We had some Fujitsu Eagles with that exact same problem. Go figure. Sent from my iPhone
> On Jul 3, 2025, at 13:39, Nigel Johnson Ham via cctalk > <[email protected]> wrote: > > On 2025-07-03 16:12, Wayne S via cctalk wrote: >> Yes, stats are kept about issues. >> Someone should look at the stats and start to investigate when there’s a lot >> of failures with the same issue. Explicit instructions should be sent to >> field engineers to take extra steps to document what they found and how it >> was resolved, and report their conclusions back to the investigation leader. >> >> That’s how IBM did it. >> I know DEC kinda did it for software on VMS though their “Software and >> Solutions” database. I really liked looking at that. >> >> Sent from my iPhone >> >>>> On Jul 3, 2025, at 12:52, Paul Koning<[email protected]> wrote: >>> >>> >>> >>>> On Jul 3, 2025, at 2:26 PM, Wayne S via cctalk<[email protected]> >>>> wrote: >>>> >>>> That’s a good business practice anyway. You want your high price system up >>>> and running as fast as possible, so not having to do more than cursory >>>> diagnostics is a good thing I think deck realize that with the VAX and >>>> it’s remote the diagnostic capability as for the board breaks, IBM used to >>>> do that for all the boards they replaced. They even had a special board >>>> breaking tool. >>>> My CE from IBM said that it costs IBM more to diagnose a faulty board than >>>> it does to make a new one so that’s why they do it. Breaking the board >>>> also ensures that the engineers won’t get caught up in a side project >>>> trying to figure out what went wrong. >>> That's true for problems seen occasionally. When people realize a >>> particular issue appears "too often" it does become an engineering matter, >>> because then it indicates an issue with design or manufacturing or part >>> selection. >>> >>> For example, I remember a product that had a memory backup battery issue, >>> which turned out to be a change in plating for the battery holder. For >>> engineering it turned into an exercise in learning what "electrovoltaic >>> series" means -- not something familiar to most digital logic EEs. >>> >>> paul >>> > Stats are very important if the manufacturer has a lot of their own product > under comprehensive maintenance agreements, especially fixed disk drives that > would require major time to recover from backups when they fail. Control > Data had a problem once, I believe it was with the MMDs, where they noticed > premature failures in the field. Because they kept accurate records, they > were able to trace it back to serials after a particular date when a water > filter had been changed at the factory and the new one caused some sort of > problem with the epoxy holding the magnetic material to the substrate. > > cheers > > Nigel > > > -- > Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU > Amateur Radio, the origin of the open-source concept! > Skype: TILBURY2591 >
