I've been using Parallels 10 for a few Windows programs since I got my retina iMac back in December. With the release of Windows 10, I decided to try bootcamp for the first time. After many attempts and trial and error on procedures (simply using Bootcamp Assistant did not work), I was able to get Windows 10 installed and running. My problem is that apparently, bootcamp does not recognize external thunderbolt drives. I knew I had to install bootcamp on the internal SSD, but was surprised to learn that I couldn't use my external RAID for storage under Windows. If I am wrong on that point and someone can tell me how to make that work, I'd love to hear it. However, that is not my main issue/concern. I made the Windows partition large enough that I can live with only using the internal SSD for storage of my Windows apps/files. However, my iMac will not even boot into Windows if the thunderbolt drive is connected. I can get to the boot choice screen, but after selecting Windows, I just get a black screen followed by a black screen with blinking cursor. If I want to run Windows, I have to actually shut off my computer and disconnect the thunderbolt drives and then turn on and boot into Windows. Has anyone else had a problem like this? If so, were you able to overcome it and be able to boot into Windows without disconnecting thunderbolt devices? Of course, if so, could you explain how you did it? Thanks.