I recently upgraded my desktop and had to do a clean install of Windows 10 on an SSD formatted as GPT. I have my old HDD still hooked up.
Here’s where it gets weird: I somehow managed to install Windows on the SSD with no EFI System partition being created in the process. *Everything works fine right now* (I’m on the machine now while posting this), but when I unplug the HDD – the only drive with an EFI system partition – the desktop doesn’t boot.
So the question is: what should I do now? Should I try cloning that partition over to my SSD? If so, can I just use Macrium Reflect and clone it to the end where my unallocated space is? (I’m aware I can use diskpart to create the EFI partition, but I’d rather just clone it if I can)
Or, should I just leave everything alone since it’s working – I just can’t remove the HDD or format it?
Diskpart list partition for my SSD is:
Part 1: MSR 16 MB, Offset 1024KB
Part 2: Primary 953 GB (I haven’t shrank this yet), Offset 17MB
Part 3: Recovery 517 MB, Offset 953 GB