virtualbox.org

fth0 wrote:VirtualBox 6.1.0 provides a new UEFI BIOS implementation, so it would be interesting to try and run the VM on it ...

ChristopherSchultz wrote:As mentioned, switching from EFI -> BIOS won't allow the OS to start at all

You are right of course. If you are referring to my statement above, there is a misunderstanding: The EFI implementation changed between VirtualBox 6.0.x and 6.1.0. In the German language, the correct terms are BIOS (legacy BIOS) and UEFI BIOS (UEFI, EFI).

ChristopherSchultz wrote:The log contains these lines:
00:00:38.494636 AHCI#0: Reset the HBA
00:00:38.494667 VD#0: Cancelling all active requests

I'm assuming whatever those are points to what is wrong.

Those messages come as expected and I see them on all my VMs. The only unexpected part is the time stamp. Looking at the VirtualBox source code, a lot of (usually fast) things happen during the initialization of the virtual disk. It is possible that the access to the virtual disk or one of the .vmdk files is blocked inside the host OS ...