UPS question

David Brodbeck gull at
Thu Aug 12 19:49:24 UTC 2010

On Aug 12, 2010, at 12:40 PM, Ryan Coleman wrote:
> Yes. The downside comes from when the BIOS is told to turn on the  
> server at, say, 10pm and the power is still out... it starts the  
> process and runs out of battery mid-way through the boot before it  
> gets the chance to load the UPS controller.

You may want to think about using two UPS units -- a large one for  
your server, and a smaller one for your network stack.  This way you  
can use UPS monitoring software (like NUT or PowerChute) to have the  
server command its UPS to switch off when it's fully shut down.  Then  
when power comes back the server UPS will switch back on and the  
server will boot back up, assuming you've set the BIOS to boot up on  
power recovery.  Some UPS units have the ability to set a power  
recovery delay to ensure the battery has some charge before the server  
starts up, too.

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