May 7, 201214 yr Good morning all- I could have sworn I saw a post with this same topic with a solid answer, but could not find it for the life of me. I am looking for a UPS (probably APC more than likely) for my unRAID box and maybe a couple of other devices (nothing that uses as much power as my unraid) so it doesn't need to be a beast of a UPS. I would be using the clean power down and ups monitoring package, so it needs to support that. What is everyone else using? Of course the reason for this is the fact that I just lost power last night and my current UPS battery is dead, but better late than never. Thanks in advance
May 7, 201214 yr Here's mine... http://www.apc.com/resource/include/techspec_index.cfm?base_sku=br800i Maybe overkill for your needs - depends on the server and the duration and frequency of your typical power failures. I would certainly recommend to stick with APC since they seem to be most readily supported by add-on software.
May 7, 201214 yr Author Thanks S80- Your UPS is not available here in the US. So, i started looking around a bit further. I found this one: http://www.cdw.com/shop/products/APC-Back-UPS-ES-750-Green-750VA-UPS/1361630.aspx In which I found this info: Interface Provided Interface: USB Qty: 1 Type: Management Is the management port what I am looking for for the ability to have the server shut itself down if power is lost? This UPS seem like a decent one assuming the server shuts down if necessary?
May 7, 201214 yr My philosophy is bigger is always better, at least when it comes to electronics! The smallest UPS I buy are APC Smart UPS 1500s.
May 7, 201214 yr What StevenD said. The size/power draw of your unRAID server will determine the proper size. Note it will require to properly support all drives spinning up. Take a look at the graph...and how much time do you want to have unRAID run on the batteries before the shutdown http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BR1000G&total_watts=200&tab=models Comparison runtime http://www.apc.com/products/runtime_for_extendedruntime.cfm?upsfamily=27
May 7, 201214 yr I found the APC page for that model... https://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BE750G&tab=models To answer your question - yes, the USB connection (referred to as Management) allows the software on the server to monitor the state of the mains, batteries, etc - use the APCUPSD add-on (via unMenu or there is a plugin you can use for unRAID 5.x). You specify some time parameters in the APCUPSD settings - things like how long to run on batteries before shutting down. Then when there is a mains failure, the server will initiate a clean shutdown (which avoids parity issues). The software can also be set to command the UPS to switch off after the server in order to preserve charge in the batteries for the next time. As for which model you choose - the power rating obviously depends on your needs - as others have posted, bigger is better (but within reason). In my experience you will always find other devices to add to it (mine provides back up power to my cable modem, router, switch, KVM box, monitor and a desktop PC).
May 7, 201214 yr To estimate W... http://lime-technology.com/forum/index.php?topic=6695.msg64801#msg64801 or get a Kill-A-Watt to measure actual.
May 7, 201214 yr i am using one of these (and yes it is overkill for just the server but i have other components on there also) http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SU2200RMXL3U i also have a couple of these (they are extra batteries to make the system last longer) http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SU48R3XLBP i have a couple extras that i could sell if you are interested. shipping would be ridiculous, but i do drive truck so i could meet somewhere. the only issue that i have is that you need to install a new outlet. it is a much bigger outlet than the standard. it is still 120v, just a larger outlet. capable of handling 20-30A christopher
May 7, 201214 yr Author All great information (including that power supply calculator)! Thank you to all that replied!
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