In reply to @sandro:supersandro.de
https://github.com/nix-community/disko/issues/1102

Hi folks, I've been having some stuttering success with using Disko for the first time. I have a setup where I wish to test the configuration in a VM locally. I got a LUKS+Btrfs setup working great. Then, I tried to adapt it based on the LUKS+Btrfs+RAID1 example and ran into a problem.

Before I file a more detailed issue on Github, I was wondering if anyone had seen this error before and knew what I might be missing?

+ mount /dev/mapper/p2 /tmp/tmp.199fvLzrll -o subvol=/
[   36.047665] BTRFS error (device dm-1): devid 2 uuid 25b46a4d-be57-4e52-b025-c1e603233b60 is missing
[   36.048657] BTRFS error (device dm-1): failed to read the system array: -2
[   36.050159] BTRFS error (device dm-1): open_ctree failed: -2
mount: /tmp/tmp.199fvLzrll: fsconfig() failed: No such file or directory.
       dmesg(1) may have more information after failed mount system call.

This is using the Disko example almost verbatim (the one found here: https://github.com/nix-community/disko/blob/master/example/luks-btrfs-raid.nix). The only adaptation is that I removed the settings.keyFile.