ReadyNAS Ultra 4 BIOS

When a critical battery level is reached, a NUT Master server can (and does in my case) send a signal via the USB connection/driver to the UPS which kills the load and cuts power to the protected outlets.  I can confirm this is happening as I've got my switch attached to it as well.  The switch loses power once the NUT master server sends the "load.off" command as the outlet it is connected is no longer powered.  But unfortunately for me, the UPS restarts itself (something the NUT developers confirmed can happen here, quote below), power is restored to my switch, and the NAS as well.

ondelay... "Some UPS’es will restart no matter what, even if the power is (still) out at the moment this timer elapses."

The suggestion they make to get around this does not work for me either.  Go figure...  And it's a "cheaper" Tripp Lite UPS (ECO350UPS) so who knows if things are implemented to standards (you mentioned an internal setting being wrong which is entirely possible since the value retrieved by NUT for ups.timer.reboot and ups.timer.shutdown from the UPS are 65535 whereas I'm seeing other "better" UPS's have a value of -1 here while the power is on, plus it only supports a generic driver).  There's also reports of CyberPower UPS's having similar behavior where no matter what value NUT sends as the ondelay value, the ups sets it to 10 and restarts after 10 seconds.  FWIW, I've also set this value extremely high so that if the my UPS will restart no matter what, why not make it wait a few tens of hours?  I figured that would kill the battery but my UPS still restarts itself after a few seconds.

Back on topic...  So the voltage present on the plug the NAS is connected to (from the battery) is lost.  Then a few seconds later, the UPS powers up, power returns to the protected outlets, and the NAS starts itself thinking power has been restored.

As for the test you suggested...  The NAS unit does shut down and does not automatically restart.  BUT...  As described in the other post as well, this happens because voltage remains live on the outlet.  If I unplug the NAS, and then plug it back in, the unit power up right away which is essentially the same thing that happens when my UPS powers down (and subsequently powers back up) during an outage. 

It seems that Netgear chose this functionality by design as most people probably would want to restart automatically after a power outage.  I, and apparently ReadyAS, are not most people and do not want this though.  Why Netgear chose to not make that an option in the UI is beyond me.  My second NAS (a QNAP) is configured this way to not start after power is restored due to my annoying UPS sitution...  QNAP even lets you chose to restore the last state so if you shut it down gracefully and then power is restored it _won't_ come online, or if it was on when power was lost it will turn itself back on, which means it's doing something to make that decision in the absence of a physical on/off switch.  I've seen the arguement that Netgear had to hide this setting because of the scheduled power on options but that doesn't sit right with me.  If one vendor can do it (use trickle power to determine if it should come online or not when that trickle power is restored), the other vendors should be able to as well.

And I fully acknowledge that it's very easy for me to say that on the outside.  Maybe there is a technical reason and Netgear could not expose this.  Maybe not...  There hasn't been much said by them over the years of posts I've found on this topic though.  

The new cable will be here tomorrow.  I hope to have an answer shortly after that.