stanonik@nprdc.arpa (Ron Stanonik) (03/22/86)
A few weeks ago we began getting <DPPE> (data path parity error) errors from our second unibus when trying to read tapes. Since the other equipment (dh's and an interlan card) on that unibus didn't produce the errors, we suspected the tape controller. Replacing the controller didn't cure the problem, so we wondered if the tape drive itself might be producing faults which manifested themselves as unibus errors. After running the tape drive on another machine without error, we began to wonder if the unibus adaptor might really be at fault. A little uba card swapping and some diagnostics bore that out. We still don't understand why the other devices didn't produce the same <DPPE> errors, but maybe this will save someone some effort. Ron Stanonik stanonik@nprdc.arpa