Update: Question and answer below also applies to Ubuntu 16.04
I have a computer with dual SSDs and Win (7) pre-installed on another disk. The pre-installation uses (U)EFI/GPT boot. I want to install Ubuntu 14.04 64-bit desktop on a RAID1 root partition on my SSDs and still be able to dual-boot my Win7 system. Is this possible?
This guide using the desktop installer did not work, probably because it (implicitly) assumes MBR booting. Neither did installing the server distribution, probably for the same reason.