（617）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.

答案：（C）

解析：

由于创建磁盘组的时候是4块盘，每个阵列各两块盘，所以当磁盘组中controller1阵列损坏，那么存放在controller2中的原来跟controller1做镜像的数据转移到controller2的磁盘上做负载平衡。

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Oracle 11G OCP 1Z0-053 617