[SOLVED] Proxmox does not see EFI Disk when Converting Server 2019 VM BIOS from Default to UEFI

WeakenedSoul

New Member
Jul 23, 2021
2
0
1
Hey guys, new to Proxmox and hoping to get some help. This VM has been running fine as a Plex and File server. I just got a GPU (Quadro P2200) and I am trying to setup GPU passthrough on my Server 2019 VM. Server is a Dell R730xd with 2680v3s which I know support this. All the documentation I have found has said to change the BIOS from Default (SeaBIOS) to OVMF (UEFI) and also change Machine to Q35. I have also create an EFI disk. When I do this the VM is no longer able to boot and just comes up to the EFI shell where I can access the Boot Manager etc. but if I go in to add a boot device or look at the current ones, the UEFI disk I created is not visible. On another note all my storage is ZFS (for Proxmox host and VMs). Am I missing something? Any advice would be appreciated!

Here is the current VM conf


agent: 1
balloon: 2048
bios: ovmf
boot: order=ide0;net0
cores: 8
cpu: host
efidisk0: local-zfs:vm-102-disk-0,size=1M
ide0: Storage:vm-102-disk-0,size=120G
machine: pc-q35-5.2
memory: 8192
name: Server2019
net0: virtio=7E:88:80:FA:7E: D3,bridge=vmbr0,firewall=1
numa: 0
onboot: 1
ostype: win10
scsihw: virtio-scsi-pci
smbios1: uuid=97508687-7993-438e-bf56-3b4b0f412ec0
sockets: 2
startup: order=2
usb0: host=1058:25fb,usb3=1
vmgenid: 6fe6bcb0-9ee4-463f-98a3-68fffcb97ced
 
Last edited:

WeakenedSoul

New Member
Jul 23, 2021
2
0
1
Update:

I ended up getting everything working. I had to use mbr2gpt to convert the system to GPT then deleted the System reserved partition and created a new efi partition, formatted and assigned it a drive letter using diskpart. After doing this I had to use bcdboot to copy the required EFI boot files from my windows directory to the new EFI partition (I had to use the /f /UEFI flag as this did not work the first time without it). After doing all this I still booted into the EFI shell but was then able to create a new boot option with the new EFI partition.
 
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