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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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APCUPSD and Hyper V R2

I'm about to deploy a Windows Server 2008 R2 machine with the Hyper V role. I'd like to get away from having to use a network management card with my APC UPS as I'm only shutting down 1 server (it just seems like an unneeded point of failure). I'd…
Jason Berg
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Benefits of a RAID BBU in addition to a double UPS + PS system

Today I roughly measured the benefits of enabling write-back on the RAID controller on a server at work. It got no RAID battery-backup-unit (BBU) so the write-cache is currently disabled. As the server is not used to capacity (by far), the results…
Wikser
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Configure server to start on power restore

I have a UPS which is configured to shut down my server when power goes off, and turn off the UPS a minute after. The server is an industrial pc Advantech ARK-2151. It has 2 BIOS options for Restore AC Power Loss: power on, and "last state". My…
Vallo
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Consumer grade UPS – safely provide more outlets/extensions for wall warts?

I am helping a small business redo their networking, and one of the items I recommended was an APC BR1500MS. Their setup would be Wall outlet (standard "home" outlet) -> UPS -> UPS Battery backes Outlet -> belkin surge protector -> a bunch of small…
solenoid
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Can't get upsmon service started to monitor (and respond to) remote UPS

I am having difficulty getting my nut install to simply monitor a single remote UPS attached to a Buffalo LinkStation Duo. I can manually correctly read its status using upsc ups@buffalo.local and it is user / passwordless. Long-run, what I want is…
stefandz
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How do I pick a UPS for a graphics rendering machine?

This is a SuperMicro station very heavy on video processing, with 4 hard disks and a 26" monitor. It has two AMD Firepro graphic cards and two 1400W Supermicro reduntant PSUs. I understand the actual usage won't be 1400W, so how can I pick the…
Zopiro
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Estimate power and cooling for server room

We are trying to determine the right power and cooling for a new server room which would be about 350 sq ft., our power is 220V. We are initially only planning to start with a single rack with potential of expanding upto 4 or 6. The rack would have…
jackie1100
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What is the difference between the "Write" and "Write+" modes on an APC SNMP card?

I'm configuring a UPS to be controllable via SNMP and have come across to options: Write mode Write+ mode I've tested both settings and only Write+ works for me so it's what I'll have to use. I'm interested to know what exactly Write+ enables as…
Matt
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APC UPS -> Windows SNMP

We have an APC UPS. I want a Windows 2012 R2 server to shutdown on a power breakdown (and the remaining power lasts for e.g. 15 minutes). Therefore the UPS should send a message to all servers via SNMP. I think this should be possible. Is there an…
C.M.
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UPS systems in parallel for redundancy and/or capacity, generator as backup, ATS,

I am about to upgrade our server room's power plan and would kindly ask you for your help with a proper, optimal design / advice on "good practice" approach. Please note that our business is small, but would nevertheless want to have a solid…
Charlie
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Cyberpower UPS usage with a Linux arm based sytem

I have a UPS (Cyberpower CP900EPFCLCD) which I would like to connect to an arm based server via USB. Unfortunately, Cyberpower doesn't provide a daemon for arm based platforms at the moment. Is there any other method I could use to get my arm based…
tisch
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NUT UPS-Dummy driver in repeater mode for Synology NAS

I have a NUT client that requires the UPS it monitors to be named ups. The client (a Synology NAS) does not provide a method to change this configuration. My setup consists of multiple UPSes monitored by a single master and I'd rather not have 1/4…
Jon
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FreeBSD determine if reboot was due to power loss

We are running FreeNAS (which is built on FreeBSD) to run our data storage systems. It is running on an APC Smart-UPS 750VA X. On a couple of occasions, I have been alerted to the fact that the server is down by our monitoring systems. After a few…
Chris
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After UPS battery replacement (HP R/T 3000)

has any one had experience with this UPS? i have replaced the batteries but have't ran self test yet, if i run self test is there a risk of powering down the machines the UPS powers? just wondering if i should run the self test out of hours or…
GordonBpdZenith
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apcupsd vs NUT in Proxmox environment

I have a Proxmox node which is actually is HP Proliant DL 320e G8 server + APC SmartUPS 750 connected directly to the server by usb cable. On the host are running several Linux VMs. My question is - which software are better for graceful shutdown…
powerthrash
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