VirtioFS Support Page

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6 hours ago, Rodrigo Alves said:

I was able to configure the drive in windows 10, but when I copy a file I get an error saying "the file's properties cannot be copied". Can someone help me please?


Try running the "docker safe new perms" tool under the tools menu in unraid. Good place to start when you run into any permissions issues.

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On 11/27/2022 at 2:00 PM, johnsanc said:

Have there been any updates on the freeze issue several people are having whenever memoryBacking is enabled?

Can you confirm your memorybacking options? I was running with just memfd  and shared, but can you try including nosharepages also if you are not already?


    <source type='memfd'/>
    <access mode='shared'/>


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17 hours ago, TexasUnraid said:


Try running the "docker safe new perms" tool under the tools menu in unraid. Good place to start when you run into any permissions issues.

unfortunately it didn't work..


i'm struggling to get my Gdrive folder on that share, but gdrive doesn't accept mapped drives, figured this would be a great solution for me..

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It looks like this is still very unstable. Steam is unable to download games to the drive. I get disk write and read errors without being able to even start the download. I have checked permissions, run new permissions tool, run steam with admin privileges and so on. Steam logs dont say anything more either. Mounting the same share as a network drive works perfectly fine.


Running windows 11 Pro 22H2. Any further suggestions are welcome.

Edited by m33ts4k0z
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On 11/24/2022 at 6:48 PM, KptnKMan said:

I'm testing Virtiofs on my main Win11 VM, and having quite some success, but with a few caveats.


Firstly, while installing the latest virtio drivers, my VM IMMEDIATELY CRASHES.

I found through lots of trial and crashes that if I leave "Fwcfg" DISABLED, the install finishes.

Disabling it allows install of updated drivers, sets up services, and does not crash the VM.


What is this Fwcfg, can anyone shed some light on that?


Secondly, I'm trying to setup 2 virtiofs disks, but only 1 appears as the Z: drive

If I setup 2 drives, only the second appears as Z: when the VM boots.

In this example, I setup "vdata1" and "vdata2":



Thirdly, the virtiofs is always set as Z:

I cannot find or see any way to reassign the drive letter, or indeed use multiple drive letters.

Is there a way to change the assigned drive?


I have not tested but I have put a link to multi instance doc here 


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  • 3 weeks later...
4 hours ago, mackid1993 said:

So far my Win 11 VM has been up 7 hours and 30 minutes without crashing yet with the newest 229-1 drivers. Hopefully we finally have stability now.

Are you running windows? if so what version of winfsp are you running?

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14 hours ago, SimonF said:

Are you running windows? if so what version of winfsp are you running?

I'm running Windows 11. WinFsp is 2022.2 which was the latest version I could find. With the 229-1 drivers I managed over a day of uptime with no crashing so far. Before it would have completely locked up after about 10-12 hours.

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Discovered Something I thought I would share,


If you find that some EXEs will not run directly from a mounted share in Windows, in particular, EXEs that require Admin Rights to run. Make sure that the Windows Service "WebClient" is Running. If not set it to Automatic and Start it. This was the case for me on a Windows 11 VM. Milage May Vary!


Google-Fu, To The Rescue!
Error 0x800704b3 when launching application from HFS+ volume

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