Date: Sun, 7 Oct 2007 12:44:46 -0700 From: Gary Kline <kline@tao.thought.org> To: Erich Dollansky <oceanare@pacific.net.sg> Cc: Gary Kline <kline@tao.thought.org>, FreeBSD Mailing List <freebsd-questions@FreeBSD.ORG> Subject: Re: what kind of UPS will work best? Message-ID: <20071007194446.GA69551@thought.org> In-Reply-To: <47084E80.3010003@pacific.net.sg> References: <20071006231203.GA65801@thought.org> <47084E80.3010003@pacific.net.sg>
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On Sun, Oct 07, 2007 at 11:12:00AM +0800, Erich Dollansky wrote:
> Hi,
>
> there are basically two types of UPS' around: online and stand-by or fly-by.
>
> The online version is much more expensive but also much better in
> critical conditions.
>
> Gary Kline wrote:
> > Hi Folks,
> >
> > Recently, a storm happened and the power surge blew me
> > off-line. Time to get serious about buying a UPS that will
> > handle my four main servers for at-most, a 10-second power
>
> You have the choice between four individual boxes or one big box.
>
> Cases like this let the online version shine. Stand-by versions fail
> pretty often especially if you have a neighbour around running big
> engines powered directly from the power lines.
>
> Even big air-cons can cause the problems.
>
> > Linux} computer? Is there a UPS that is designed for heavy use
> > and a very short (5- to 10-second) uptime? I'll need one that can
>
> I do not think that it is a good advice to go for 10 second uptime. Take
> a rating fitting your machines (400W power rating for the machine, 600VA
> for the UPS) with at least 10 minutes uptime.
>
> APC supplies you with both types of UPS.
>
> All APC I have seen failing were of the fly-by type, all other were the
> online version. I think, it will be the same for any other brand.
>
> But do not drop dead when you see the price difference. This will be
> money well spend.
>
First, thank to both you and Bart for your cmments. You were
*right* about the price. Can I assume that a ballpark would be
400W for each server? (My wife is right: I've got to cut back to
three computers:-) I've found one APC 2200VA with a 17minute
uptime. 3 times 400W, yes?
The first thing is to be sure of getting large enough UPS to
bridge the few-seconds power outtages or fraction/section surges.
So I need help there. Another question or two can wait.
thanks for any further clues!
gary
> Erich
--
Gary Kline kline@thought.org www.thought.org Public Service Unix
http://jottings.thought.org http://transfinite.thought.org
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