Check available space on ASM disk groups

column name format a24;

select name, free_mb, total_mb from v$asm_diskgroup;

Example:

NAME                        FREE_MB   TOTAL_MB
------------------------ ---------- ----------
DATA_EPBS02P                 726569     908162
DATA_IATM01P                  26768      34987
DONOTUSE                     664413     664753
FLASH_EPBS02P                229632     244909
FLASH_IATM01P                 33208      34987