On 2017-08-08 14:41, Greg Freemyer wrote:
Paul,
I'd chase the SCSI error you're now getting. It is consistent/reliable, unlike the problems I was fighting 25 years ago.
FYI only:
When I had my power issues in France 25 years ago I found nothing wrong when testing with a voltmeter. But I was getting desperate and rented a AC line monitor that was the size of an oscilloscope or bigger. Its job was to look for spurious anomalies and record them. As I recall, it detected significant spikes on the ground/neutral throughout the day as other equipment in the building turned on and off. It was a commercial building with 50+ people working in it, but of a low-end modular construction. As I recall, each room had a window A/C unit. I don't know EU power well enough to knowledgeably discuss how spikes could happen or how it could impact the computer's operation. Maybe there were other ways to fix the problem. I only know we fixed it by installing the ground rod.
Any motor starting-stopping with switches (like a thermostat) produces a spike on the lines, but not on the ground line. However, line filters pass on the spikes to the ground line. If the building ground line (I'm considering the UK or France electricity code similar in this respect to Spain code) is not good, ie, there is a noticeable resistance, then the voltage in the ground line goes up in all the building. So in that case using a separate ground does a difference.
This picture is of a similar cockpit trainer, but I don't recall what kind of airplane the cockpit trainer was for: http://www.flightdecksolutions.com/assets/images/large_images/fds-a320-pro-m...
I want one for home! ;-) -- Cheers / Saludos, Carlos E. R. (from 42.2 x86_64 "Malachite" at Telcontar)