Installing UBUNTU without finding SATA HD

Installing UBUNTU without finding SATA HD
Reference from
http://www.pendrivelinux.com/ubuntu-installer-cant-find-my-sata-drive/

How I made Ubuntu Installer detect my SATA drive

Boot Ubuntu from a Live CD or Live USB
Open a Terminal (Applications > Accessories > Terminal) and type sudo su
Type fdisk -l (note which device is your SATA drive)
Type dmraid -E -r /dev/sdX
(Replacing X with your actual device found in step 3)
Confirm that yes, you wish to remove the dmraid information
Return to the desktop and proceed to run the Ubuntu Installer