Hi Ludo, On Wed, 09 Sep 2020 10:27:30 +0200 Ludovic Courtès wrote: > Why do we need all of ‘file-systems’ rather than just the state file > systems? It really depends on what one uses it for, but for me it's this use case: * I have an extra hard drive that contains things I want to serve via NFS (it has nothing to do with the root file system). * The extra hard drive has to be mounted when NFS service starts up, otherwise exportfs errors out: If I don't require "file-systems", even if that drive is listed in the operating-system's file-systems list, it won't be mounted in time. I ran into this problem when merging Stefan's new "nfs-root-fs" system test into gnu/tests/nfs.scm . Does this make sense or is it the wrong solution?