Goofy question about "industrial" archiving

Chuck Guzis asked: What was the smallest fixed-head drum memory ever constructed? Cheers, Chuck ----------------- Billy: The smallest I ever worked on was a little less than 1" in diameter and 3" long. It used fluid bearings and spun at a high RPM - I want to say 10K but think it might be a little less. The heads fit on a bar that rotated to bring them close to the drum once it was up to speed. The bar was spring loaded so it could unload the heads automatically in case of a power failure. The whole assembly was heavily shielded and shock protected. It was to fit in a fire control computer used by the Navy and Air Force. It's purpose was to reload the main computer memories in case of an EMP from a nuclear device. It really sticks in my mind because I later found out that the purchase price was in excess of $100K. Billy