mirror that now easily accessible Numero Uno disk?
(Pity that something as utterly automatic and maintenance-free as Time Machine seems not to have landed on any *nix short-ToDo-list (unless I missed that.)

Anyway yesss, it's nice when you score this easily: and, the room enviro re heat etc. may be kinder to that irreplaceable HD
--than lodging inside such a cramped-by-design space, no?