Zane H. Healy wrote: I was surprised that it as not destroyed, given the Navy ID, but it is a ones pack, with no data, so maybe someone believed the label. Heaven knows with it being thru a scrapper, andnow my kitchen you'd be nuts to try to read it anyway. And the 300mb would barely hold a word document anyway :-) probably only fighter inventories anyway. The navy or marines usually had their accounting and ID stuff done at centers away from bases and shipped in already printed, so the computer of this age probably would not have been for that sort of crap anyway. The DPS-6's I had at ultimate had packs like this for 300mb drives, but I won't swear that is what this is for. the inspector came with a listing of the IBM packs and models, probably the CDC drives that honeywell or dec used would be near that, or only double density. I don't know of anything over 300 they did before going on to winchesters, and killing off the removable (don't recall a 600 for instance). Also it came with a cone like adapter for other packs, I didnt photograph, or if I did it was not mentioned in the photos. If anyone is interested in having something done with a pack they don't dare try with their own, let me know. I had to manually remove the pack cover on this one, I think because I may be missing a pin release adapter to push up far enough to release the cover on this model drive. I suspect that there may have been a system to prevent accidental swapping of packs on different spindles, but I never read or heard about it. I only worked on systems where there was one pack type around. I.E. T50 or T-300, or CDC 50's or CDC 300's and none of those interchanged, or were remotely interchangable. This pack is marked "master alignment pack" on the outside, but not on the pack inside, so it may be special, don't know. All the master alignment packs I ever saw from IBM, or 3M were marked on the pack's badges, not on hand written ones on the side. Jim