TrueNas on Proxmox with massive amount of Storage. Feasible?

evensure

New Member
Dec 16, 2024
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Hello everyone, I am relatively new to homelabbing but have never yet used Proxmox.
Though, I've always been tinkering with IT stuff and am also working in the field.

Finally, I want to realize my own homelab/NAS combo. My plan is to use Proxmox VE as a host and virtualize TrueNas Scale.
I'd be glad for a little advice :)

Now I know that that the typical way to achieve this would either be to passthrough the entire controller or passthrough an HBA instead.

I am currently eying the Supermicro X12SPO-NTF, even though it only has 1 PCI slot.
As far as I understand I'd be able to passthrough the Intel® C621A controller directly to TrueNAS, so that I'd be able to attach up to 10 SATA3 HDDs in my NAS.

That would leave me with the following:
  • 2 slots for M.2 2280/22110 SSDs
  • 2 SATA 3.0 Ports with SATA DOM Power (I'm not sure what purpose they fulfill and what to do with those. Can they act as an ordinary SATA, or only simulate HDDs?
  • 1 open PCI slot. Maybe there'll be need for a GPU in the future?
  • The main caveat however are the 5 PCIe 4.0 NVMe x8 Internal Ports that I could connect to this slimSAS cables (CBL-SAST-0827) each supporting 8 SATAs (40 possible... maybe a little too oversized?
Let's jump to my questions:
  1. Would that be doable?
  2. Where is it best to install Proxmox on
  3. Where should my VM's be stored and on which mediums.
I would like to hear what you think of my plan :)