I am currently on rescuing my server. And since the case is a bit specific to me, I will keep it as short as possible. I have a C drive HDD 2TB and D drive SSD 1TB. And my Linux VM has one Virtual Disk stored on D.

So D became full, and I wanted to merge snapshots -> Merge failed.

Then I first copied all the disk files (main and children) to C and then after successfully copying to C i deleted them from D.

Now, just to check if the VM boots up, I wanted to adapt the virtual disk path to point to the moved disk files (In the C drive now). When trying to apply this an error occurs with a message that states that the disk is merging and cant be changed and i should wait.

Lastly I went into the VM settings again and clicked on the edit disk under that path and selected the merge option, now it merges.

But how is that possible?!? It didn’t let me change the path. And the path that is set right now doesn’t exist anymore because I moved all the files over to C. So, it did find the moved files, it seems…

Is this a Hyper-V feature I don’t know about?