngm3_.dbf

http://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsubcl010.htm#RCMRF90449

Example

Example 4-21 Specifying an ASM Disk Group

This example copies the database to ASM disk group DISK1:

BACKUP AS COPY DATABASE FORMAT '+DATAFILE';