Questions tagged [electrical-power]

Power is required for all our servers, desktops, and other electronic devices to operate.

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How to upgrade APC Rack PDU?

I have an APC Rack PDU AP7920 (hardware revision B2, manufactured 07/21/2012). When I log in via telnet I get: American Power Conversion Network Management Card AOS v3.3.4 ...
divB's user avatar
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HP Proliant ML350 G6 Power backplane diagonsis

I get no lights at all. I am looking for some sort of testing procedure on the board level as I am not sure if the issue IS power plane related, or if it is just a bad main board. the power supply ...
HOLLiiWOOD's user avatar
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1 answer
169 views

SGI Rackable Systems server, what type of power connector

I purchased a used "Rackable Systems" server off eBay and I discovered to my surprise when it arrived it has power connectors which appear to require ~48 volts DC input. It looks like this: What ...
bgp's user avatar
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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 ...
jackie1100's user avatar
2 votes
3 answers
352 views

What functionality does smartd lose when disabling state saving or attribute logging?

I'm trying to let my backup server have its disks in standby as often as possible. Outside of smartd or actual backup usage, the disks currently spin up once per day (various cron tasks). smartd, by ...
Tomas Creemers's user avatar
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192 views

NetApp filer uses more amps when one power supply is turned off

We have two old NetApp FAS3050 filers at our colo. We also have an upcoming maintenance window that will take our circuits offline for an extended period of time. Our circuits are pretty much maxed ...
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Command-line CPU frequency scaling?

How to configure Ubuntu 12.04 Server to dynamically adjust CPU frequency during quiet times? I've found a set of instructions at http://ubuntuforums.org/showthread.php?t=944190, suggesting to add ...
OJW's user avatar
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MGE UPS Cut power - What happened?

I have 3 x MGE Pulsar M 3000 2700w UPS units within my server room which have run perfectly up until now. On Saturday morning I noticed that one of these UPS units was no longer outputting power, ...
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Linux soft RAID5 does not come up after multiple power failures on some discs, what to do?

I have a backup of all important data. At the end a restore is needed. But I want to first try something before I would go this way and it is a good situation to learn something about all the stuff I ...
ljsdflkjsldfjlsf's user avatar
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Using (dual) ATS for dual PSU server?

There's two parts to my question: Does it make sense to hook up a dual PSU server to an ATS to speed up failover to the secondary circuit? If yes, does it make sense to use two separate ATSes to ...
elleciel's user avatar
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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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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
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55 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 ...
Travis's user avatar
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ASUS server power troubles, not turning out, on and off. Etc

So, I live in a country where power isn't exactly reliable (210vac usually, with almost constant changes) and I am working with a school that doesn't exactly have a large budget (yet, still growing ...
Asher's user avatar
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1 answer
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Windows Server 2012 after power outage

Had a power outage, server restarted normally. Server is a database server for a hotel, which is connected to an ISP with optic fibre. On the restart, network went public, instead of the default ...
user3726760's user avatar
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HP UPS T1500 G3 intermittent buck switching

We have a HP T1500 G3 UPS which we noticed does several short switches to battery quite often during the day, every day. Nothing ever gets reported to its log (i.e. HP Power Protector Notifications), ...
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How do I power this SAN safely and with redundancy on the power circuits?

Location: USA We are looking at powering a new Storage Area Network (VNXe3200). There are 10 units in total, each with two power supplies for redundancy. Assuming we can do either single-phase 120V ...
Daniel Wyatt's user avatar
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181 views

SLURM power saving features

For those who have used SLURM resource manager, have you used the power saving features to lower your cluster's energy usage? Has anyone found that power saving lowered their electricity bills? Did ...
Will Stedden's user avatar
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181 views

PowerChute with ESX - how to start the VMs

I have a setup with a couple of ESX servers and two APC UPS. The ESX servers are govern by vCenter and I've deployed vMA (provided by VMWare VM) on one of the ESX hosts and configure it to target both ...
hovanessyan's user avatar
1 vote
1 answer
390 views

Surge Protector for PDU and Servers

I am going to be attaching my gear in this order: 20 amp outlet => Surge Protector => PDU => servers. My current PDU says in the manual "does not provide surge or line noise protection". I have been ...
invulnarable27's user avatar
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1 answer
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iDRAC 6 Power Monitoring Not displaying

I recently bought a Dell R210ii with a iDRAC6 Enterprise card installed. Everything seems to be fine except there is no mention of power monitoring on the iDRAC website, only voltage status. ...
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apcupsd not working properly on centos 5

I have APC UPS and my servers are directly connected to it using power cable. I want to use network link to shutdown servers when ups goes on batter. the following is my config file. ## apcupsd.conf ...
shorif2000's user avatar
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984 views

Error in AIX : 0516-040 : Unable to read the specified physical volume

Please provide me your valuable suggestions on the error beow in AIX. When I'm running the following command on the AIX server lsvg -l rootvg I'm getting this error: 0516-040 : Unable to read the ...
Saifu's user avatar
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power monitoring capabilities of ibm x3550 m4

I don't understand how monitoring of power consumption of x series servers is done with IBM AEM - I'm specifically interested in x3550 m4. The documentation on the servers does not really highlight ...
Sean M's user avatar
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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 change....
ndespres's user avatar
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3 answers
405 views

Surge Protection for Servers not Connected to UPS

For servers or network switches not protected by UPS, is there any product to guard against power surges / spikes? Power conditioners available seem to be for home /audio video usage. Was looking at ...
BOBA_FETT_81's user avatar
1 vote
2 answers
1k views

No cpufreq sub-directory in one of the nodes in our cluster

How do you change the governor from Ondemand to something else ?
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who is setting my link_power_management_policy?

I am experiencing issues with my sata connection. Thus, I want to change /sys/class/scsi_host/host*/link_power_management_policy to max_performance. For that, I execute on boot a script: cat /etc/...
henfri's user avatar
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396 views

Server experiencing Kernel-Power Event 41, but only once every two weeks

I go to check on a client's servers once every two weeks as part of an IT contract. For the past month and a half, their secondary server will experience a sudden shutdown and generate the Critical ...
Mike's user avatar
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1k views

Switching APC rack PDU via SNMP

How can I switch the outlets of an APC Rack PDU (AP7920) via SNMP (Linux SNMP command tools like snmpget/snmpset) ? I can't find anything about it. I was able to walk it via: snmpwalk -v3 -a MD5 -A ...
divB's user avatar
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148 views

MegaRaid and power failures

I have a server that is currently working on migrating a RAID setup. There are 36 drives connected to an AVAGO 3108 MegaRAID, and as of this moment, the estimated time remaining is ~13 days. It's been ...
Jarmund's user avatar
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0 answers
197 views

Step up voltage converter in datacenter?

I am setting up a rack in the data center that only has 110V. It is redundant, so I thought I could take one from each leg and get 110V, but when I used a voltmeter last night they somehow are on the ...
Alan's user avatar
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1 answer
406 views

Can a Vertical PDU be mounted in an enclosed rack?

I purchased an enclosed 12U rack as well as Vertical (0U) PDU, but can't figure out how to mount it in the rack vertically. I assume I need to mount it on the side posts of the enclosure, since, if I ...
SRobertJames's user avatar
0 votes
2 answers
2k views

HP ML350 G6 will not power on

I have no lights on MB or back of power supply. I have replaced power supply and added a redundant power supply. I replaced PD board or backplane whatever you want to call it. Still same result. ...
David Dennis's user avatar
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0 answers
153 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
0 votes
1 answer
478 views

Does IPMI-DCMI power consumption include GPU?

I'm using FreeIPMI to measure power consumption with --get-system-power-statistics on servers which contain GPUs. Will the returned power consumption in watts include that of the GPUs? The ...
user540985's user avatar
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0 answers
162 views

How to test server's peak draw on electrical amperage?

I'm moving my server to a co-location center and they'r not concerned with the actual wattage, which is what I've tracked, but they are very concerned with the peak amperage. They charge by the amps ...
Altimus Prime's user avatar
0 votes
1 answer
250 views

Step-Down 400/230V to 120V without a stepdown transformer

At my current data center, 400/230V is delivered to the racks. Is their any way I could step this down to 120V without a transformer? I'm trying to see if maybe there is a PDU that exists that can do ...
Martin Fi's user avatar
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0 answers
62 views

Debug sudden shutdowns

I have two (new)workstations showing weird symptoms: they randomly power off without any sort of warning or delay,... They just may or may not power off at any given time and reboot after that. The ...
rudib's user avatar
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1 answer
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Need help diagnosing dell c6100 - No POST

Hi Server Fault Community, I have 2 nodes in my dell c6100 that are not POSTing, it's the top two nodes (1 & 3). The bottom 2 DO turn on (2 & 4). I need some help identifying which part I ...
italiansoda's user avatar
0 votes
0 answers
406 views

Optiplex 980 are turning on after power loss - how to disable

We have 24 computers from Dell (Optiplex 980) and there is often a power outage here, a few times a day. It is a small school in a poor country with no stable electricity system. After the power ...
Andreas Remdt's user avatar
0 votes
1 answer
117 views

Windows Server with RAID error message after power outage - not booting

Good afternoon, We had a power outage last week at one of our remote sites which brought down the entire server room. Most of the systems came back online after the outage was resolved, but we have ...
zwoodcock's user avatar
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0 answers
355 views

system randomly powers off

I've got an HP MicroServer N54L running Linux Mint 17.2 (fresh install). Every few days, I find the machine in a powered-off state (standby, actually - not in the sense that it went to sleep, but in ...
meeotch's user avatar
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0 answers
84 views

APC Power Controllers Inaccessible After Brief Power Loss

It seems like every time there is a brief power outage in our environment (1-2 second blip). There are generally a handful of APC power controllers that become inaccessible through network. The ...
cheesesticksricepuck's user avatar
0 votes
1 answer
16 views

Matching time to system event

I have a file server running Ubuntu 12. I have recently installed noflushd to spin-down unused hard drives in an effort to extend their life. I am noticing that every morning at the same time (07:36)...
jimmyjambles's user avatar
0 votes
1 answer
406 views

Looking for a basic auto-ping power watchdog for my flaky server

My home Mac Mini server keeps locking up, and I was looking into a switch to automatically cycle the power when it stops responding to pings. Is there a simpler/cheaper alternative that devices like ...
xan's user avatar
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0 votes
1 answer
1k views

APC PowerChute management

I have 3 server with their Smart-UPS connected by USB cable. I downloaded PowerChute B.E. to manage ups. If I well understand PowerChute usage, I have to install an agent for each server and on unique ...
Tobia's user avatar
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-1 votes
2 answers
53 views

Power server when power is on (No Bios access)

I have 3 servers and one is old hardware. I have frequent power outage due a Kw limit. I know there is an option in the BIOS to power on a machine when there is power. 2 servers does have this AC ...
BeGreen's user avatar
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-1 votes
1 answer
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How can I make a server or PC use the most electrical power it is ever likely to?

I have several servers connected to a UPS. I would like to try and get those servers to draw the most power they are likely to as a load test of the UPS. What is the best way to cause a server or PC ...
TafT's user avatar
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-2 votes
1 answer
2k views

How do I get the power consumption of a Dell PowerVault on the CLI?

How do I measure the power usage of a Dell PowerVault storage device from the command line of the attached server?
Onnonymous's user avatar
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