[Nut-upsuser] PW9120 - Shutdown condition?

Tobias Balle-Petersen tbp at kontrapunkt.com
Fri Nov 9 13:53:04 UTC 2007

Hello Arjen.

Arjen de Korte wrote:
> Still, it would be a good idea to test with 'upsmon -c fsd' first. You
> want to make sure that shutdown command is sent to the UPS when going
> down. Preferably when the system is *not* powered by the UPS, to see that
> the system is halted before the power is lost. There is no need to deplete
> the battery for that.
> This will have to tested anyway, since you also want to verify that you're
> not vulnerable to power races (see 'docs/shutdown.txt'). If the UPS is
> briefly shut-off and restarted automatically, you're fine. The next
> experiment should be the same command again, but now with the power to the
> UPS removed. Now the UPS should remain off until your apply the mains
> again.
> The last test is if everything works correctly if you create a power
> outage when the system is powered by the UPS, but only if you've made sure
> that the above steps are OK.

Thank you for the suggestions. I will perform my testing as you have described. Maybe this should be
in the FAQ? I was not able to find info on testing as good as what you wrote above.


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