Questions tagged [ups]
uninterruptible power supply
21
questions
34
votes
9
answers
26k
views
UPS and power strip interactions?
Sometimes I hear that you shouldn't plug (UPS brand X / any UPS) into (power strip brand X / any power strip) because of some interaction leading to poorly conditioned power, reduced battery life, ...
19
votes
10
answers
19k
views
Testing a UPS by unplugging it from the wall
At an Not For Profit/Charity I volunteer for occasionally we were very fortunate to be provided (donated) with a brand new 3Kva APC UPS. This is total overkill for our modest server rack (four mid-...
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 ...
17
votes
6
answers
22k
views
How to wake a server after UPS Shuts it down when Mains power is restored?
I have several Linux servers connected to APC UPSs. They are connected to the UPS via USB and configured to shutdown if the UPS sends a signal that mains power has been lost and has not returned after ...
15
votes
5
answers
3k
views
Is there any value in protecting both rack power feeds with their own UPS?
I've done some looking and have not found a satisfactory answer to this question.
When is it necessary or suggested to use an independent UPS (on it's own mains branch circuit) for each power feed to ...
56
votes
14
answers
2k
views
Is UPS worthwhile for non-production equipment? [closed]
Over the years, I've had to throw away a quite a few bits of computing equipment (and the like):
Several ADSL routers with odd symptoms (losing wireless connections, losing wired connections, DHCP ...
16
votes
3
answers
24k
views
What is the difference between a PDU and a power strip (both 120V, 15A)?
I just chatted with an APC rep about upgrading the UPSes at our office. She recommended a single higher-capacity 6-outlet Smart-UPS to replace the four Back-UPS units we currently have. When I asked ...
8
votes
3
answers
20k
views
Automatic power on after graceful shutdown on UPS
This is my basic setup:
I run a server (DL380 G7; linux 3.13 kernel) that is host to ~10 virtual machines
It is set for automatic power on
I use NUT for UPS management
Graceful shutdown duration of ...
6
votes
4
answers
8k
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 ...
6
votes
5
answers
11k
views
APC Smart-UPS: remote power shutoff?
Given:
A server room containing about two dozen rackmount servers and a PBX.
About a dozen APC Smart-UPS 2200s providing power to this equipment.
A fire suppression project requiring immediate ...
5
votes
2
answers
10k
views
How to properly shutdown ESXi cluster after power outage?
I am integrating UPS EATON with our ESXi 4.1 cluster. Eaton provides shutdown script for one particular ESXi host (shutdownESXi.pl) The problem was, after manual execution of shutdownESXi.pl script on ...
4
votes
2
answers
263
views
Does the additional load on UPS in case of grid failure amount to 100%?
The scenario is as follows: Servers are equipped with two PSU's each. One of these is connected to the UPS, the other one directly to the power grid (bypassing the UPS).
I would assume that since the ...
4
votes
6
answers
15k
views
UPS with a HP Proliant server
We placed a EATON Ellipse Max 1500 (900W) as the UPS for our HP Proliant ML350 G6. Upon first power failure (actually we only moved the UPS' input plug to a different socket), server immediatelly ...
3
votes
2
answers
5k
views
How to disable UPS energy_saving with NUT?
I've got a Proline 650 UPS (Serial) installed
Extra details: The UPS has a serial connection with a single 12v SLA battery. (It was not listed in the NUT compatibility list but after compiling NUT-...
3
votes
4
answers
2k
views
Smart UPS 2200 question
I have a smart UPS 2200 that is giving me problems, I suspect that the batteries need to be replaced, but I am not sure. There are no visible problems, ie. no error codes, no error lights etc, but ...
3
votes
8
answers
632
views
Anti surge protection
Great site - my first posting!
I support a number of small business for all things computing. I protect the servers with APC Smart-UPS 1000. The do just what they were bought to do.
However, I dont ...
2
votes
3
answers
10k
views
Hyper-V 2012 gracefully shutdown when UPS battery running out
Background:
We're running a couple of Virtual servers in Hyper-V at a small office using Windows 2008 R2.
We only have 1 physical host (and we aren't planning to change that any time soon). We're ...
1
vote
3
answers
13k
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....
1
vote
5
answers
7k
views
Configuring power outage shutdown via APC UPS's
I've got 2 APC Smart UPS 3000's, one of which has the management card (AP9617). They're both currently being used purely for battery backup, and since we've had repeated power issues in this building,...
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 ...
-9
votes
5
answers
263
views
server migration in data center help & suggestions [closed]
We have about 15 Windows 2003 and 2008 servers at our data center, which host hundreds of different sites and databases. We have to move them to a new rack from 5th floor to 3rd floor. This move ...