543.As the DBA, you run the following query on your ASM instance.
What is the implication of the results of the query? (Choose two.)
SQL> select group_number, name, state from v$ASM_DISKGROUP;
GROUP_NUMBER NAME STATE
0 DGROUP1 DISMOUNTED
2 DGROUP2 MOUNTED
3 DGROUP3 MOUNTED
A. The DGROUP1 disk group was unmounted by another DBA.
B. A datafile has been lost, causing the ASM disk group DGROUP1 to go into the DISMOUNTED state
C. One of the redundant disks (DGROUP1) hTMas been lost in a disk group.
D. This query has no meaning in an ASM instance.
E. A disk associated with a disk group was discovered after the ASM instance initially opened.
Answer: AE

作为一个DBA，你运行以下的ASM实例查询。查询结果的含义是什么？

A、由另一DBA卸载DGROUP1磁盘组
E、ASM实例最初打开后发现一个关联磁盘组的磁盘。

Apparently, for some reason DGROUP1 was not mounted when the ASM instance was started, or the disk was missing and then reappeared (hardware failure perhaps) after the ASM instance was started. ASM will discover new disks, even after the ASM instance is opened.
显然，出于某种原因，当ASM实例启动时磁盘组1未挂载或者在 ASM实例启动后磁盘丢失然后又出现了（也许是硬件故障）。 ASM会发现新的磁盘，即使在ASM实例打开之后。