----- Original Message ----- From: "Noel Chiappa" <j...@mercury.lcs.mit.edu> To: <cctalk@classiccmp.org> Cc: <j...@mercury.lcs.mit.edu> Sent: Wednesday, September 07, 2016 1:18 PM Subject: Re: RK05 packs
> From: Paul Koning > > > Some IBM systems ... have a "2315" drive which is an RK05. > > Yeah, I think that was the original source of these packs. The Diablo 30/31 > drives (used on the RK11-C controller before the RK05 was created) were > designed to use 2315 packs. > > > From: Tony Duell > > > My intention was to put the hub on a spare spindle .. put the platter > > on, turn it round by hand and use a lever-type dial gauge to get > > minimum run-out. > > One of the people I buy PDP-11 parts from reports that he actually did this > (using the exact procedure you describe) BITD. Apparently there's some > multi-platter pack that has the same exact platter as the RK05 (2315) pack, > and he had some damaged RK05 packs, and moved platters from the bad > multi-platter pack to the RK05's. > > Noel ============================ FWIW Burroughs also used drives/platters like this with their small systems (B80 - B1800); ISTR that they were ~ 5MB but 32 SPT instead of 12 or 16; unfortunately I dumped all of mine long ago. http://www.ricomputermuseum.org/Home/equipment/burroughs-b800 m