Questions tagged [ups]

uninterruptible power supply

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6 views

Can I use higher capacity batteries in an Online UPS? [migrated]

I have a Farber 1KVA Online UPS that uses a pair of 12v, 9AH batteries that are connected in series. the power goes off a lot in my area and the batteries can't keep my PC on more than a minute during ...
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22 views

Is it possible to configure a Synology NAS to automatically power on after power is restored after a graceful shutdown?

This is the case: Power cuts off, UPS kicks in UPS battery is very low -> Synology NAS graceful shutdown initiated UPS is discharged, power is off Power comes back, UPS turns on the sockets ...
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31 views

Can I plug PoE injector between UPSed PoE switch and device to prevent it from drawing power from UPS during outage?

I have Linksys LGS116P which is 8 normal + 8 PoE Gbit switch. I am powering 5 cameras and 3 access points from it. Remaining 8 non-PoE ports are already used. Switch is plugged into UPS to keep ...
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23 views

APC Smart-UPS with two battery sets: Regular switches or not?

I have a Smart-UPS 1500RM in a remote location with two battery packs. In order to maximize the lifetime of the battery packs, is it better to Use one pack until it dies and then hope that the other ...
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1answer
38 views

Grounding of a server rack on wheels

I have a 42HE 19” server rack which houses a bunch of equipment (UPS, PDU, server, network, ...). It has wheels so it’s easy to move and it stands on a concrete floor. The rack is out of metal and ...
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1answer
42 views

Is it safe to unplug a UPS during operation? [duplicate]

Interestingly there is no word in the manual and nothing to be found on the internet. But it seems like an obvious question: While a UPS (let’s use APC Smart-UPS 1500RM as an example) drives equipment/...
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42 views

Best approach to gracefully shutdown several Synology NAS, Hyper-V VMs and one Windows Server 2019 using UPS

I'm currently stuck on coming up with the best solution to shut down several Synology NAS, one Windows Server 2019 and the several Hyper-V VMs running on said server in case of a power outage. We have ...
2
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1answer
524 views

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 (...
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3answers
110 views

UPS battery sulfuric acid fumes?

I'm confused. Why are UPS units installed in racks (usually in the bottom of the rack) with many thousand of dollars worth of servers; switches and other electronics with sulfuric acid fumes being ...
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1answer
76 views

How can i connect two parallel UPS that sharing the same load?

I have a critical load .I want to connect two parallel UPS that sharing the same output, how can i control them?? it's hard and danger to turn on both of them and synchronizing them. i want a ...
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1answer
369 views

APC SmartUPS suddenly all lights flashing. What's going on?

upsfault: I have a APC SmartUPS 2U 1500 somewhere in a rack far away. Batteries were replaced recently and UPS was working without issues for a long time. Suddenly yesterday, the entire equipment ...
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1answer
146 views

Configuring NUT for old serial connected UPS (Tripp-Lite)

I have an old Tripp-Lite UPS (SU2200RTXL2UA) which I need to communicate with via it's RS232 Port (this model doesn't have a USB port). I'm trying to figure out which Serial NUT driver would be most ...
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133 views

UPS and PDU options for NEMA L6-30P

I have to say I don't know enough about supplying power to a rack. So here goes: This is for a room that will host network equipment (and maybe a server), in an office. Room has: some 120VAC outlets; ...
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392 views

NUT and PowerWalker VI UPS - Driver failed to start (exit status=1)

I configured my UPS in the past using this guide. Generally, it was straightforward NUT configuration. Now, when I do upsdrvctl start, I get this: Network UPS Tools - UPS driver controller 2.6.4 ...
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59 views

NUT loses communications with the UPS

I am using NUT to monitor my UPS. I have a APC Back-UPS ES 550G, and the NUT server runs on a Raspberry Pi. I use the usbhid-ups driver, which works fine most of the time. However, after a few hours ...
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0answers
43 views

Newbie to Supermicro redundant PSU

Until recently I have never had a redundant PSU or a rack server for that matter. So, I think maybe I did this wrong? I have a Supermicro FatTwin 6026TT-HDTRF (CSE-827HD-R1400B case) that comes with a ...
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2answers
2k views

ZFS - enable or disable disk cache?

I'm setting up ZFS (through FreeNAS) with RAIDZ1 on a server with 4 x WD Red SATA HDDs (connected through a PERC H330 in HBA mode). The server is hooked to a UPS. For ZFS and in this setup, does it ...
3
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1answer
1k views

How can I fix my UPS repeatedly disconnecting and reconnecting?

I'm running a nut server connected to a Tripp Lite SMART1500LCD by USB. The device is behaving unexpectedly and I can see these kernel messages: user@host:~ $ dmesg -T [Wed Dec 4 13:24:24 2019] usb ...
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1answer
79 views

Is there a UPS like devices to prevent circuit breaks during short periods of high load?

For example, let's say I have a 10 amp circuit. Under normal load the hardware only draws 6 amps. However, it is possible that the hardware could draw up to 11 amps (for instance during boot). Is ...
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1answer
247 views

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 ...
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2answers
128 views

APC Smart-UPS 3000 turning off but passing own test

I have APC Smart-UPS 3000 at home which I got hand and apparently when the power goes down it just shuts down instead of switching to backup. Based on how it behaves I have reasons to believe is not ...
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50 views

Server Rack, Power Strips and UPS

I would like to get rid of all the messy power cords behind our server racks by using short power cords (1's and 2's) with multiple power strips connecting to two different UPSs on separated circuits. ...
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3answers
4k views

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....
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1answer
177 views

Starting servers after UPS shutdown when input power is restored

I have a rather simple UPS (Powerwalker VI series) that does not seem to have any sophisticated built-in configuration options. When the power is cut and servers detecting that event shut down after a ...
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0answers
251 views

Hyper-V Core Server 2019 ignoring power plan thresholds

I am attempting to tweak Hyper-V Core Server 2019 (host) power thresholds, however my attempts have failed so far. Scenario The newly created Hyper-V 2019 Server (part of Workgroup, not yet a Domain)...
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1answer
28 views

Save virtual memory in event of a power outage?

I believe my understanding of ram is that it holds the state of all programs for fast recall. On a short term basis. So my question is. Can you have a uninterruptible power supply that would send a ...
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1answer
92 views

Uninterruptable power supply with digital output designating mains/battery state

I want to have some equipment connected to a UPS to shut down gracefully when mains is cut. This equipment does not have capability to read serial or USB, so software solutions are out. What I'm ...
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2answers
170 views

UPS for HP ProLiant DL180 G6

I inherited HP ProLiant DL180 G6 model supposed TB used for some additional (non mission-critical) work and need to buy the UPS for it. I've read that PSUs for HP servers tolerate pretty much only the ...
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0answers
115 views

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 ...
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1answer
123 views

Redundant power solution in datacenter rack

We have two racks in a datacenter, currently powered by two independent sources. All devices are distributed across four different power extenders, and a few critical ones are first connected to a UPS ...
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1answer
3k views

MacOS nut client install for synology network ups

I have an APC UPS connected to my synology nas and I am trying to get my mac (10.13) to connect to the 'network ups' of synology. So far I've been trying to follow this guide: https://community....
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1answer
20 views

On boot, server pulls full load of both PSUs — any way to limit this or mitigate load spike?

I have a giant 24u server (Supermicro 4U X9DRI-F w/ 2x Xeon E5-2680) with 2 1200w PSUs. However, I only have 4 drives in right now, and my actual power draw (under the most stressful loads) is likely ...
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6answers
16k views

What are the pros and cons of having your own UPS attached to your own server hosted in a data center?

According to this comment by Tom O'Connor (slightly edited below): You can seriously cheese off a datacentre by putting an UPS inside your own rack. What are the risks to the data center should a ...
12
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1answer
215 views

datacenter UPS electronics/chassis expected lifetime

We have a small datacenter with seven APC 5000VA rackmount UPS. These have had regular battery replacement, but have just passed 10 years of service. We also have a boxed spare unit of the same model ...
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1answer
40 views

UPS + Bypass for a Server with Dual Power Adapter

We have a 600W APC UPS and a Server with two power adapters (each 800W). Originally, both power adapters were connected to the UPS, and the UPS connected to the power grid. Unfortunately the room ...
2
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1answer
3k views

Is it possible to use powerline adapters behind UPS's? [closed]

Currently i have my router connected in the 1st floor (with some switches), which is also connected with a 1200Mbps (real bandwith is about 600Mbps) powerline adapter. Another powerline adapter is in ...
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2answers
255 views

APC UPS replace battery illuminates [closed]

I have an APC SmartUPS 1000 for my servers. It was good for over 2 years, its capacity is always 5/5. One day I saw a red light illuminated. I searched for the reference it is either "Replace" ...
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1answer
65 views

What is the ideal Windows Update / backup device for a LAN with a slow metered internet connection

I was just in Kenya for several weeks helping some wildlife conservation orgs with their computers and IT. The biggest issue (aside from not enough funds to update tech as often as they should) is ...
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0answers
46 views

Is it impossible to accurately measure the health of a Lead-Acid UPS?

In a blog post from Schneider Electric (parent company of APC, the UPS manufacturer), they say that lead-acid UPS batteries "rely on chemistry that makes it hard to accurately predict when they’re ...
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0answers
101 views

apcupsd commok event fires where there was no commfailure

I have an openSUSE Tumbleweed host connected by USB to an APC Back-UPS NS1080G. For the most part everything works fine and apcupsd keeps track of the status. But lately every few weeks it fires the ...
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0answers
538 views

Socomec UPS no longer powers on after power failure

Some time ago I was bought a Socomec NETYS PR RT 1700 and a B2200 extender as payment for a job, intending to use it for a project that fell through sometime later. I started at a new job as IT ...
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1answer
151 views

How to find the battery type on a server UPS Socomec Mastery BC

I am in a situation where I have to change the UPS batteries of a Server and I cannot even find the type of the batteries that are compatible. Here is what I have tried until now: I have found the ...
2
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1answer
125 views

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 ...
3
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1answer
1k views

Should you occasionally discharge UPS to higher degree?

We're occasionally experiencing some short outages (few minutes at most or even seconds) so batteries in UPS almost never get below 90-80%. Is it advised to sometimes (eg. once half a year) perform ...
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3answers
158 views

Electricity outage killed 4 out of 6 UPS

We recently had an electricity outage of 1-2 seconds at one of our buildings. In this building we have 6 UPS and 4 of them died while/after the electricity outage and all the servers were powered off. ...
3
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1answer
567 views

UPS inside server room?

In my company we are considering to move our servers (some are mounted on 25U rack and some are tower servers) to a newly created room (underground, no windows) that contains 40 KVa UPS and redundant ...
2
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2answers
6k views

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 ...
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0answers
1k views

Network UPS Tools (NUT) causing UPS to Reboot?

I have NUT upsmon 2.7.2 installed on an OrangePi One running Armbian 5.25 (which is Debian jessie). It is setup to monitor my Tripp Lite SmartOnline SU3000RTXLCS2U using the usbhid-ups driver and ...
1
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1answer
113 views

Connect Intelligent Power Manager with EATON EDX2000H and WebPower SNMP Card II

We have an EATON EDX2000H, a WebPower SNMP Card II and I have just installed Intelligent Power Manager. I cannot make IPM to see the UPS as power source. It is greyed out (img 1). IPM sees the UPS ...
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1answer
512 views

GE Digital Energy UPS Monitor for Windows

I have a few GE Digital Energy Match Series UPS that beeps and shutdown seconds after startup and before output power is supplied. The batteries are at full capacity. So I searched a number of sites ...

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