any good UPS for a Fedora server
Kevin J. Cummings
cummings at kjchome.homeip.net
Wed Nov 14 19:36:31 UTC 2007
Mike wrote:
> I get 3+ hours of run time from this combination (RS1500 plus external
> BR24BP battery):
>
> http://reviews.compusa.com/2795/568415/reviews.htm
>
> The measured power consumption of the singler server that this backs up
> is only 115 watts, pretty low generally speaking.
>
> I use a usb cable between the RS1500 and the server. I've configured
> apcupsd to page me when several different events happen, power out,
> power restored etc.
>
> The downside of the RS1500 and apcupsd is that 9 times out of 10 it
> triggers a shutdown long before the battery is even close to exhausted.
> To prevent this I replaced the shutdown script with a script that does
> nothing. Never did find a more elegant solution.
My problem has always been the opposite, when the battery gets low
enough, can I effect a clean shutdown before the UPS runs out of power.
B^) apcupsd allows you to configure when you want the shutdown to
start either as a percentage of battery life remaining, or at a fixed
time before the batteries dies. Knowing whether either of these is an
accurate amount is the problem. I keep adjusting my values, but full
power outages which drain the UPS are so rare for me that when it
happens, its too late. (OTOH, I get lots of power fluctuation which the
UPS treats as power loss/power restore, usually within 4-5 seconds, but
are actually just short voltage drops (brownouts)).
> In any case this may not be the UPS for you but this works well for me.
> Someone can almsost always get to the server if the "Power restored"
> page doesn't come in within 2 hours of power out...
--
Kevin J. Cummings
kjchome at rcn.com
cummings at kjchome.homeip.net
cummings at kjc386.framingham.ma.us
Registered Linux User #1232 (http://counter.li.org)
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