I recently purchased a new hard drive for my system, I will give you a quick explanation of that
sda - Old 1TB drive, MBR, houses my Windows 7 install
sdb - New 2TB drive, GPT houses Ubuntu 12.10
Ubuntu installs to my new drive no problem, but I can't boot into Windows, I get a "EFI File Path not valid". I tried boot-repair, it says to make a 1MB partition on the drive to be able to fix.
I deleted the whole drive and changed the Ubuntu drive to MBR and tried to reinstall. It set it back to GPT, and I am finding the same problem.
Is what I am trying to do impossible? How can I get this functioning in dual boot, with each OS on it's own drive without having to erase my Windows 7? Is disabling UEFI boot going to fix it?