Quite some time ago, I installed a Linux system on my moms laptop. And just recently I noticed I have installed and partitioned (with fdisk) a BIOS/MBR on a system, that already has UEFI.

The machine now has dual boot Windows 7 and Arch Linux and it seems to be working just fine. I wouldn't even have noticed, if I haven't checked dmesg and that there are some errors in it, then I finally checked the partition table...and got shocked (I really didn't expect that at the time, It was my first installation on a UEFI machine).

Did anyone had the same experience here? What are the consequences leaving this unfixed? And is there a way to fix this, without reinstalling everything?

  • How did you "install" BIOS/MBR on a GPT partition table without overwriting it? – sikerbela Apr 27 '15 at 10:05
  • @sikerbela I really have no idea, but I know I used fdisk (which I think is supposed to be used for partitioning MBR) without any warnings or errors, which I also find strange.. – Alko Apr 27 '15 at 10:10
  • Weird... man fdisk says it does not understand GPT. Now I am curious about what happens when you partition GPT with fdisk too. – sikerbela Apr 27 '15 at 10:19

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