On Wed, 5 Jan 2005 11:21:34 -0500, "j.duprie"
wrote:

I can remember back in the day when dad was working for the feds at Apollo
(the moon shot days) when a huge washing machine sized disk "array" held the
contents of a small box of punch cards. One of the fun geek things to do was
to send it read/write commands timed such that it would walk accross the
floor.....

We had two 15" HP "discs." I traced down a few program
bugs by listening to the discs as the code executed.