Kjell Claesson wrote: >> Should I try changing the polling frequency just to see if it helps > Don't think it would help. If it would be a problem with poll frequency, the > error should be continuous and constant. The same is if there was any problem > with the driver to the specific model of ups you are running. > > The driver polls the same data every time, so the error should happen on every > poll. > It doesn't happen on every poll, sometimes it goes a half-hour at a time with no errors.
>>> Can you relate the errors in the log to any activity? Is the time random >>> or is it spread evenly over time ? >>> >> I am not getting any other errors or events or significance or that >> correspond with the UPS errors. The comm errors are not continuous, but >> there doesn't seem to be a strict pattern. They seem to cluster one >> every minute or two for between two and ten minutes at a time, with >> periods of between a half hour to an hour of quiet between the clusters > This sound like a kind of EMI. Do you have the beer fridge > beside the computer :-) > > Check your vicinity for any source of EMI. Fan motors for ventilation, old > dimmers, fridges, air-condition. > The equipment is in a cabinet in a data center environment, and is the only cabinet in the row with any equipment in it. There is no row in front, and the row behind contains only datacomm equipment -- routers and switches. I tried replacing the cable and re-routing as far away as possible from any power cables, and also connected it to a different server, and still get the same result. One thing I noted though, is that the serial card in the UPS is beige (Compaq) in color, while the rest of the UPS is gray (HP) in color, so I am guessing it was swapped at some point. I wonder if that card is the problem. I have another, so I will try swapping it out and see if that helps. Thanks, David
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