Investigate how guestfs works with snapshotted disks
git grep XXX -- features/persistence.feature
The gist of the issue is how our use of guestfs in ‘
only the expected files are present on the persistence partition on USB drive ...’
actually works when used in scenarios where we use (internal) snapshots.
Our current usage of it works as intended, but it’s not clear why, which
isn’t very reassuring.