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.
Something is wrong with this question because remap does not repair any block only relocates them.
“The remap command only relocates blocks. It does not correct or repair blocks that contain corrupted contents. The command uses a physical block size based on the SECTOR_SIZE disk group attribute.”
http://docs.oracle.com/cd/E11882_01/server.112/e18951/asm_util004.htm#CIHBAFAG
However I found the following:
* remap
Purpose
Marks a range of blocks as unusable on the disk and relocates any data allocated in that range.
* remap Command
The remap command only relocates blocks. It does not correct or repair blocks that contain
corrupted contents. The command uses a physical block size based on the SECTOR_SIZE disk
group attribute.
Purpose
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).
It changes between 11.1 and 11.2 versions:
11.1: http://docs.oracle.com/cd/B28359_01/server.111/b31107/asm_util.htm#OSTMG94306
11.2: http://docs.oracle.com/cd/E11882_01/server.112/e18951/asm_util004.htm#OSTMG94622
A and D is OK. You must read the new Documentation Oracle version