Proxmox
UPDATE I had to learn it the hard way… Just don’t do what I did and get yourself an HBA controller right away!
Otherwise you will run into (performance) problems sooner or later.
I was in the situation to install Proxmox on a second hand HP DL380 Gen8 Server with a P420i RAID controller.
Since Proxmox supports installation to ZFS out of the box I wanted to make use of that.