Questions tagged [electrical-power]
Power is required for all our servers, desktops, and other electronic devices to operate.
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Dell XPS not starting [migrated]
I got a Dell XPS laptop. The computer has been off for a while and today I decided to find a new use for it however it didn't turn on.
I have charged it with the power cord and with the USB-C via the ...
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1
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Hp proliant Dl380p gen 8 power issue
Hi my hp proliant dl380p gen 8 sometimes lunches into the hp loading screen then shuts off other times it doesn't get to loading screen and just try's to start up you can hear it and see it send power ...
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VMware Virtual Machine Power Consumption
I know there is a way to view the power consumption in Watts for a specific VM, but is there a way to view or output the total power consumption for a set of VMs over a given period?
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Server crashing every 14 days, no bugcheck
Every 14 days one of our Windows servers crashes. We have been trying to figure out what causes this but to no avail.
Today we noticed a pattern in the shutdowns of the server, happening every 14 days ...
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Is there any Linux mechanism to emergency-flush filesystem buffers on power loss?
A common "gotcha" with computers can happen when power gets cut to the computer without warning. Because the system loses power suddenly, it doesn't have a chance to flush cached filesystem ...
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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/...
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DL380 iLO not displaying power usage
I have a DL380 Gen 7 and when I log into iLO, the power tab says 0 watts. I've tried restarting multiple times. The weird thing is that HWInfo says that I use 100-200 watts. Can someone explain this?
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Determine root cause of waveform issue on UPS
I have a WattBox UPS 1100VA (WB-OVRC-UPS-1100-1) that can, seemingly randomly, rapidly alternate between line power and battery. When it flips to battery it will give a reading on the LCD around 25V. ...
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What is considered in the PUE calculation?
Looking into PUE calculation for a small datacenter, I have here some questions :
With standard air-cooled servers, it is simple, get the power draw of the servers (i.e. IT power), get the power draw ...
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Why so much need for density? [closed]
In today's world, we are looking everywhere for power savings. In the datacenter environment, I see more and more focus on the power efficiency, yet, I also see that the servers keep on being made ...
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Dell R815 power button does not turn off
I have powered my R815 on/off using DRAC. That works fine.
But today I had some physical maintenance, and wanted to use the power button. I can turn on the server using the button, but I cannot turn ...
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"hdparm -s 1" on USB disk -> bricked? - USB drive is on power on in standby mode which cannot be reverted with hdparm
I have a disk which was apparently put into PUIS mode with hdparm.
As the disk does not spin up on power on automatically, I think I need to send it directly to the USB device (which is not even ...
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Reducing power usage on windows server
I have a Proliant Microserver Gen8 running windows server 2019 with a Xeon E3 1260L, one SSD for OS, and two 3TB 5400 RPM disks for storage (software raid).
The server acts as a NAS and has a few ...
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Power limit in a 2x1600W server
I have a server with two 1600W power supply units (a Gigabyte GS-R22PHL if that helps).
Should I assume the maximum rated power is 1600W, and that the second unit is for redundancy, or that the ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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Is it possible to coonect the power to the sata power slot on a PCIE card from HPE ProLiant DL360p Gen8 server?
This is my first server and I never had one before...
I recently need to use USB 3.0 for external HDD but there is none on this server, all USB 2.0. So I bought a "3 Ports USB 3.0 with 1Gbps ...
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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 ...
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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 ...
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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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Can I safely run a server with redundant power supplies off of a standard 15 amp outlet?
I purchased a used HP Proliant DL380p Gen 8 off eBay. It has dual redundant power supplies, both at 750 watts. Doing the math, I realize that if both PSUs are at peak load, they will pull 12.5 amps ...
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ZFS data lost after a rollback happening on reboot
Edit1:
Unlike what I originally thought when creating this question, it seems that the problem was NOT directly caused by the unplanned power-cycle, but by a mistake I might have done with beadm in ...
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Did HP ever advise splitting receptacles for redundant power?
As you know, some servers use redundant power supplies; they advise putting the two power supplies on independent circuits so a breaker trip won't down the server.
Common North American 120V ...
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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 ...
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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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How to estimate how much power my dual Xeon server would draw?
I'm planing to place a rack server into a colocation, but given that I'm on a tight budget, I try to estimate the total cost of ownership of the server. The data center where I will rent the ...
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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 ...
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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 ...
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How to secure this power cable on a network switch?
The device is an HP EI A5120 network switch. Is there a way to secure this power cable? Some other devices you can use a zip tie on these tabs. I searched but did not find a retention bracket from HP.
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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 ...
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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. ...
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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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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 ...
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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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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 ...
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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 ...
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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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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 ...
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Make an old server more power efficient - HP DL380 G7 [closed]
i recently picked on ebay an old HP DL380 G7, i think it was a great deal, lots of disk space and a very low price, for what I need, it was a great deal.
These are the specs:
CPU: 2 x INTEL XEON ...
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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 ...
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How to gracefully shut a computer down with a wall mounted light switch
I am sysadmin and my company has tasked me with a project I am not quite certain how to complete.
A local museum has a small Intel NUC-like computer running Windows 10 that displays an automated ...
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Is it possible to run HP DL580 G5 on just 2 processors and 2PSUs?
So I just acquired a HP DL580 G5 server with the following config :
4X 6 core Xeon 7450 2.4GHz processors
128 GB RAM
6 X 72GB SAS drives 15K
I noticed that it requires at least 3 power inputs to ...
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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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Exascale Power Consumption
I have read a lot of articles about exascale and found out that it may consumes approximately 20MW power envelope. Is it a daily basis or a yearly basis or every second?
Please enlighten me.
Here are ...
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Is there a way to protect SSD from corruption due to power loss?
We have a group of consumer terminals that have Linux, a local web server, and PostgreSQL installed. We are getting field reports of machines with problems and upon investigation it seems as if there ...
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Does it make sense to connect a redundant power supply to a C14 splitter?
Recently visiting a small data room, I noticed that redundant power supplies of a server are connected through a C14 splitter which, in turn, is connected to a single socket of a UPS.
I told the ...
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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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