36.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.
Answer: AD
答案解析：
参考：http://docs.oracle.com/cd/E11882_01/server.112/e18951/asm_util004.htm#OSTMG01644
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Relocates data in a range of physical blocks on a disk. |
remap
Marks a range of blocks as unusable on the disk and relocates any data allocated in that range.
remap diskgroup disk block_range
Table 12-45 lists the syntax options for the remap command.
Table 12-45 Options for the remap command
| Option | Description |
|---|---|
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Disk group name in which a disk must have data relocated. |
|
|
Name of the disk that must have data relocated. The name must match the |
|
|
Range of physical blocks to relocate in the format |
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.
The first example remaps blocks 5000 through 5999 for disk DATA_0001 in disk group DATA. The second example remaps blocks 6230 through 6339 for diskFRA_0002 in
disk group FRA
Example 12-49 Using the ASMCMD remap command