So I've just bought and installed an HP Proliant Microserver gen8 and upgraded it to 10GB RAM. I've installed FreeNAS onto a USB key (16GB) as recommended and FreeNAS is working well. Unfortunately, I didn't understand the limitations of FreeNAS at the time and I'm finding that it isn't for me and my situation.
To that end, what I'd like to do is install Ubuntu server onto the microserver and reuse the existing ZFS pools, rather than having to copy all of the data back off the drives as I've already been busy moving data for a good while now.
I have 4x3Tb drives split into 2 pools, each with a 3Tb mirror. I do have an SSD on order, so I'll be using that to store the OS. Can I reuse the drives as-is or am I facing the headache of wiping them and setting them up again? Any suggestions or info much appreciated.