Last night's shutdown went fine. We lost a single hard-drive somewhere, probably on the Solaris/Linux side since I know we didn't lose any on the Windows/NetWare side. The power guys found the problem, and were able to get the UPS up and running. We're running protected right now.
What was the problem? Well, I know what I was told yesterday, and I'm not able to translate that into anything intelligible. I'm not an electrical engineer. If I caught it right, and it is decidedly possible I didn't, the circuit breakers in the UPS cabinet were configured to trip for the wrong condition. An overly conservative condition. This was done when the UPS was installed back in 1999-2000, and we only just discovered it because we haven't had to take the UPS down since then.
We get to do a last set of maintenance in two weeks. This is where they move the breaker to a new electrical panel. This will be done with the UPS on bypass, and shouldn't interrupt the load. We'll be keeping an eagle eye, of course, but don't expect any problems.
What was the problem? Well, I know what I was told yesterday, and I'm not able to translate that into anything intelligible. I'm not an electrical engineer. If I caught it right, and it is decidedly possible I didn't, the circuit breakers in the UPS cabinet were configured to trip for the wrong condition. An overly conservative condition. This was done when the UPS was installed back in 1999-2000, and we only just discovered it because we haven't had to take the UPS down since then.
We get to do a last set of maintenance in two weeks. This is where they move the breaker to a new electrical panel. This will be done with the UPS on bypass, and shouldn't interrupt the load. We'll be keeping an eagle eye, of course, but don't expect any problems.