[CentOS] Emergency rescue help needed

Wed Feb 4 07:52:44 UTC 2009
Sorin Srbu <sorin.srbu at orgfarm.uu.se>

>-----Original Message-----
>From: centos-bounces at centos.org [mailto:centos-bounces at 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.
-- 
/Sorin
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