Skip to main content

Questions tagged [ups]

uninterruptible power supply

Filter by
Sorted by
Tagged with
0 votes
1 answer
35 views

Is it safe to put LiFePO4 in the server rack?

They make rack mounted LiFePO4 units like the 48V 100Ah Cloudenergy Store. Is it safe to put these units in the same rack with the server? Should they go to the bottom or the top? Are there any other ...
Evan Carroll's user avatar
  • 2,434
2 votes
1 answer
546 views

Replacement the UPS APC Smart-UPS SRT 10000 battery while it's powered on?

I have an APC Smart-UPS SRT 10000 and need to replace the battery. Would something bad happen if I replace it while it's still plugged in and powered on? Or do I need to shut down the servers and ...
Ahmad Altalla's user avatar
0 votes
3 answers
213 views

If I attach enough equipment to my UPS to exceed theoretical max amps but stay under the listed Watt Rating and VA Rating, how will that work out?

I have an APC BX1500M UPS rated at 900 W and 1500 VA. I want to attach three devices for a combined wattage of 816 Watts and a combined amperage of 8.1 Amps. Note: This total was determined from the ...
AnonymouseITManFromUS's user avatar
0 votes
1 answer
161 views

nut client configuration issue

There are 2 UPS NUT servers running in my rack. 1 is running on TrueNAS SCALE and another is running on Synology DS918+. And there is a NUT client running on a ubuntu server. The NUT client keeps ...
crackpot's user avatar
  • 101
0 votes
1 answer
130 views

GreenCell PowerProof 600VA UPS not taking mains power

I have a UPS that when on and plugged into mains power, continues to indicate no input power and running from battery. Is it a fault or user error?
J Collins's user avatar
  • 221
1 vote
0 answers
63 views

APC change to smart slot / card interface

I bought a new APC SMT1000C 1000VA UPS, which has the smart card interface on the back. I was planning to reuse my old AP9606 network card, but I discovered that APC has modified the slot to block ...
TSG's user avatar
  • 1,852
-1 votes
1 answer
40 views

How to test a battery outside a UPS [closed]

I have an APC Back-UPS 550 that is showing a replace battery alarm (alternating red/green flashing LED with constant tone). The battery registers 12.7 volts on a multimeter when disconnected from the ...
zenzic's user avatar
  • 119
1 vote
0 answers
862 views

UPS network shutdown for Synology and ESXi, USB UPS

I have had a USB UPS for a while now and although I've never had a power outage with it and my Synology NAS, in testing it's worked great connected just with USB to the NAS. Now I've added an ESXi ...
charlespick's user avatar
0 votes
1 answer
325 views

USB peripherals reconnecting and finally disconnecting when on battery power with CyberPower CP1500EPFCLCD UPS

The following happens with my brand new, fully charged CP1500EPFCLCD UPS by CyberPower if I cut power to it (with the home circuit breaker): After a few seconds, my USB mouse starts reconnecting (i.e. ...
Piedone's user avatar
  • 425
1 vote
1 answer
226 views

Splunk SNMP Modular Input

I just installed this app and found it simple to setup...but I most be doing something wrong. I've created Trap information on my two UPS devices and haven't had any luck bringing them into Splunk. I ...
YouSayHello's user avatar
0 votes
1 answer
689 views

replace APC smart signaling cable with RJ-45 to RJ-45

Is it possible to replace the APC Smart Signaling Cable PN: 940-1525A with an RJ-45 to RJ-45 cable? The cable is built as an RJ-50 to DB9, but I need to connect it to a console server that only uses ...
mcv110's user avatar
  • 1
1 vote
2 answers
2k views

Dell Powervault ME4 (ME4024): unattended shutdown possible?

I'm rather new in this world of SAN devices/ESXi hypervisors and stuff. Some years ago we had had physical servers with internal storage connected to a USB/LAN UPS and whenever he had a power loss we ...
carmik's user avatar
  • 173
-1 votes
1 answer
625 views

NUT slave powering off when master reboots

I have a homelab with the following setup: NAS (QNAP TS-453D) <─usb─ UPS (CyberPower VP1000ELCD) | ethernet └> Proxmox Server The NAS is the UPS master, configured to ...
Nemesis's user avatar
3 votes
2 answers
489 views

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 ...
mlevin77's user avatar
1 vote
1 answer
882 views

How to protect 15-amp circuit from UPS with 20/30-amp draw

I managed to pick up a great deal on a CyberPower OR2200LCDRT2U UPS. Unfortunately this box has a NEMA L5-30P input plug (NOT a L5-20P as specified on the product page). In the location I'm trying ...
matoro's user avatar
  • 41
19 votes
4 answers
4k views

Plugging in a server rack with UPSes into a room that has its own UPS backup issues

Thank you everyone who's responded. There's been a common theme in some of the responses that I wanted to clarify since I wasn't clear in my original post. This is an upgrade that will replace their ...
KazeEnji's user avatar
  • 190
1 vote
1 answer
776 views

Unplugged a working UPS by mistake. UPS made a bang noise and never turned on again

I unplugged my running UPS by mistake. The UPS was new so the batteries were fine, also the load was very low. Could it be that the breaking of the ground path lead to the destruction of the UPS? Now ...
Erli's user avatar
  • 13
1 vote
0 answers
38 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 ...
divB's user avatar
  • 570
1 vote
1 answer
960 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 ...
divB's user avatar
  • 570
0 votes
1 answer
1k 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/...
divB's user avatar
  • 570
2 votes
1 answer
6k 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 (...
Trayan Momkov's user avatar
-1 votes
3 answers
210 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 ...
bjr's user avatar
  • 1
-1 votes
1 answer
955 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 ...
Hamza Ahmed's user avatar
0 votes
1 answer
4k 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 ...
divB's user avatar
  • 570
0 votes
1 answer
666 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 ...
Jason O's user avatar
  • 159
1 vote
0 answers
364 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; ...
JDS's user avatar
  • 2,638
1 vote
0 answers
368 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 ...
petersohn's user avatar
  • 161
1 vote
1 answer
622 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 ...
Robert Wooden's user avatar
6 votes
4 answers
9k 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 ...
matthias_buehlmann's user avatar
6 votes
2 answers
7k 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 ...
Layne's user avatar
  • 101
0 votes
1 answer
389 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 ...
Patrick Lorio's user avatar
1 vote
1 answer
697 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 ...
GisMofx's user avatar
  • 121
0 votes
2 answers
1k 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 ...
sorin's user avatar
  • 8,266
0 votes
0 answers
160 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. ...
thebearot's user avatar
1 vote
3 answers
14k 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....
uski's user avatar
  • 21
0 votes
1 answer
849 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 ...
LetMeSOThat4U's user avatar
1 vote
0 answers
656 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)...
Riccardo's user avatar
  • 253
-1 votes
1 answer
35 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 ...
Alex Cunningham's user avatar
0 votes
1 answer
259 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 ...
Sean's user avatar
  • 235
0 votes
2 answers
251 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 ...
LetMeSOThat4U's user avatar
2 votes
0 answers
263 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 ...
Vallo's user avatar
  • 121
1 vote
1 answer
249 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 ...
Jax's user avatar
  • 11
0 votes
1 answer
6k 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....
Kevin V's user avatar
  • 111
-1 votes
1 answer
28 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 ...
Mike Manfrin's user avatar
51 votes
6 answers
17k 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 ...
JonathanDavidArndt's user avatar
12 votes
1 answer
300 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 ...
rmalayter's user avatar
  • 3,802
0 votes
1 answer
87 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 ...
kinnla's user avatar
  • 103
3 votes
1 answer
4k 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 ...
Essigwurst's user avatar
-2 votes
2 answers
423 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" ...
AkiEru's user avatar
  • 77
-2 votes
1 answer
75 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 ...
Dave C's user avatar
  • 105

1
2 3 4 5 6