I hadn’t realised that matter was making such progress. I was about to start installing KNEX stuff at my home, which I would later integrate with Zigbee or the other stuff.

You need to share your setup then … :-) I wanted to set this up next.

I’ve been using OpenHab2 for several years now but it only collects data from a few esp sensors I built during covid. I need to get it updated and use it more seriously

So I created an ext4 256GB partition at install time hoping when logged in the GUI, I would get the option to create a ZFS partition on the free space of the NVMe. However. the free space is not showing up under disk and I don’t get the option to add another partition, whether ZFS or other. Any clues why this would be?

Ok, but I assume this means that I have to configure the new node from scratch, adding the storage, etc. Correct? So the steps would be:

a) build new node with spare Optiplex + 1 new NVMe and install Proxmox from scratch b) configure the new node and add to the cluster c) migrate the VM from old now to new node d) decomission old node but installing the 2nd NVMe and Proxmox from scratch e) add the second rebuilt node to the cluster again.

Did I get this right?

Yeah, but these little Optiplex machines only take one NVMe at a time I think. In your article it sounds like you have a tiny NVMe drive for Proxmox and an SSD (on the SATA port presumably) for the storage. Is this right? I think the Optiplex 5070 allows both NVMe and SSD at the same time, but not 100% sure.