537.On the development database rac0, there are six raw devices: /dev/raw/raw1 through /dev/raw/raw6. /dev/raw/raw1 and /dev/raw/raw2 are 8GB each, and the rest are 6GB each. An existing disk group +DATA1, of NORMAL REDUNDANCY, uses /dev/raw/raw1 and /dev/raw/raw2. Which series of the following commands will drop one of the failure groups for +DATA1, create a new disk group +DATA2 using two of the remaining four raw devices, and then cancel the drop operation from +DATA1?
A.ALTER DISKGROUP DATA1 DROP DISK DATA1_0001; CREATE DISKGROUP DATA2 NORMAL REDUNDANCY FAILGROUP DATA1A DISK ,, /dev/raw/raw3 FAILGROUP DATA1B DISK ,,/dev/raw/raw4; ALTER DISKGROUP DATA1 UNDROP DISKS;
B.ALTER DISKGROUP DATA1 DROP DISK DATA1_0001; CREATE DISKGROUP DATA2 HIGH REDUNDANCY FAILGROUP DATA1A DISK '/dev/raw/raw3' FAILGROUP DATA1B DISK '/dev/raw/raw4;'ALTER DISKGROUP DATA1 UNDROP DISKS;
C.ALTER DISKGROUP DATA1 DROP DISK DATA1_0001;CREATE DISKGROUP DATA2 NORMAL REDUNDANCY FAILGROUP DATA1A DISK '/dev/raw/raw3' FAILGROUP DATA1B DISK '/dev/raw/raw4'; ALTER DISKGROUP DATA1 UNDROP DATA1_0001;
D.ALTER DISKGROUP DATA1 DROP DISK DATA1_0001 ADD DISK GROUP DATA2 NORMAL REDUNDANCY FAILGROUP DATA1A DISK '/dev/raw/raw3' FAILGROUP DATA1B DISK '/dev/raw/raw4'; ALTER DISKGROUP DATA1 UNDROP DISKS;
正确答案是A