ups power supply

[Lennart Sorensen]

On Tue, Nov 30, 2010 at 02:27:20AM -0500, Rajinder Yadav wrote:
> My system take less than 1 minute to shut down. If the shut-down happens  
> without my involvement, 3 minutes should be OK. If however I am away  
> from my Linux box and I need to initiate a shutdown, save stuff I am  
> working on, a 10 min window would be tolerable.

Pretty much all UPSs work with nut or apcupsd these days, which means you
get automatic shutdown when the battery level drops below a programmed
level (so setting it to shutdown when there is 3 minutes left on the
battery is handy.  it won't shutdown on a 5 second power loss, but will
for a longer one).

> I read a few comments online (from buyers) that the battery goes pretty  
> fast as you stated, that's not comforting. Most of the other comments  
> seem to be from people who just purchased the UPS and pretty much it's  
> they typical omg it worked, I got it up and running in x minutes.  
> Comments like that are useless =)
>
> I would love if someone actually pulled the plug on their UPS and  
> reported back what happens, etc. their setup. I read one person complain  
> about a APC UPS making a loud beeping noise every 30 sec and said do you  
> really need that when you're in a blackout and trying to sleep.

If you have an APC and use apcupsd, you can in the config tell it to
silence the UPS.  It is entirely configurable.

-- 
Len Sorensen
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