TrueNas Scale guest restarts

karny

New Member
Jan 23, 2026
1
0
1
Hello,

I've encountered some problems that I need guidance with.

I've installed Proxmox VE 9.1.4 on DELL PowerEdge R720. I've flashed internal HBA with IT mode firmware, and forwarded entire HBA to the TrueNas guest. There I've setup RaidZ1 with 2x8TB drives because my 3rd drive had data on it. Then I've transfered that data over SMB to the ZFS pool (around 8TB of data), and then expanded the existing pool with that third drive. Expansion has completed sucessfully without any problems, and total available capaciti has increased. Then came the time to import data from my 10+ years old WdMyCloud 3TB drive.
I've mounted remote share with this command:
sudo mount -t cifs //10.30.31.10/Share /mnt/share -o username=myuser,password=mypass,vers=1.0,iocharset=utf8

and then attempted to use rsync to pull data from the old NAS:
sudo rsync -avh --progress /mnt/share /mnt/tank/oldshare

Result: almost instant TrueNAS reboot. Nothing in logs, no obvious reason on the guest found.

I've started digging a little deeper with the help of ChatGPT, and i came to the realization that host is resetting HBA:
[ 460.425866] vfio-pci 0000:02:00.0: resetting
[ 460.530241] vfio-pci 0000:02:00.0: reset done

At that moment TrueNAS guest restarts.

I've verified that SAS2308 is at latest available IT firmware.
I've also disovered that if I mount the remote share using diferent version, things are much more stable (i still had one crash while copying 3TB of data compared to instant crash when using vers=1.0)
sudo mount -t cifs //10.30.31.10/Share /mnt/share -o username=myuser,password=mypass,vers=2.0,iocharset=utf8

Now I don't know how to proceed. I need this to be stable, but it feels like a ticking timebomb. I want to be able to copy data to the NAS without worrying that I might crash it that way. I'd like to avoind putting TrueNAS directly on bare metal because i have some VMs that I'd rather handle through Proxmox.

What am I missing? Is there anything I can do to fix this?