Unable to unmount zfs NVME Dell Server

[Clericer]

Hey guys,
i run into an issue with Proxmox on a Dell Poweredge R6615.
I have 2x4TB Nvme Drives and 2x6TB Nvme Drives.
Hardware Raid is disabled.
I boot Proxmox and choose the 2x4TB Nvme as Raid 1 ZFS.
When i start the Installation i get the error Message Unable to umount zfs, it can't create the partitions.
I tryed the Versions: 8.0-2, 8.0-1, 7.4-1

I disabled uefi boot and set to normal boot but still the same Problem.

Does anyone know what to do, to get ZFS up and running on a non raid Dell Server with ZFS Software Raid with the 2x4TB NVME drives?

 

[mat.murdock]

Did you figure this out?

Mat

 

[Clericer]

I had to choose brtfs instead of zfs while installation.
I have no idea whats causing this issue but i have a bunch of those with proxmox.

 

[gfngfn256]

Maybe this is relevant https://forum.proxmox.com/threads/unable-to-unmount-zfs-after-installation.56144/post-258719

I solved this by going into my BIOS and removing all similarly named UEFI entries.

 

[mat.murdock]

Is everything else running ok on that server?

Mat

 

[Clericer]

Flawlessly, i couldn't see any differences in performance or safety. I tryed removing one of the hdds and it worked aswell.