Re: Had a major issue with machine not booting fully.

Tim via users writes:

> Michael D. Setzer II:
>
> > Machines all have UPS units, but typhoon had power or for 6 days.
>
> Is there a communication link between UPS and PCs?  You do want a
> UPS to send a shutdown message *before* its battery goes flat.

Yes. Whatever's being used, apcupsd, or nut, has a constant communication  
link going which reads the current state of the UPS, on AC power or on  
battery, and the current battery level. You can see that. Good UPSes will  
also report how much wattage is getting drawn from them, even when they're  
not providing the power. You can also adjust the battery level that triggers  
a shutdown. Just before the system turns itself off it'll instruct UPS to  
wait a few seconds and completely turn the power off, then turn it back on  
only after power comes back on and the battery recharges itself. If the  
outage was momentary and the power came back after the shutdown started the  
UPS will still turn off the power, wait a few seconds, then turn it back on.

It's important to fiddle around in your BIOS settings to tell it to start  
the boot automatically after the system power is reestablished. Power  
outages become just a minor inconvenience with a good UPS and a motherboard.

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