000001f25da983e8-dmarc-requ...@listserv.ua.edu (Robert Longabaugh) writes: > I worked at a telco in the 1980s and the 3033, 3032, and 3033MP were water > cooled. There was a 3037 PCDU (Power/Cooling Distribution Unit). > > I think the 3031 was air cooled.
during the Future System period early-to-mid 70s (completely different than 370 and was going to replace 370), internal politics was killing of 370 efforts (lack of 370 products during the FS period is credited with giving clone makers market foothold). Then when FS imploded there was mad rush to get stuff back into the 370 product pipelines and 303x & 308x quick&dirty efforts were kicked off in parallel. they took 158-3 engine with just the integrated channel microcode (and w/o 370 microcode) for the 303x channel directors. 3031 was then 158-3 engine with the 370 microcode (and w/o the integrated channel microcode) and a 2nd 158-3 engine as the 303x channel director 3032 was 168-3 reconfigured to work with 303x channel director as external channels a 3033 started out as the 168-3 logic remapped to 20% faster chips, some logic tweaks then got it up to 1.5 times a 168-3. 3081 was then some left over work from Future System ... other description of 3033, 3081, and Future System: http://www.jfsowa.com/computer/memo125.htm 3081 TCM fried story: the internal side of the heat exchanger had flow sensor but not the external side. One customer lost flow on the external side ... and by the time the heat sensor registered rise in temperature and cut power ... it was too late, and TCMs were fried. After that flow sensors were retrofited to external side. when the 168-3 engineers got the 3033 out they door, they then started on 3090 (overlapping with work on 3081). I was involved in a product to do a 16-way 370 SMP and I con'ed some processor engineers working on 3033 to get involved in their spare time (a lot more interesting than what they were doing for 3033). At first everybody thot it was great ... but then somebody informed the head of POK that it could be decades before the POK favorite son operating system had effective 16-way support. Then the head of POK invited some of us to never visit POK again (and the engineers working on 3033 to stop being distracted) ... I could sometimes still sneak back into POK. Note that POK finally didn't ship 16-way SMP until z900 Dec2000 (over 20yrs later). -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
