On Wed, 2008-04-30 at 19:04 -0800, dwight at supercomputer.org wrote: > On Wednesday 30 April 2008 01:00:32 pm Mikkel L. Ellertson wrote: > > Patrick O'Callaghan wrote: > > > I've had a UPS for at least the last 5 years (not the same one) > > > since power here is iffy even at the best of times. At the > > > moment I use an APC 1KVA unit. Unfortunately for reasons I can't > > > quite fathom my machine still doesn't survive power outages even > > > though the other stuff on the UPS (monitor, DSL modem, router, > > > printer) all do. I've checked the earth (ground) connection and > > > it looks OK, and the UPS light shows green, i.e. all OK. The UPS > > > is only a year old so it can't be the battery. > > > > > > poc > > > > It could be the time it take to switch between line power and > > battery. It tends to be more common with fully loaded power > > supplies. There is not enough reserve in the filter caps or > > something to carry over the loss of a cycle or two. A UPS that > > will also compensate for line voltage tends to have less of a > > problem with this because there isn't the abrupt changeover. > > > > Mikkel > > I concur. Also, my experience with APC UPS's is that they generally > didn't become real UPS's until their SMART model (and above) series, > starting with the (older) 1400 and now the 1500 smart model series. > The lesser ones just didn't have the proper electronics. > > It's not clear to me which model you have. But generally price is a > good indicator. I always avoid the cheap UPS's. It's a Back-UPS RS/XS 1000, and in fact it didn't fail. It was my own fault for having the cpu plugged into one of the non battery-backed sockets. poc -- fedora-list mailing list fedora-list@xxxxxxxxxx To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
