Backup whole osmc system (not just kodi settings)/ Acess internal storage

is there a good thread that descriebs how to do this with a script?
the only thing i found is this one: [How to] Make periodic backups of whole OSMC system - #28 by grahamh. but it does not seem there is a good solution yet.
is it possible to rsync all the needed partitions while osmc is up and running or would certain ressources be busy while running osmc and kodi?

cheers bendsch