@dgerard Had to check if Guy Kawasaki was still their Chief Evangelist. Indeed, he is...
He was Apple's Software Evangelist in the 80s and published many books about it.

@dgerard All mines go "tik tik tik tik tik..." but nothing more...

@dgerard But was it recognized before, but unreadable?

@dgerard What kind of HD? I have at least 4, incl. 2 x 500GB, 1 x 1TB, that are not "seen" anymore by the system... as if the head was "locked" somehow...