Note : This is just an example for one of the disk
1) Present Raw disks
2) How to get scsi id
/lib/udev/scsi_id -g -u -d /dev/sda
3600224800cbc991b76c2a957f833fc66
3) Update /etc/udev/rules.d/99-asm.rules
KERNEL=="sd*",SUBSYSTEM=="block",ENV{DEVTYPE}=="disk",ENV{ID_SERIAL}=="3600224800cbc991b76c2a957f833fc66",SYMLINK+="asmdatadisk1",OWNER="grid",GROUP="asmadmin",MODE="0660"
###Below might not work for cloud DB's
#ACTION=="add|change", ENV{ID_SCSI_SERIAL}=="3600224800cbc991b76c2a957f833fc66", SYMLINK+="asmdatadisk1", OWNER="grid", GROUP="asmadmin", MODE="0660"
4) Reload udev rules without reboot
udevadm control --reload-rules && udevadm trigger
