Morning all

Running 7.2.1-rc.1 so maybe that's my problem? So I have docker properly installed and running. The containers I have all are running properly, and I am able to update those containers properly. I have pleanty of space available. I am able to install random others as a test, and they install properly...i.e. pia

However, when I try to install the vaultwarden server container, using either the default or alpine, I get this error:

Error: failed to register layer: Failed to create btrfs snapshot: invalid argument Weird

Just wondering if anyone else on here has an idea of what's up. I thought about posting this in the vaultwarden support section, but wasn't sure if this was something of theirs...Since it never fully installed I assumed it an unraid problem... I've attached the recent diagnostics

Thanks!

companion-diagnostics-20251118-1018.zip

Edited November 18, 2025Nov 18 by enesha

39 minutes ago, enesha said:

Running 7.2.1-rc.1 so maybe that's my problem?

Very unlikely.

I see that you are using a Docker folder. In my experience, those can have strange errors. I recommend recreating it as a Docker image and then retest:

https://docs.unraid.net/unraid-os/troubleshooting/common-issues/docker-troubleshooting/#re-creating-the-docker-image-file

Then:

https://docs.unraid.net/unraid-os/troubleshooting/common-issues/docker-troubleshooting/#reinstalling-docker-applications

Also see below if you have any custom docker networks:

https://docs.unraid.net/unraid-os/troubleshooting/common-issues/docker-troubleshooting/#restoring-docker-custom-networks

Hiya

Hrm, very interesting....My theory was that the folder would allow docker to use all available space. Ah well

Followed your instructions, and things worked out great. Thanks!