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Hello,<br>
At first, thanks for you advice and clarification on the MAXAGE and
DEADTIME configuration values. <br>
<br>
<blockquote
cite="mid2669.193.67.155.122.1181748475.squirrel@mail.de-korte.org"
type="cite">
<blockquote type="cite">
<pre wrap="">I've installed Nut (2.0.5) on RedHat a week ago, and upsmon seems to
generate false alarms every hour:
...
Jun 8 06:10:56 nutevalserver upsmon[2849]: UPS
usb-mge-evolution@localhost on line power
Jun 8 06:35:46 nutevalserver upsmon[2849]: UPS
usb-mge-evolution@localhost on battery
Jun 8 06:35:51 nutevalserver upsmon[2849]: UPS
usb-mge-evolution@localhost on line power
Jun 8 07:24:47 nutevalserver upsmon[2849]: UPS
usb-mge-evolution@localhost on battery
Jun 8 07:24:52 nutevalserver upsmon[2849]: UPS
usb-mge-evolution@localhost on line power
Jun 8 08:27:07 nutevalserver upsmon[2849]: UPS
usb-mge-evolution@localhost on battery
...
</pre>
</blockquote>
<pre wrap=""><!---->
What makes you think these are false alarms?
</pre>
</blockquote>
<br>
I have 2 reasons for believing these are false alarms:<br>
<br>
1) The UPS doesn't beep and none of the status leds change when this
occurs. I configured nut to page me for 'on battery' events, and while
working in the server room I witnessed how NUT complained but the UPS
didn't give a sign. In contrast, when it goes on battery because I pull
the plug, it beeps, leds flash, ...<br>
<br>
2) Three other servers (not backed up by ups) who share the same power
distribution unit as the UPS are not affected. If these alarms are
real, it means voltage drops to 160V. I thought that would shut a
server down. Maybe you are right and a server can handle this for a
few seconds?<br>
<br>
<blockquote
cite="mid2669.193.67.155.122.1181748475.squirrel@mail.de-korte.org"
type="cite">
<pre wrap=""></pre>
<blockquote type="cite">
<pre wrap="">When I went to the server room almost immediately,
the UPS was fully charged, but the server had shut down.
</pre>
</blockquote>
<pre wrap=""><!---->
How did you determine the battery was fully charged? Did you execute a
battery capacity test at that time? Or did the UPS indicate that the
battery was full?
</pre>
</blockquote>
I didn't do a battery test, just looked at the status leds.<br>
<br>
<blockquote
cite="mid2669.193.67.155.122.1181748475.squirrel@mail.de-korte.org"
type="cite">
<pre wrap="">
It may also mean that the mains to your UPS is browned out (bad cables,
bad socket) or that it just senses that it is, while it actually isn't
(trips on every mains glitch). For testing purposes, I keep one unit that
does the latter. When the distribution transformer around the corner steps
to another tap, it will always go to battery for couple of seconds. This
usually happens a couple of times around six in the morning and around
nine in the evening, every working day.
</pre>
</blockquote>
I'm almost sure the mains are OK since the building is less than 2
years old. Also I connected the UPS to another socket across the room
to no avail. I agree there might be electrical glitches, but wouldn't
the UPS beep then?<br>
<br>
Regards,<br>
<br>
Stijn Gruwier<br>
<p>**** DISCLAIMER ****<br><a href="http://www.schaubroeck.be/maildisclaimer.htm">http://www.schaubroeck.be/maildisclaimer.htm</a></p>
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