In message <m38ypqzro4.fsf@merlin.emma.line.org>, Matthias Andree writes: > Erez Zadok <ezk@fsl.cs.sunysb.edu> writes: > > > No kidding. I have raid5, plus a spare, plus a UPS, and I still got hit. > > People in the area said that there were such terrible power spikes that even > > an average UPS might not have been able to totally filter those out. > > There are several UPS types available, off-line (switch to battery when > the power goes down, but bypass as power is there), off-line with > monitoring for irregularities, and on-line. El-cheapo off-line aren't > supposed nor able to suppress spikes. Which one do you use? I have the APC Back-UPS LS700-usb model. I believe it's off-line, but it should suppress spikes and clean out the power: that's one of the main reasons people get UPSs (and in our area, small power fluctuations occur 1-2 times a week normally!) Even APC's power strips are supposed to clean the power a little. I think in the case of last week's power failure, however, my el-cheapo UPS couldn't handle that large of a spike. I can't blame APC really --- this kind of drastic power failure is not something one can plan for (it's like trying to design buildings that can sustain a direct nuclear explosion :-) Erez. _______________________________________________ Ext3-users@redhat.com https://www.redhat.com/mailman/listinfo/ext3-users
