I have a APC 3000RM UPS that is powering about 10 servers. I also have a backup generator and an automatic tranfer switch for a serious poweroutage. I have not had powerchute network shutdown installed on the servers, but recently installed it just in case the generator does not kick on. However I ran into an issue today.
There must have been a surge or some momentary event that caused the UPS to switch to battery power. Becuase of the load, there was only 2 minutes of runtime left. this signaled to shutdown the servers. The APC then seemed to shutdown itself for a few seconds and then turned back on. This caused a few coldstarts on the servers that did not get a chance to shutdown properly.
now my question is why did the APC send out a shutdown command? What is the event that triggers this? I have the events on the powerchute agents set only to log event, so I am not sure what triggered them to shutdown.
If it is just the condition of low-battery that causes this to occur, where is the conditions for low-battery defined on the APC?
here are the events from the APC if they help:
3/24/2011 12:53:48 UPS: Turned on.
03/24/2011 12:53:44 UPS: Turned off.
03/24/2011 12:52:15 UPS: Started reboot sequence.
03/24/2011 12:49:15 UPS: Battery discharge condition cleared.
03/24/2011 12:48:13 UPS: Graceful shutdown by PowerChute ns from 192.168.1.14.
03/24/2011 12:48:12 UPS: Returned from a Low-Battery condition.
03/24/2011 12:48:12 UPS: Batteries discharged.
03/24/2011 12:48:11 UPS: Battery power is low and will soon be exhausted.
03/24/2011 12:48:11 UPS: Battery discharge condition cleared.