Passthrough question

[jonathan2260]

Hello all.

I have a Proxmox server running from a s3p4000 server with 4 bays.
I have 4 disks. Two with 3TB and 2 with 1tb.
I had created a ZFS mirror with the two 1tb drives and created my images.
I then wanted to use the 3 TB drives to use TrueNAS and saw that I needed to set to enable the IOMMU using this link.

nano /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on"
update-grub

After rebooting the server my TrueNas can see the disks to create a mirror for the two 3TB drives.
Unfortunately my 1tb mirror now displays disk status unknown in the GUI.

I had to remove the intel_iommu=on option to get the mirror to be seen again but that means TrueNAS can't see the drives anymore.
How do I enable the iommu feature but still manage to have my 1tb mirror seen in Proxmox?

Thank you.

 

[sgtpepperaut]

how are you passing through your disks? via gui? via qemu add disk or via pci controller? ideally you want a hba controller in IT mode and just pass the entire thing to the VM so Proxmox doesnt do anything funky in between. This way you also get smart etc.

cheers

 

[jonathan2260]

Hi sgtpepperaut.

I was adding it using the GUI as you can see in the screenshot below.
I was following this video that explained how to set it up.

Do you have any links to help me understand how to setup a HBA controller as you suggest?

 

[jonathan2260]

You'll forgive me if my messages sounds like someone who doesn't know what he's talking about. At least I had no idea what an HBA controller when I responded earlier. There seems to be a built in one in this server. A Marvell 9172 controller. I'm not sure if that can be set to IT Mode (which I also just now looked up). I'm still however wrap my head around it.