[Nut-upsuser] NUT messes up UPS after mains power is restored

kevindd992002 at yahoo.com kevindd992002 at yahoo.com
Tue Dec 31 15:11:24 GMT 2019

So there isn't really anything we could do here to solve this, right? Smart
UPS'es already know how to do a force reboot when the mains get back after a
power race but they don't account for the graceful shutdowns of the slaves.




Kevin Mychal M. Ong

Sr. Infrastructure Engineer, Microsoft Technology Services - Messaging

Global IT Operations

Ingram Micro Incorporated


Email:  <mailto:kevindd992002 at yahoo.com> kevindd992002 at yahoo.com

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From: Nut-upsuser
<nut-upsuser-bounces+kevindd992002=yahoo.com at alioth-lists.debian.net> On
Behalf Of Stuart Gathman
Sent: Wednesday, September 5, 2018 1:12 AM
To: nut-upsuser at alioth-lists.debian.net
Subject: Re: [Nut-upsuser] NUT messes up UPS after mains power is restored


On 09/04/2018 12:36 PM, Ong, Kevin wrote:


I think I know what I did wrong. In step 7, I plugged the mains too early
causing a power race condition as described by point #51 here
2BQn9U89Gt6rEETaR5jfROkyUp1zKHPIv%2BUQckJxjEU%3D&reserved=0>  . I thought
that when APC BR1500GI's display went black (even with the fans still
running) it is already in a shutdown state. This was not the case, it waited
for a few more seconds until it totally went silent. At that time, I plugged
the mains back and everything was working as expected :)

Unfortunately, electric utilities are not always so polite.  They have a
habit of restoring power at the most inopportune times.

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