Just the other night I was looking at the way a Windows 10 install wrote the EFI partition to some random disk it was not installed on at all, and wishing for this, the GUI installer just does ridiculous shit and is really not up to par with even some no name Linux distro's Calamares. I have no idea why people buy this shit, it's Microsoft's luck that it comes preinstalled and most users never touch it
I found out that it did the same to me when I installed arch. Windows on one drive, EFI partition on a completely different one that has no reason to ever have an EFI partition.
Yeah, learnt that the hard way as well. "I'll install Windows on the new drive, copy over data from the old drive, then throw away the old drive - computer doesn't boot anymore because EFI boot partition randomly ended up on the old drive"
Since then, I always make sure to disconnect all drives except for the intended system drive when installing Windows.
I’ve had the Windows installer clobber the EFI partitions of Linux and macOS (hackintosh) installs on separate drives in the past, which is ridiculous. I now know to disconnect unrelated drives when installing Windows.
It cuts both ways. Most *nix installers will happily use the windows Efi partition and the only way to get it to use its own is to either deflag existing efi partitions or disconnect the drives
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