I finally started from a debian 11 installation, without LVM in EXT4.
20GB for system in raid 1 (ext4) mdadm for /
A little swap...
and the rest in raid 1 madadm (ext4) for /var/lib/vz
Yes for the raid you have to copy the *.EFI file on the two VFAT partitions for the UEFI disks (Sda1 and...