053-528

What is the default AU size of an ASM disk group? What is the maximum AU size in an ASM disk group?
A. 100KB default, 10TB maximum
B. 256KB default, 1024MB maximum
C. 10MB default, 126PB maximum
D. 64KB default, 1EB maximum
E. 1MB default, 64MB maximum

　　The default AU size is 1MB,and 64MB is the maximum AU size for a disk group.
　　Determine an allocation unit size. Every Oracle ASM disk is divided into allocation units (AU). An allocation unit is the fundamental unit of allocation within a disk group. You can select the AU Size value from 1, 2, 4, 8, 16, 32 or 64 MB, depending on the specific disk group compatibility level. The default value is set to 1 MB.

注:AU即Allocation units 附上说明链接 http://www.eygle.com/archives/2009/08/oracle_asmauall.html