Track Sizes etc. (was Re: IBM 4331 (was Re: FPGAs))

Not sure of the disk drives 100%, but the numbers 7294, 13030 and 19069 ring bells for me as track sizes - I am guessing for the 2314, 3330 and 3350, respectively. (And a quick check on Google after I wrote the previous sentence adds support for that guess). Though I was still involved in mainframe from time to time after 1989, my exposure diminished after that. I fondly remember one time needing to plug in some channel cables for a new Intel/Jupiter TCP/IP interface into a System 390 right around 1989. Intel/Jupiter wouldn't do it without a bunch of money to fly someone in, and IBM wouldn't do it, period. Fortunately the IBM SE (who had also been involved in preparing IBM's bid for that contract -- and lost) came over to me, and knowing my pretty extensive hardware/electronics background told me that the FE's were going to have to quiesce the system for 15 minutes that very afternoon (I think for microcode patches) and if I knew how, then maybe it could be done then (wink wink), and said something about making sure I didn't strip the screw by first rotating backwards a turn before screwing it in (wink wink). The SE is still with IBM, I think. She's a class act and a GREAT person. That system (which was at Wisconsin DOT) went away shortly thereafter when the state's computing facilities (and staff) underwent another level of merger, and I stayed at WisDOT to support VAXen, PC's, Apollo HP and UNIX, and then web servers and then web application servers. Jay On 6/28/2013 12:26 PM, Rich Alderson wrote: