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So if your Unraid box's PSU could draw 300W max, you'd get 440W/300W * 8min = 11min total. Initiating shutdown after 15mins doesn't sound like a bad idea.
#Cyberpower cp1500pfclcd unraid setup full#
So shutdown at full load b/c of disks spinning up, let's say it takes 10mins to be safe, leaves me with 19min left in the battery. Not like "double the numbers", but what's actually possible. I'm working with theoretical maxima to err on the safe side. 8min at 50% of 880W = 440W results in roundabout 440W/120W * 8min = 29min I can work with.My NAS is way below the 50% load mark at 120W, so I'll use the 50% numbers as reference.I configured my Unraid so that it should shut down when there are 10 minutes left of battery power, thinking that 10 minutes is very much long enough for Unraid to shut down, by some margin. Hi, Just a heads-up to everyone who uses a UPS with their Unraid setup.
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My NAS has 120W max (60W when all disks are spinning, 22W when idle) PSA : double-check your UPS shutdown configuration and don't be a Noob like me.You also need the runtimes at full or half load and know the draw from your Unraid box and modem. To eyeball the numbers from a product catalog (it's 1350VA/880W on the website), that's the max output. According to my calculations, this would still leave it 30 minutes to shut down even with all drives spinning, and I hope that I now have enough margin for any other unaccounted factor! I now set my shutdown trigger to when the battery has only 50% power left. So, give your Unraid enough time and power to initiate the shutdown earlier. Gladfully, as there was no activity on Unraid, I didn't suffer any disastrous data loss or corruption. I stand in front of it with my hair on fire and yelling "STUPID STUPID STUPID"!.Poof - no more power left, UPS makes *rapid series of panicced UPS beep noises* and says bye-bye, and Unraid rig is left without power and goes boo.Energy consumption goes from a few Watts to over 50 Watts as the drives spin up.And now the unplanned / not thought of part (stupid me!) : all drives in the array were spun down during the power outage, and now Unraid spins up the array to perform the shutdown.