I recently put together an unraid server in a lenovo RD450X 2u server, and I can't for the life of my make VM's work properly. I've tried Ubuntu, Arch, Mubuntu, and linux Mint and they all do more or less the same thing.
I provision the VM, give it about 8 cores and 8gigs of RAM, (I have 32 and 32GB total ) then assign a disk with the install ISO, setup drive space, and leave the rest deftault. The VM will boot, show a terminal UI and let me select an option and linux mint actually let me get into the OS and about 2 minutes into the install process before it just crapped out all together. Then the VM's all freeze completely and go unresponsive, have to force them to shutdown. Rinse and repeat. All in all, the VM's all run for a few minutes before just plain crapping out.
hardware:
Model: Custom
M/B: Inventec B800G3-N Version SB20J64741
BIOS: American Megatrends Inc. Version A1.11. Dated: 04/09/2016
CPU: Intel® Xeon® CPU E5-2630 v3 @ 2.40GHz
HVM: Enabled
IOMMU: Enabled
Cache: 512 KiB, 2 MB, 20 MB, 512 KiB, 2 MB, 20 MB
Memory: 32 GiB Other Multi-bit ECC (max. installable capacity 1024 GiB)
Network: bond0: fault-tolerance (active-backup), mtu 1500
eth0: 100 Mbps, full duplex, mtu 1500
eth1: interface down
eth2: interface down
Kernel: Linux 5.10.28-Unraid x86_64