# Proxmox and TrueNas Scale passthough LSI Card **URL:** \ **Category:** General\ **Created:** [December 16, 2023, 9:37pm UTC](https://forum.45homelab.com/t/proxmox-and-truenas-scale-passthough-lsi-card/860 "2023-12-16T21:37:05Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Goose](https://forum.45homelab.com/letter_avatar_proxy/v4/letter/g/5f9b8f/32.png) [@Goose](https://forum.45homelab.com/u/Goose)\ **Post date:** [December 16, 2023, 9:37pm UTC](https://forum.45homelab.com/t/proxmox-and-truenas-scale-passthough-lsi-card/860/1 "2023-12-16T21:37:05Z")
I have installed Proxmox, and want to pass through the Broadcom/LSI card to set up ZFS in TrueNAS. I have enabled IOMMU in grub with GRUB\_CMDLINE\_LINUX\_DEFAULT=“quiet intel\_iommu=on”. and added vfio vfio\_iommu\_type1 vfio\_pci vfio\_virqfd to /etc/modules. I am passing through all functions. I then spin up a VM and… the server restarts. I get a TASK ERROR: start failed: QEMU exited with code 1, VNC fails to load. I watched the Craft Computing video which helped me with a previous server to get video passthrough working, but it isnt working for this. Any help on what I am missing. My goal is the whole backplane to TrueNas for storage. Thanks ---
**Author:** ![Goose](https://forum.45homelab.com/letter_avatar_proxy/v4/letter/g/5f9b8f/32.png) [@Goose](https://forum.45homelab.com/u/Goose)\ **Post date:** [December 18, 2023, 9:56pm UTC](https://forum.45homelab.com/t/proxmox-and-truenas-scale-passthough-lsi-card/860/2 "2023-12-18T21:56:13Z")
Ok. I got truenas installed by using q35, uefi, and disabling secure boot for the installation media to work, and passing the broadcom card through and checking all functions I think I have the card passed through as it is showing in truenas, BUT no drives are showing. (I have 7 Seagate exos installed). Do I need to flash the card to it mode. I am using the hl15 full build. Thanks \*\* I have also verified iommu is enabled in proxmox and have the vfio and similar (all 4 enabled and verified working in modules) ---
**Author:** ![rymandle05](https://forum.45homelab.com/user_avatar/forum.45homelab.com/rymandle05/32/2424_2.png) [@rymandle05](https://forum.45homelab.com/u/rymandle05)\ **Post date:** [December 19, 2023, 1:27am UTC](https://forum.45homelab.com/t/proxmox-and-truenas-scale-passthough-lsi-card/860/3 "2023-12-19T01:27:27Z")
Hey @Goose! Just double checking, the drives were visible in proxmox before doing the work to pass through the HBA? Since you mentioned full build, can I assume you are trying to pass the onboard SAS3008 HBA connected to slots 1-9 through 1-15? Anything in dmesg of TrueNAS look suspicious? ---
**Author:** ![Goose](https://forum.45homelab.com/letter_avatar_proxy/v4/letter/g/5f9b8f/32.png) [@Goose](https://forum.45homelab.com/u/Goose)\ **Post date:** [December 19, 2023, 1:51am UTC](https://forum.45homelab.com/t/proxmox-and-truenas-scale-passthough-lsi-card/860/4 "2023-12-19T01:51:40Z")
So I think I may have figured this portion out. In case anyone else is trying to run TrueNas on Proxmox. DO the above to enable iommu I had to pass through the SATA controller and the Broadcom LSI device. I ran `ls -al /sys/block/sd* ` it showed my drives were hooked up to the ID of device they were connected to I then ran `lspci` to get the device name which I passed through. This is my first foray into TrueNAS and ZFS, I have set up a Proxmox 3 node cluster with Ceph. If I am giving out misinformation or setting myself up for a failure please someone correct me. I fix teeth by day and break computers by night. ---
**Author:** ![rymandle05](https://forum.45homelab.com/user_avatar/forum.45homelab.com/rymandle05/32/2424_2.png) [@rymandle05](https://forum.45homelab.com/u/rymandle05)\ **Post date:** [December 19, 2023, 2:16am UTC](https://forum.45homelab.com/t/proxmox-and-truenas-scale-passthough-lsi-card/860/5 "2023-12-19T02:16:37Z")
If it the both devices are in the same iommu group, I think you can add “pcie\_acs\_override=downstream,multifunction” parameters to GRUB\_CMDLINE\_LINUX\_DEFAULT to force devices into their own groups. No guarantees but won’t hurt to try either.