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Questions tagged [electrical-power]

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

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

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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/openmediavault/sata_power.sh for i in…
henfri
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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? Screenshot of Power…
Alex Kous
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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. Usually it lasts on line or battery only a…
Walter
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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 of the total facility (i.e. facility power).…
Memes
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Why so much need for density?

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 with focus on density. I have trouble to understand…
Memes
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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 the server off. I have held the button for 30…
Ole Tange
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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 Kernel-Power Event 41 Error in event viewer. This…
Mike
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How can I remotely configure an XP computer to sleep after x minutes?

I need to configure all of our XP computers to sleep after a few hours of inactivity. Doing this from control panel is easy, but I'd like to avoid having to visit each desk individually. Is there any way to do this remotely?
user640
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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 to set this up, I only have a 15-amp circuit with…
matoro
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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 Gigabit Ethernet Controller PCIe Expansion…
Arst
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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 xxxxxxxxxxxxxx -u switch -x DES -X xxxxxxxxxxxxxx…
divB
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Is it safe to unplug a UPS during operation?

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/server, is it safe to disconnect the mains power…
divB
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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 on a standard 120 volt circuit. Given that…
TonyStark4ever
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changing cpu frequency dynamically depending on workload for power management

I have the cpu-usage profile of some standard benchmarks in which I can see the cpu-usage to be varying a lot . I wish to increase the cpu-frequency to the highest available value , exactly at the instants the cpu starts executing compute-intensive…
kashyapa
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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 running for a while, and the estimate has…
Jarmund
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