532.As DBA for the Rebel Alliance you have decided that you need to facilitate some redundancy in
your database. Using ASM, you want to create a disk group that will provide for the greatest
amount of redundancy for your ASM data (you do not have advanced SAN mirroring technology
available to you, unfortunately).
Which of the following commands would create a disk group that would offer the maximum in data
redundancy?
A. CREATE DISKGROUP dg_alliance1 NORMAL REDUNDANCY
    failgroup diskcontrol1 DISK 'c:\oracle\asm_disk\_file_disk3' NAME file_ diska1
    failgroup diskcontrol2 DISK 'c:\oracle\asm_disk\_file_disk4' NAME file_ diskb1;
B. CREATE DISKGROUP dg_alliance1 EXTERNAL REDUNDANCY
    failgroup diskcontrol1 DISK 'c:\oracle\asm_disk\_file_disk3' NAME file_ diska1;
C. CREATE DISKGROUP dg_alliance1 HIGH REDUNDANCY
    failgroup diskcontrol1 DISK 'c:\oracle\asm_disk\_file_disk1' NAME file_ disk1
    failgroup diskcontrol2 DISK 'c:\oracle\asm_disk\_file_disk2' NAME file_ disk2
    failgroup diskcontrol2 DISK 'c:\oracle\asm_disk\_file_disk3' NAME file_ disk3;
D. CREATE DISKGROUP dg_alliance1 MAXIMUM REDUNDANCY
    failgroup diskcontrol1 DISK 'c:\oracle\asm_disk\_file_disk1' NAME file_ disk1
    failgroup diskcontrol2 DISK 'c:\oracle\asm_disk\_file_disk2' NAME file_ disk2
    failgroup diskcontrol2 DISK 'c:\oracle\asm_disk\_file_disk3' NAME file_ disk3
    failgroup diskcontrol2 DISK First Test, 'c:\oracle\asm_disk\_file_disk4' NAME file_ disk4;
E. None of the above
Answer: C

题意是创建最高冗余磁盘组。