well, OP already explained his needs…
he was used to have an option in SME’s console to manage raid arrays…
in NS there’s no such a feature, neither in (deprecated) console nor in the web GUI…
and this is awkward since almost has moved to web GUI…
in other words: there was a feature, now it’s not available anymore and a user has to dig into cli commands (again, awkward in NS perspective)…
normally an (usefull) feature should be pruned only if there’s a valid alternative… and this is not the case.