Which two statements are true regarding the functionality of the remap command in ASMCMD? (Choose two.)
A.
It repairs blocks that have read disk I/O errors.
B.
It checks whether the alias metadata directory and the file directory are linked correctly.
C.
It repairs blocks by always reading them from the mirror copy and writing them to the original location.
D.
It reads the blocks from a good copy of an ASM mirror and rewrites them to an alternate location on disk if
the blocks on the original location cannot be read properly.
Explanation:
Reference from the Oracle document release v11.1 at here:
Repairs a range of physical blocks on a disk. The remap command only repairs blocks that have read disk I/O
errors. It does not repair blocks that contain corrupted contents, whether or not those blocks can be read. The
command assumes a physical block size of 512 bytes and supports all allocation unit sizes (1 to 64 MB).
Reference from the Oracle document release v11.2 at here:
The remap command marks a range of blocks as unusable on the disk and relocates any data allocated in that
range.