-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf
Of
Les Mikesell Sent: Tuesday, February 03, 2009 6:42 PM To: CentOS mailing list Subject: Re: [CentOS] 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.