.A database instance is using an Automatic Storage Management (ASM) instance, which has a disk
group, DGROUP1, created as follows:
SQL> CREATE DISKGROUP dgroup1 NORMAL REDUNDANCY
FAILGROUP controller1 DISK '/devices/diska1', '/devices/diska2' FAILGROUP controller2 DISK
'/devices/diskb1', '/devices/diskb2' ;
What happens when the whole CONTROLLER1 Failure group is damaged?
A. The transactions that use the disk group will halt.
B. The mirroring of allocation units occurs within the CONTROLLER2 failure group.
C. The data in the CONTROLLER1 failure group is shifted to the CONTROLLER2 failure group and
implicit rebalancing is triggered.
D. The ASM does not mirror any data and newly allocated primary allocation units (AU) are stored in the
CONTROLLER2 failure group.
Answer: C

一个数据库存储在一个自动存储管理(ASM)磁盘组，磁盘组，DGROUP1与SQL: SQL>create diskgroup dgroup1 normal redundancy failgroup controller1 disk ‘/devices/diska1’, ‘/devices/diska2’ failgroup controller2 disk ‘/devices/diskb1’, ‘/devices/diskb2’ 磁盘组中有足够的空闲空间可以进行镜像。如果CONTROLLER1故障组由于维护错误而不可用，会发生什么情况?E

A CONTROLLER1故障组中的数据被复制到controller2故障组，并开始重新平衡。

B 访问存储在DGROUP1中的任何表空间中包含的数据库对象的事务将失败，但查询将成功。

C 访问存储在DGROUP1中的任何表空间中的数据库对象的事务和查询将会失败。

D 分配单元的镜像将在CONTROLLER2故障组的ASM磁盘上执行，直到故障组的CONTROLLER1恢复联机。

E 在控制器故障组恢复联机之前，ASM不会镜像任何数据，并且新分配的主分配单元(AU)存储在controller2故障组中，没有镜像。