General > General Technical Chat
Why aren't computers designed to handle power failure?
SilverSolder:
Having an external UPS is actually quite good if you have more than one device you want to protect from power loss / brownouts.
I have an ancient APC UPS (with a fresh battery!) under the desk, it is able to keep everything on the desk alive for about an hour after a power failure (i.e. the PC, test equipment, etc.). It can communicate with the PC so it can shut itself down safely. You could even write a program that shuts other things down safely, if the PC can be made to communicate with those things.
Raj:
--- Quote from: SilverSolder on June 14, 2020, 04:32:48 pm ---Having an external UPS is actually quite good if you have more than one device you want to protect from power loss / brownouts.
I have an ancient APC UPS (with a fresh battery!) under the desk, it is able to keep everything on the desk alive for about an hour after a power failure (i.e. the PC, test equipment, etc.). It can communicate with the PC so it can shut itself down safely. You could even write a program that shuts other things down safely, if the PC can be made to communicate with those things.
--- End quote ---
An hour (as opposed to mine doing just 2 minutes max)? Holy cow, I need to get one
madires:
That's fairly simple, just oversize the UPS. Most datasheets state the runtime for full load and 50% load. If your load is 100VA a 200VA UPS might give you 8 minutes (3 minutes at full load). The 500VA model runs for 20 minutes, and the 1000VA UPS will give you 40. Several years ago my old UPS broke down but I had an old rackmount UPS from a datacenter at hand (large, heavy, 8 SLAs). That beast was able to power my SOHO datacenter for 3.5 to 4 hours. But it's no UPS you would usually place in you home office, so I bought a smaller SOHO friendly model which provides power for about half an hour with one server running.
bd139:
Comedy gold. I had a 1KVA APC which just exploded when the power went out :palm:. Was only three months old as well.
SilverSolder:
--- Quote from: bd139 on June 14, 2020, 06:33:25 pm ---Comedy gold. I had a 1KVA APC which just exploded when the power went out :palm:. Was only three months old as well.
--- End quote ---
You should know better than to buy new stuff! :D You need equipment with some experience...
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