Which two statements are true about an image copy backup? (Choose two.)
A.
It may only be taken to disk.
B.
It will contain only the used blocks.
C.
It will contain all used and unused blocks.
D.
It can be performed on disk as well as on tape.
Which two statements are true about an image copy backup?
Which two statements are true about an image copy backup? (Choose two.)
A and C are correct:
http://docs.oracle.com/cd/E11882_01/backup.112/e10643/rcmsynta007.htm#CHDEHBEJ
Creates image copies (rather than backup sets).
An image copy is a byte-for-byte identical copy of the original file. You can create image copy backups of data files, data file copies, and archived redo log files. Image copy files can only exist on disk. When using incrementally updated backups, the level 0 incremental must be an image copy backup.
By default, BACKUP generates backup sets. You can change the default backup type for disk backups to image copies using the CONFIGURE DEVICE TYPE … BACKUP TYPE TO COPY command.
RMAN chooses a location for the copy according to the following rules, listed in order of precedence:
FORMAT specified on BACKUP command for the object being backed up
FORMAT specified for the BACKUP command
fileNameConversionSpec setting for BACKUP command
CONFIGURE CHANNEL integer … FORMAT
CONFIGURE CHANNEL DEVICE TYPE … FORMAT
Platform-specific default FORMAT (which includes a %U for generating a unique file name)
You can create and restore image copy backups with RMAN or use a native operating system command for copying files. When you use RMAN, copies are recorded in the RMAN repository and are more easily available for use in restore and recovery. Otherwise, you must use the CATALOG command to add the user-managed copies to the RMAN repository so that RMAN can use them.
You cannot make a copy of a backup set, although you can make an image copy of an image copy. To back up a backup set, use BACKUP BACKUPSET.