[root@Warcold /home/ut/tools]# sysctl vfs.usermount
vfs.usermount: 0
[root@Warcold /home/ut/tools]# mount -t cd9660 /dev/md1 /home/ut/
mount_cd9660: /dev/md1: Invalid argument
[root@Warcold /home/ut/tools]#