> From: Jay Jaeger > This sort of situation, where DEC diagnostics run OK but UNIX has issues > was reported to be not all that uncommon - to the point where the urban > legend was that some DEC FE's would fire up Unix V6 as a sort of system > exerciser.
Amusing! Never heard that; our -11's were never under maintenance, so DEC FE's never worked on them. > Make a copy of ls, and see if the copy also fails It acts just like the original; fails when run by itself, runs OK when 'sleep' is also running (in the background). > From: Bob Smith > We finally had the cpu backplane replaced Ow. Not an option for Fritz, I expect. (I dunno - anyone have a spare /45 backplane?) > From: Paul Koning > Is there any way to attach a logic analyzer to various data paths on > this machine? I had suggested to Fritz that the symptoms led me to believe that it was time to deploy a LA, especially since the MM trap only occurs once between him typing 'ls' and the process failing - i.e. easy to trigger on. He offered me the options of look at the IR or at the UNIBUS - I opted for the IR so we can see _exactly_ what the machine _thinks_ it is doing! No report back yet, though. Noel