what kind of UPS will work best?
kline at tao.thought.org
Sun Oct 7 12:44:46 PDT 2007
On Sun, Oct 07, 2007 at 11:12:00AM +0800, Erich Dollansky wrote:
> 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 Kline kline at thought.org www.thought.org Public Service Unix
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