WIN 10 VM \Boot\BCD I/O error after unraid 6.10.1 update


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Hello everyone,

I'm having a bad experience right now.
My baremetal Win 10 Pro won't boot with Qemu after unraid 6.10.1 upgrade.
Win boot work correctely when I launch it directly from my NVME.
This is the error into VNC:

 

image.thumb.png.347bb710b8e802073a23883a7dc5281c.png

 

I hope someone can help me.

I've tried to create new template without success.
I've tried to delete the libvirt.img.
And I've already tried black Voodoo stuff like start/stop VM/server etc...
 

Windows 10 Qemu.txt

Edited by HerrGeneral
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1 hour ago, HerrGeneral said:

Are there less problems with UEFI install?

I would say no (or at least not so many advantages), efi is just more recent than legacy bios, but I would prefer ovmf uefi because most recent oses 'prefer' uefi.

This case is very particular, it's very strange that it boots bare metal and fails with that bcd error in a vm...

Edited by ghost82
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  • Solution
6 hours ago, HerrGeneral said:

I've tried ESC/ ctrl+alt+del/ F2 etc.. nothing change. No boot option. Is there a trick that I don't know?

I never used seabios, so I don't know, but it could be that you need to enable bootmenu and add a timeout to your xml.

Anyway, I'm seeing that the vm is using seabios 1.15: I compiled the latest version (1.16.0-4-gdc88f9b), maybe you can try this version (attached).

Extract file bios.bin from the zip and save it somewhere on unraid (i.e. /path/to/bios.bin).

Open the vm settings in xml view and change from:

  <os>
    <type arch='x86_64' machine='pc-i440fx-6.2'>hvm</type>
  </os>

 

to:

  <os>
    <type arch='x86_64' machine='pc-i440fx-6.2'>hvm</type>
    <loader type='rom'>/path/to/bios.bin</loader>
    <boot dev='hd'/>
    <bootmenu enable='yes' timeout='30000'/>
  </os>

 

Try to boot.

As you can see I enabled the bootmenu with a timeout of 30 seconds, so you should have enough time to see what boot options it proposes.

Seabios-1.16.0-4-gdc88f9b.zip

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