When disabling CSM (Compatibility Support Module) Proxmox won't boot

[thierrybla]

Hi guys,

Nowadays I usually boot with CSM (Compatibility Support Module) on via Legacy mode.
However I would like to boot using UEFI mode so when I turn of CSM and boot it will throw me into initramfs and throw me an error.

The error is "Cannot import 'rpool' unsupported version or feature", "This pool uses the following feature(s) not supported by this system: com.delphix:log_spacemap"
I have no idea what this means and googling it doesn't really result in any obvious answers to me (or I just simply don't understand them).

Could someone help me out with this issue? Does this mean I need to do a clean install?

See attach files for a screenshot of the whole window I see in initramfs for more info.

Thanks in advance!

 

[t.lamprecht]

Hi,

The error is "Cannot import 'rpool' unsupported version or feature", "This pool uses the following feature(s) not supported by this system: com.delphix:log_spacemap"
I have no idea what this means and googling it doesn't really result in any obvious answers to me (or I just simply don't understand them).

It means that whatever initrd gets selected if you boot in EFI mode is probably generated from an older kernel that does not support the ZFS features in use. It loads the v0.8.5-pve1 version of the module, so could it be that you booted a kernel with ZFS 2.0.x and upgraded the root pool?

Could someone help me out with this issue? Does this mean I need to do a clean install?

Normally this should be repairable, as, if I read correctly, you can still boot when using CSM it would be a matter of generating + syncing a newer initrd to the EFI System Partition (ESP). Basically following this how-to:
https://pve.proxmox.com/wiki/ZFS:_Switch_Legacy-Boot_to_Proxmox_Boot_Tool

To talk specifics it would be first good to know a few things about your setup:

• What Proxmox VE Version are you currently updated too?
• What Proxmox VE Release did you used to install this host?
• Did you install the host in UEFI mode and then switched to using CSM?

 

[thierrybla]

Hey Lamprecht, Thanks for your help.

To answer your questions, Yes I upgraded the pool when ZFS 2.0 came out.
My Current update is 7.0 (latest).
I am not exactly sure what version I had when I installed it originally, but I assume that it was a year ago (using the latest at the time).
Also I'm unsure what mode I used to install proxmox, however I do vaguely remember that I tried to install with UEFI at first but something didn't work right with GPU passthrough which was fixed by switching to CSM (not using GPU passthrough anymore).

 

[t.lamprecht]

Ok, if you installed about a year ago you'd probably have used the Proxmox VE 6.2 ISO, that came out on 12th May 2020:
https://pve.proxmox.com/wiki/Roadmap#Proxmox_VE_6.2

So you should have a prepared EFI System Partition already setup, so you can boot into Proxmox VE and configure that to be automatically used as target for the initrd on kernel upgrades, see the how-to, it should be all there:
https://pve.proxmox.com/wiki/ZFS:_S...ox-boot-tool_from_a_Running_Proxmox_VE_System