053-540

Which of the following ALTER DISKGROUP commands does not use V$ASM_OPERATION to record the status of the operation?
A. ADD DIRECTORY
B. DROP DISK
C. RESIZE DISK
D. REBALANCE
E. ADD FAILGROUP

　　The ADD DIRECTORY command is not likely to use V$ASM_OPERATION to track its progress,because this operation adds only a small amount of metadata-a directory object-to the disk group and takes a minimal amount of time to complete.The V$ASM_OPERATION view provides the status of long-running ASM operations.
　　V$ASM_OPERATION 是记录当前磁盘的操作信息。
　　B,C,D,E 都会涉及到磁盘的操作，只有 A 是涉及目录的操作，所以选 A