I'm having trouble dual booting Fedora 22 with Windows 7.

I got Windows 7 installed as normal on /dev/sda. Then, I started to install Fedora on /dev/sdb via live DVD. I got my partitions organized and clicked "Done". I get the following error:
"No valid boot loader device found. See below for details. For a UEFI installation, you must include an EFI System Partition on a GTP-formatted disk, mounted at /boot/efi."

So, the 100MB MBR partition isn't accepted unless it were GPT, I suppose. What are my options here? Should I format the 100MB MBR partition and mount it to /boot/efi? At which point - will I lose windows?

What can I do?

TIA.

Most of the Linux installers (not just Anaconda) are a bit myopic. If they find UEFI, they assume (insist) on gpt. At least you have a second disk. Format the second disk as gpt - then create the EFI partition (note this is not BIOS_MBR partition) during the F22 install.
Should all work as expected after that. I have a similar system - Win7 on MBR, F22 (and other Linux) on gpt on a recent UEFI motherboard - and it all hangs together ok. You may have issues getting to Win7 though - I have to interrupt the boot and select the MBR disk to boot to get it to load - I gave up trying to get it in the UEFI boot list. Don't use it often.

Well, if that's the case, I may as well just tell the bios which drive to boot to?

I was hoping to avoid that.

You should be able to chainload it if you customise lilo. I use grub, and can't remember what issues I had.
Like I said, I don't use that Win7 often enough to worry about it.

Thanks for the feedback.

It's going to break my heart, but I'm going to try to reinstall Windows7 with a GPT instead of MBR boot partition. I didn't think it was possible, but then I finally found this thread: http://answers.microsoft.com/en-us/w...1-30bb9b21a0eb

Hopefully, this will work and is really the most logical fix anyway.

I have a OEM Win7 pro 64-bit - it will not install to gpt.
All the doco I could find at the time indicated this should work, but I did find one reference that it had to be a "genuine" M$oft Win7 Pro 64-bit. I gave up - good luck.

Ok, the install I'm using is Windows 7 Pro 64bit - happens to not be OEM but the regular store package. Comes with 32bit and 64bit disks. Got Win7 installed on a UEFI disk - even got Fedora installed, but the Grub2 install failed.

-=[EDIT]=-
So I got the Grub Repair disk booted to a uefi usb drive - and it tells me to enable the source repository that has grub2-efi. I ended up enabling all of the repositories and no dice.

I have no idea how to fix that issue. If I can get grub installed and working - this should work.


-=[EDITEDIT]=-
Of course it shouldn't work! WHY would it work? Nothing worked, so I just did a complete install on my linux drive - and I got the same EFI partition error! Obviously, this is a Fedora/Anaconda problem...



/thread.