The power tag has no wiki summary.
0
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1answer
43 views
Metered-By-Outlet-Monitoring PDU [closed]
I see APC offers Metered-By-Outlet PDUs, however they only offer 30A - 32A 208V PDUs. (URL: http://www.apc.com/products/family/?id=478)
We are looking for a 16A 120V PDU that offers power usage ...
0
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0answers
20 views
IPMITool - DCMI Power Usage is Null?
On my server, I am using IPMITool, and trying to get power usage via DCMI.
When running this command:
[root@server ~]# ipmi-dcmi --get-dcmi-capability-info
I have this result (part of the ...
0
votes
5answers
93 views
interference between redundant power supplies
I have a number of dell servers and two UPS. I plan to give two different input to servers from two different UPS, my question is:
A short circuit of redundant powersupply unit (PSU1) will trip one ...
1
vote
3answers
90 views
Power Usage via IPMI or BIOS or?
Is it possible to check the power usage of an entire machine via IPMI, BIOS, or any other option? I have done some searching but no results have came up yet.
PDUs only show the total usage, so this ...
2
votes
1answer
31 views
Power surge protection on office LAN, medium-small scale
I've got an office LAN setup with about 15 computers, which is due to expand to 30 before long. Each computer is on its own voltage stabilizer and UPS.
I live in a place with horrible, substandard, ...
3
votes
2answers
60 views
Wattage Per Square Feet as a Measurement
I am used to looking at collocation providers where in U.S. are given as AMPs per rack (assuming 120V). I am looking into a place that rents space for servers which is listed as:
"250 Watts per ...
5
votes
4answers
282 views
When do I need to consider 3 phase power? [closed]
Ok, I'm trying my best not to make this too subjective and provide all the information I can and if you can help make this a better question then please suggest.
My friend an I have a small software ...
4
votes
3answers
88 views
How to properly configure power redundancy for devices with only one power input?
Some devices, such as servers and high-end switches have dual PSUs/power inputs, which can then be hooked up to separate UPSes, which are hooked up to separate power circuits (correct so far, right?).
...
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0answers
47 views
Upgrading memory on an IBM Power 710 Express (8231-E2B)
We have a Power 710 Express server that was loaded with 4x4 GB memory on a single riser card. I have replaced the 4 chips with 4x8GB and put in another riser card and loaded it with 4x8GB more for a ...
0
votes
3answers
151 views
Rackspace - typical power for a server
I'm trying to get some rackspace and buy an appropriate server. I've got a quote for 1/4 cabinet which includes 0.5kw of power. How do I know how much power my server will use...(e.g. I've looked on ...
5
votes
1answer
76 views
Using Y split cables to connect two servers to a single PDU receptacle
We have bought a few 30amp 208v PDUs that only have 9 receptacles. The servers we are connecting to those PDUs will not use the full 30amps (at 80%, or actually 40% since we use redundant power) so we ...
12
votes
4answers
566 views
Hooking up many different external HDs simultaneously
I need a large amount of external storage for an upcoming project. I'm planning on purchasing 10 2TB external drives. I need them all hooked up to a single machine at the same time. What issues ...
8
votes
2answers
239 views
How to check CentOS 6 Server VM Host after a power falure?
This afternoon, someone at our office decided to pull the plug out of our server because it was storming outside. They didn't shut it down, they just pulled the plug out while it was running.
The ...
-2
votes
1answer
35 views
Disks online through power pull, replace? [closed]
Suppose you had a server cabinet and the power was pulled on the whole thing (this just happened to us).
Now suppose you had a hard drive (3.5" SATA WD Enterprise) that was not previously in use. It ...
0
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0answers
49 views
APC switched PDU rack, lost state after reboot or power loss
I have the following:
We have a few APC 7920 PDU's
Using POWER IQ to control the PDS's via SNAMP 1/2
Using also Mobile Power IQ to control the PDU if need via iPad/iPhone
I am in the process of ...
1
vote
2answers
101 views
Virtual machine lost after power cut
We have just had a power issue and our ESX (ESXi 4.1.0) host lost power and then rebooted. All but one of the virtual servers have rebooted with no problem, however one of them refused to power up.
I ...
7
votes
2answers
262 views
Green-IT: How do you deal with poweroff systems in your system monitoring?
Many of you probably have completed or are contemplating Green-IT projects with the goal to power off idle or unneeded systems when demand for computer resources is low:
How you did handle this ...
4
votes
2answers
133 views
Does unbalanced load on three-phase UPS use more power and cost more?
We have a three-phase online data center UPS.
Someone said recently that if the input amperage across the phases were 70-10-10 we'd pay for the kWh represented by 70 amps, but if the same load were ...
0
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0answers
82 views
IBM System x-3550 m2 won't start
I have a system x-3550 that won't start. It is in the process of being rebuilt as an Exchange server, so it wasn't in production yet, and while I was on leave it got turned off (properly I might add, ...
11
votes
5answers
344 views
Why is it important to ensure equipment is well-grounded?
I am installing a new ethernet switch, and the instructions say to connect the ground screw to the rack or some other kind of electrical ground. What are the risks of not ensuring that equipment is ...
1
vote
2answers
158 views
How to measure server power consumption?
We have data center running more than 2000 servers. We are planning to shutdown the servers on a weekend for cost cutting purpose. How can we calculate which servers are consuming more power in the ...
0
votes
2answers
950 views
Windows 2008 Server R2 turns itself off
I have a Windows 2008 R2 Server that switchs off on his own. and it does not look like a hardware problem since I can see in the log how all services are stopped and after:
Log Name: System
...
1
vote
1answer
60 views
How much power draws a system like this idling in BIOS? [closed]
Let's assume a generic system like this:
Two modern multi-core CPUs, like a Xeon Dual Core
2x 7120M, 3.00 GHz, 95 W power dissipation each, according to Wikipedia
2x 835Watt PSU (redundant)
8GB RAM
...
10
votes
2answers
193 views
Using 48v for servers
I'm currently in the middle of a process to specify and design a new server environment for graphics and video rendering.
We know we want to use blades, and we're pretty sure of our vendor decisions. ...
3
votes
5answers
180 views
A plan to mitigate PDU failures?
A client just experienced a complete failure of an APC AP7911A switched/metered rack power distribution unit. This obviously took all of the connected equipment down with it. The equipment is fine, as ...
1
vote
3answers
68 views
USB Legacy support burning PSU, is it possible? [closed]
So one day, the PSU in the machine I was working with decided to blow up. Yes, I heard a pop, and a strong burnt smell.
So what happened? What caused it? How can I prevent it?
The situation:
The ...
0
votes
1answer
45 views
How does a server power supply withstand unto toggling the power?
My server will run only weekly for 2 hours for backup purposes. After I finished the backuping I pull out the power plug from the power outlet.
How does a server power supply withstand unto toggling ...
2
votes
1answer
130 views
What is the proper power cord for the usual rackmount server?
I'm trying to clean up a rackmount power environment, and wanted to check on the power cords. Currently, it seems that what I would consider to be appropriate are labeled mostly as 14AWG:
14AWGX3C
...
0
votes
1answer
106 views
How to put laptop to sleep with powershell/vbs/wmi/…?
I'd like to be able to put my laptop to sleep from the command line. According to Microsoft, the Win32_Battery WMI class has a SetPowerState method that looks like it should be able to do this, ...
1
vote
1answer
82 views
Monitoring power usage (AMPs/kWh)
Sorry if this is too near 'shopping' but after much Googling I've not really found any decent solutions.
What I'd like to do is monitor the power usage, particularly AMPs and kWh/day used by a plug ...
5
votes
4answers
326 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 ...
2
votes
1answer
82 views
PDU With Configurable AMP Limit
I have a 20 AMP/120V circuit. The only device plugged into this circuit is a 1000 Watt Dell UPS. Right now several devices plug directly into the 1000 Watt UPS.
I wanted to order a PDU to help ...
10
votes
3answers
288 views
Should pcs be unplugged before restoring power
We have an upcoming scheduled power outage for maintenance.
UPS protects our servers. But it has been suggested that all PCs should be unplugged to prevent damage from power surges when power is ...
2
votes
2answers
93 views
A/B Power Configuration for Server Cabinet
I'm upgrading our cabinet at our colocation for A/B power and wanted input on which of our options are good or bad.
First, a bit of an overview of our setup: We currently have a single circuit feed ...
0
votes
1answer
102 views
Server/Power supply AMP usage
I've been looking into getting some servers with co-location, I've worked with co-lo'd servers before but this is the first time I've actually a rack up.
All co-lo' providers specify a limit on the ...
2
votes
2answers
160 views
Power reading 2 amps with 13 servers?
We have a rack in a data center and we became suspicious of running out of power.
But our power bar says 2 amps! It has a live indicator, so it's not just one reading. Do you think there's something ...
1
vote
1answer
121 views
Actions to take during/after a power outage
We're in the process of replacing the shelving in our server room, and I found a piece of paper that had been covered over which lists various actions to take during/after a power outage:
ADSL modem ...
2
votes
2answers
534 views
APC Smart-UPS Amps - How many amps does it use all by itself?
APC Smart-UPS XL 3000
http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=su3000rmxl3u&tab=models
I have two of these APC units. They use NEMA L5-30P electrical plugs.
I'm ...
1
vote
3answers
265 views
Is it possible to use mixed 110V / 208V power on a single server with dual power supplies?
Is it possible to run a dual power supply server with one PS plugged into 110V, and the other power supply plugged into 208V? We've asked the vendors and they say they've never tested it or some other ...
-1
votes
7answers
246 views
How can I power down my server when the mains power plug is pulled out?
I have a server (Dell R310) running which has a main power cable (long) connected to power(in the wall). Anyone who is bored will pull out that cable (Train station/Airport/ Public zone) and server ...
0
votes
1answer
207 views
Running IBM servers at both 110v and 220v at the same time for a few seconds for power migration?
In our data center we are going to be moving all of our dual power supplied IBM servers (auto sensing 110/220) from an outdated 110 system of dumb power strips to an updated in rack 0u 220 monitored ...
0
votes
2answers
983 views
Powertop reports “Bad” “Runtime PM for PCI Device”
I've noticed that powertop utility reports "Bad" "Runtime PM for PCI Device" for several devices. Seems that powertop can fix the issue but it won't tell what exactly it does to fix it. What should I ...
28
votes
5answers
862 views
How to build and run a machine room?
The last guy quit (I think a lot of adventures begin this way?) and I've been given the job to build a new machine room. I am coordinating with 2 engineers, campus ITS, campus Facilities Management, ...
9
votes
4answers
279 views
Proper Sizing for PDU's/Power in Rack
I've struggled with sizing my power sources and associated PDU's in my server racks. Somehow I feel like I'm way oversizing things based on nameplate requirements on power supplies.
My simplistic ...
21
votes
5answers
2k views
Best practices for power cabling racks in DC
With network cables it is easy. I use velcro-ties, coloured cables, 0U vertical cable organizers from APC on side of the rack -- easy and neat.
However with power cables it was always giving me ...
0
votes
3answers
65 views
ups and an unconfigured server
Say I have got a big room loaded with servers and a big cupboard size battery as a ups. Now the electricity fails. Is there some way for the servers to know that they should shutdown? Does the ups ...
1
vote
0answers
368 views
EventID 4098 : Group Policy Power Options gets Access Denied when applying a power scheme
I created a Group Policy Preference on my Server 2008 R2 DC to Update the Always On power scheme and make that the Active Scheme.
I see the GPO apply in GPResult but the power settings do not ...
2
votes
1answer
81 views
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 ...
1
vote
2answers
137 views
Is this an NEMA L6-30R Plug?
My employer just bought a building with a decent server room. Before I go out and spend some money on a UPS, I want to confirm that this is actually an NEMA L6-30R (sorry for the poor image). I've ...
1
vote
5answers
533 views
Which is better for heat: 120v or 220v?
I've got the following gear in a small 120sqft room. While AC is supplied it's a home/office and in the summer both the central air at full go and a standup indoor portable AC on full barely keep it ...
