====== Check Oracle ASM Disk space ======

<code bash asm_space.sh>
#!/bin/sh
$ORACLE_HOME/bin/sqlplus -s / as sysasm <<EOF

SELECT NAME, STATE, ROUND(TOTAL_MB/1024, 2) TOTAL_GB,
       ROUND((TOTAL_MB - FREE_MB)/1024, 2) USED_GB,
       ROUND(FREE_MB/1024, 2) FREE_GB
FROM V\$ASM_DISKGROUP;

exit;
EOF
</code>

Output:
<code>
NAME                           STATE         TOTAL_GB    USED_GB    FREE_GB
------------------------------ ----------- ---------- ---------- ----------
DATADISK                       MOUNTED            800     348.14     451.86
</code>