create diskgroup DATA external redundancy disk '/dev/sdc';

create diskgroup FRA normal redundancy disk '/dev/sdd','/dev/sde';

drop diskgroup FRA;

drop diskgroup DATA; 

create diskgroup DATA normal redundancy disk '/dev/sdd','/dev/sdc'
attribute
'compatible.asm' = '11.2',
'compatible.rdbms' = '11.2';

create diskgroup FRA normal redundancy disk '/dev/sde','/dev/sdf'
attribute
'au_size' = '4M',
'compatible.asm' = '11.2',
'compatible.rdbms' = '11.2';

alter diskgroup FRA rebalance power 6;

select group_number, operation, state, power, sofar from v$ASM_OPERATION;

select group_number, operation, state, power, sofar from v$ASM_OPERATION;

alter diskgroup FRA rebalance power 1;

drop diskgroup DATA;

drop diskgroup FRA;