本文探讨了将数据库存储迁移到Automatic Storage Management (ASM)时遇到的问题，特别是关于为何FRA磁盘组最初拥有更多空闲空间的原因。通过分析选项A到D，最终确定正确答案并给出了解释。
QUESTION 67
View the Exhibit and examine the disk groups created at the time of migrating the database storage to
Automatic Storage Management (ASM).
Why does the FRA disk group initially have more freespace even though both DATA and FRA disk groups are
provided with the same size?
A. Because the FRA disk group will not support dynamic rebalancing
B. Because the FRA disk group is not configured to support mirroring
C. Because disks in the FRA disk group are not formatted at this stage
D. Because the FRA disk group will support only a single size of allocation unit
Answer: B
同644题：http://blog.youkuaiyun.com/rlhua/article/details/19175175
Explanation/Reference:
Section: Database Architecture & Resource Management, RAC, ASM
most logical guess
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