”
1. Boot Ubuntu from a Live CD or Live USB
2. Open a Terminal (Applications > Accessories > Terminal) and type sudo su
3. Type fdisk -l (note which device is your SATA drive)
4. Type dmraid -E -r /dev/sdX
(Replacing X with your actual device found in step 3)
5. Confirm that yes, you wish to remove the dmraid information
Return to the desktop and proceed to run the Ubuntu Installer
”
http://www.pendrivelinux.com/ubuntu-installer-cant-find-my-sata-drive/