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Questions tagged [ups]

uninterruptible power supply

An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide instantaneous or near-instantaneous protection from input power interruptions by means of one or more attached batteries and associated electronic circuitry for low power users, and or by means of diesel generators and flywheels for high power users. The on-battery runtime of most uninterruptible power sources is relatively short—5–15 minutes being typical for smaller units—but sufficient to allow time to bring an auxiliary power source on line, or to properly shut down the protected equipment.

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Source: wikipedia

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Older UPS smells like burning

Just trying to investigate cause of an older UPS that smells like burning plastic. Is it likely to be the electric socket, the cooling system of the UPS, or has the unit faulted? If so, what causes these faults, such that I can prevent my office…
Incognito
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Uninterruptible Power Supplies: Line-interactive vs Double-conversion / online

We recently got an inline generator installed at our facility that backs up our IT room. It detects the outage and kicks on within about 20 seconds of an outage. For those 20 seconds between the time of the outage and when the generator takes the…
pk.
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ESXi shutdown by UPS system

If I use a script to shutdown my ESXi server in the event of a power outage, do I need to shutdown each VM or will ESXi shutdown all of the VMs for me? When I mean shutdown I mean a graceful shutdown not a hard power off.
AtomicPorkchop
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IS this a bad UPS? It shuts down if overloaded

I'm having difficulty selecting the correct UPS for my home configuration. I have 2 machines I'd like to keep online. We have been having daily power failures (2-4 seconds) and I think that can't be good for the H/W. So I got a cheap Ultra UPS but…
bobobobo
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What happens in case of utility power failure?

(in the office) Today, the UPS battery replace warning light lit up and there was a slight panic as the all the technical people will not be around the next few days. But after thinking a bit further, I realise that in case of power failure, no…
Jake
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MGE UPS Cut power - What happened?

I have 3 x MGE Pulsar M 3000 2700w UPS units within my server room which have run perfectly up until now. On Saturday morning I noticed that one of these UPS units was no longer outputting power, the lcd displayed a message saying "load not…
JT.WK
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How to clear the REPLACEBATT state from APC UPS after hot-swapping the battery

I replaced a battery in APC SmartUPS by hot-swapping. While the swap was all right and didn't disturb connected computers, the "Battery failed" LED on the front face kept glowing. I tried to use apctest from apcups package. Turned off the daemon and…
Hubert Kario
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Power strategy for first server rack

We are about to install our first server and networking rack at my office. I'm more of a programmer than a sysadmin, so I'm learning as I go. Let me start by saying that it's just a router, patch panel, and PoE switch that will be going on the rack…
Jon
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How to shut down Hyper-V Server 2008 R2 from acpupsd?

I have several computers connected to a single APC SmartUPS 1500. The UPS status is monitored by a server running acpupsd. The other computers also have apcupsd installed, and poll the main computer over the network to get the UPS status, and they…
Nic
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What LPR arguments do I need to print a 1400x800 pixel image on a 4x6 label?

This is driving me nuts. UPS sends our system a 1400x800 GIF image of a shipping label, which is supposed to fit nicely on a 4x6 page. Unfortunately, I can't seem to get the command line options right to make it happen. We're using an Eltron/Zebra…
Nick
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Server UPS problem

My sever needs 10Kva UPS but i have connected all the six rack severs+ SAN storage in a 5 Kva UPS...power shut down is 99.9% impossible..but still wat would happen if power goes off ! suggest and advice..!
desparado
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Nema 5-20 Female to Nema 5-15 Male Power Adapter for UPS: safe?

I bought a large UPS for my server and didn't realize it comes with a NEMA 5-20 plug. We're in a residential setting and don't have those outlets. I see Nema 5-15/20 Female to Nema 5-15 Male Power Adapters but it seems not safe to me, if the device…
mlevin77
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How to power off a Debian server and a UPS on low battery?

How to configure a Debian server with one standalone USB UPS to: Initiate a UPS power off after one minute when the battery is low. Shutdown itself. And to be sure that when mains power is restored (even before the UPS runs out) the Debian server…
Trayan Momkov
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Shutdown Multiple Servers From One APC USB Port - Power loss event

I've got one Ubuntu box and a Synology NAS. Both are connected to the APC UPS, but only one USB, which is connected to the Ubuntu box. How, specifically, can I get both machines to shut down from a power loss event from one APC USB port?
GisMofx
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APC Smart-UPS turning off by itself?

I have an APC Smart-UPS 3000. Last Sunday, it turned off by itself. Noone was in the office and noone was logged in at the time it happened. What could cause this ? I'm concerned it may happen again. The log show the outputs "has been commanded to…
uski
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