Empty partition menu when installing 14.04

This was caused by two things. Sometimes, when using a DVD doesn't work, you should try booting with a USB instead, it is faster as well.

The second problem I had was that there was RAID metadata that resided on the hard drive. which was preventing Ubiquity from finding it.

So, to fix these problems:

• Boot from a live USB
• Select "Try Ubuntu without installing."
• Once booted, open up a terminal.
• Clear meta data with the following command: sudo dmraid -Er /dev/sda (If your hard drive isn't located at /dev/sda then replace that argument with the location of your hard drive. You can use gparted to figure this out)
• Type y when prompted to confirm.
• Proceed with your install!