Your disk config does not have a /boot/efi partition. So this can't be a UEFI machine.
P.S.: Your email looks very weird in my email client. Maybe because of the ``` in html. Can you please disable html mails? >>>>> On Wed, 10 Mar 2021 09:43:27 +0100, Rémy Dernat <remy...@gmail.com> said: > <div dir="ltr"><div>Hi,</div><div><br></div><div>I currently have that kind of disk configuration for my UEFI machines :</div><div><br></div><div>```</div><div>disk_config disk1 disklabel:msdos bootable:1 fstabkey:uuid<br><br>primary / 40G-200G ext4 rw,noatime,errors=remount-ro<br>logical /tmp 20G-50G ext4 rw,noatime,nosuid,nodev createo-- viele Grüße Thomas