Hi, I would very much like to use Fangtooth on my NAS as I hope for better support for my Arc A310 and maybe even the poissibilty of passing my Ryzens iGPU to VMs. As I don’t want to be surprised I have created a virtual TrueNAS 24.10 installation on my Windows PC under Hyper-V with nested virtual…

that’s great to see! As I would’ve needed it after the very first shutdown of my very first VM I would’ve honestly expected this to be noticed after 25.04 BETA 1 at the latest though :sweat_smile: Probably bad luck on my end…

After fooling around in my Windows VM I gotta say it feels like performance has decreased a lot from 24.10. I assigned the VM 3 cores which are utilized 100% all the time according to task manager. The metrics on the TrueNAS GUI do not work but incus top reports CPU times of over 250. I have no id…

As my Windows VM now, after it was turned off for the night, didn’t boot up again (just hung at boot and then turned off - same as if I had enabled Secure Boot (which I did not)) I rolled back to 24.10.2.1 for now - I had not expected just how experimental Incus still is in TrueNAS. It’s still a sh…

Not sure if you tested this but are you able to mount and boot a Windows ISO in 25.04 because I have been unsuccessful as it always throws error (0) when uploading?

Yeah I see it works for some, but not for others. It does work on small ISOs around 2GB but crashes on larger ones around 5GB and can’t figure it out?

Does it always crash after uploading a certain amount? 4GB for example?

It always crashes on Wifi after about 2GB but I’ll have more time tomorrow to test more specifically. I did try ethernet cable tonight and the 5GB ISO got to 50% instead of the usual 10-15% and I’ve also been asking on Discord for other members experiencing the same issue, and it doesn’t seem to be …

Looks like we can manipulate the ISO from local storage instead of using upload incus config device add win11vm install disk source=/home/myusername/Downloads/Win11_23H2_English_x64v2.incus.iso boot.priority=10

[image] brentonv: I’ve even matched MTU across all connections and still no difference A matching MTU should always be set of course :sweat_smile:

Windows VM cannot boot/bad performance in Incus

Apps and Virtualization

brentonv April 18, 2025, 8:35am 24

I found the issue and you were correct, it wasn’t hardware related:

Topic		Replies	Views
Instance (Windows 10) inaccessible or running slow (25.04-RC.1) TrueNAS General SCALE	9	1257	March 28, 2025
[OUTDATED] GUIDE: How to install/migrate Windows VM to Fangtooth/Incus using Virtio drivers Apps and Virtualization SCALE , VM , Resource , Fangtooth , Incus	39	8502	January 3, 2026
25.04-RC1 - Cannot Get Windows To Work Apps and Virtualization SCALE , Incus	8	720	August 10, 2025
Fangtooth BETA (25.04): Big changes for VMs, don't get intentionality of experimental language Apps and Virtualization	37	2445	June 1, 2025
TrueNAS 25.04-BETA.1 is Now Available! Announcements	136	6212	March 20, 2025

Windows VM cannot boot/bad performance in Incus

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