I know, cause the "old" installation was on ext4.
But why dos BTRFS not work?
Can it be, that something from the updated VirtualBox is atm the problem?
I did not reboot after that update, so maybe something might be struck...
So it is a BTRFS problem...
I was not able to get a running VM if i used BTRFS for /home or /.
I always got "Device could not be mounted".
Is this a bug or just a problem of VirtualBox?
Thanks for your help.