Script for Checking disk size on ASM

set lines 9999
col DISKNAME for a20
col DISKGROUP for a20
col PATH for a30
select a.name DiskGroup, b.disk_number Disk#, b.name DiskName, b.total_mb, b.free_mb, b.path,
b.header_status from v$asm_disk b, v$asm_diskgroup a where a.group_number (+) =b.group_number
order by b.group_number, b.disk_number, b.name