Nut upsuser - Apr 2014 - UPSMon question

Hi all:

I have an APC1400RMXL with an SNMP card in it. It is set to do it's 
runtime calibration every 14 days, but I have noticed when it does this, 
my file server, which is supposed to shut down immediately in a power 
failure, as it's the largest load, will go into shutdown. Is there a way 
I can test for line voltage coming in to the UPS, and if it is "0",
then
use that to force a shutdown, rather than being on or off battery? Or is 
there some other configuration I can use that will accomplish the same 
thing.

Thanks,
Richard.

-- 
Alberni Valley IT Services

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On Apr 8, 2014, at 5:01 PM, Richard Whittaker wrote:
> I have an APC1400RMXL with an SNMP card in it. It is set to do it's
runtime calibration every 14 days, but I have noticed when it does this, my file
server, which is supposed to shut down immediately in a power failure, as
it's the largest load, will go into shutdown. Is there a way I can test for
line voltage coming in to the UPS, and if it is "0", then use that to
force a shutdown, rather than being on or off battery? Or is there some other
configuration I can use that will accomplish the same thing.
Hi Richard,

Technically, NUT is looking for the combination of "On battery" and
"Low battery" before it shuts down, so in your situation, I would be
concerned that the UPS is sending a spurious low battery signal (or that NUT is
misinterpreting the UPS status that way).

If you can schedule a maintenance window around the self-test time, I would
recommend stopping the upsmon process (to prevent the system from shutting
down), and restarting the snmp-ups driver in debug mode. You can also
independently run snmpwalk or another SNMP monitoring tool, especially if you
have an up-to-date copy of the APC MIB.

More specific advice will probably depend on the version of NUT, and the version
of the firmware on the SNMP card. Also, are you using upssched or something
similar to shut down the file server first?

-- 
Charles Lepple
clepple at gmail