>-----Original Message----- >From: centos-bounces@xxxxxxxxxx [mailto:centos-bounces@xxxxxxxxxx] On Behalf Of >Les Mikesell >Sent: Tuesday, February 03, 2009 6:42 PM >To: CentOS mailing list >Subject: Re: Emergency rescue help needed > >> hospital with power-backups up to yinyang. But it failed when we needed >> them... #=;-( > >It's a tough thing to get right. I've been involved with several >systems and they all failed a time or two in initial testing even after >everyone thought they should work. And then things break after that... The building was built in the 50s, so I guess it's not a testing thing, but rather the second thing you mention. Breakage due to not-too-frequent-use. >Another issue can be that you aren't backing up the air conditioner >power, so when the grid goes down your still-running equipment >overheats, damaging the electronics. This is particularly likely if >your servers are racked densely in a small space. Yeah, it got awfully hot in the basement server room... We don't don’t have any racks though, almost all servers are tower models not too densely packed. About 3-4 per shelf in two rows and two-three shelves in total. The AC is rather over-dimensioned, but when the power is out, it doesn't really matter... 8-/ The good part is that we haven't had any significant power-outs for over two years. Temporary dips and the occasional spike and flicker yes, but no total unplanned black-out. -- /Sorin
<<attachment: smime.p7s>>
_______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos
