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Re: Booting to UEFI from Bios Boot Partition

From: Andrey Borzenkov
Subject: Re: Booting to UEFI from Bios Boot Partition
Date: Sat, 28 Sep 2013 23:27:01 +0400

В Sat, 28 Sep 2013 13:23:53 -0300
luminair <address@hidden> пишет:

> Hi there!  I'd like to know if GRUB2 installed to BBP and booted in BIOS
> mode can then load a UEFI boot partition 

No, it is not possible. EFI binary requires EFI runtime and it is not
available after BIOS was loaded.

>                                          (in my case pointing to an install
> of Windows 8) on a GPT disk.  I ask because I'd like to boot a UEFI GPT
> disk in a Hyper-V gen1 VM which only supports BIOS mode booting.  GRUB2 (or
> another bootloader) may provide a workaround for me!
> I've tried to do this already with the version of GRUB2 that comes with the
> latest version of Ubuntu, but the chainloader throws an error when pointed
> at the UEFI boot partition.
> Thanks!

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