@AC Re: Oops - Argus at AGC
I was fascinated to read that the Argus 500 with my hot backup software was still running the Advanced Gas-Cooled Nuclear Power Station after the 2MB Burroughs Disks were replaced. I debugged the OS on those machines.
One of those Burroughs disks had an intermittent problem when it was delivered, would drop a couple of bits once every few hours. A keen hardware engineer sat looking at a scope connected to the data lines waiting for the problem to occur. He spotted that there was a glitch when the vacuum pump operated - the disc was in a sealed enclosure, with a small window through which we could check how bad the scratches were after a head crash. He replaced a filter across the pump drive circuit, and the drive never lost a bit again.
My help-desk story: I was called up one night at 3am by a power station operator telling me that the printer wasn't working. It turned out it had run out of paper. I led him through connecting up a new box of fan-fold paper and went back to bed. An hour later I'd just got back to sleep when he rang me again: "the printer is working ok now" .