su - oracle
sqlplus / as sysdba
set lines 1000
set pages 5000
select * from v$asm_diskgroup order by group_number;
select * from v$asm_file
where group_number = 4
order by group_number,file_number;
select * from v$asm_alias
where group_number = 4
order by group_number,file_number;
ALTER DISKGROUP test ADD DIRECTORY '+test/testdir';
ALTER DISKGROUP test rename DIRECTORY '+test/testdir' to '+test/testdir2';
alter diskgroup test drop directory '+test/testdir2';