（33）You want to perform the following operations for the DATA ASM disk group:

-Verify the consistency of the disk.

-Cross-check all the file extent maps and allocation tables for consistency. check whether the alias metadata directory and file directory are linked correctly.

-Check that ASM metadata directories do not have unreachable allocated blocks.

Which command accomplishes these tasks?

A. ALTER DISKGROUP data CHECK;

B. ALTER DISKGROUP data CHECK DISK;

C. ALTER DISKGROUP data CHECK FILE;

D. ALTER DISKGROUP data CHECK DISK IN FAILURE GROUP 1;

答案：（A）

解析：

参考ALTER DISKGROUP语句