I was told that at the old DEC plant in Maynard, they got a lot of HDA crashes about the same time of day. They finally figured out that a delivery was made at that time every day, and the truck would back up to the loading dock and bump it. The old wooden building would shiver, and the HDAs would crash. The fix was to turn the disk packs 90 degrees: these were *vertically* spinning, so doing that meant the head might skip to the wrong track (which apparently would be handled) rather than crashing into the platters.
I think I have those details right...at least how I heard it! -- zMan -- "I've got a mainframe and I'm not afraid to use it" ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
