And even more fragile if still spinning ... yeah, it would never occur to me to have anyone but trusted technical staff physically swapping hard disks around.

And even more fragile if still spinning ... yeah, it would never occur to me to have anyone but trusted technical staff physically swapping hard disks around. Whereas I think people, at least us older types who used VHS tapes especially, have an idea for how tough/fragile computer backup tapes are (maybe a little tougher than a VHS tape, but not enough to make a difference in how you handle it). (We'll ignore for the moment that I never trusted anyone but myself to run the backup system and mount and unmount tapes, with one exception. :-)