Questions tagged [electrical-power]

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

Filter by
Sorted by
Tagged with
-4 votes
0 answers
15 views

HP G6 proliant ML-370 power up issue

I have three HP g6 server on my room. after power failure and ups battery full discharge all server went down. After city power was reestablished two server were ok and one server was problematic. It ...
user avatar
-2 votes
0 answers
14 views

Dell t620 dc power supply wiring

I recently got a poweredge t620 from my last job, was bound for the trash and it works great for my home lab. I'm wanting to go solar with battery backup and power some other things with the panels as ...
user avatar
0 votes
0 answers
9 views

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 ...
user avatar
  • 368
0 votes
0 answers
10 views

UPS beeps once when server is connected to it

When I connect the server power cable to UPS it beeps once as if there is overload. Afterward the server turns on normally without any problem. This happens randomly every time I turn on the UPS or ...
user avatar
0 votes
0 answers
12 views

CyberPower UPS: What does "Line Interaction... None" mean?

I've got a CyberPower VP700EILCD UPS connected to a Linux box. When I run pwrstat -status, I see (amongst other things): Line Interaction............. None What does that mean, exactly? I assume it ...
user avatar
0 votes
1 answer
51 views

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 ...
user avatar
  • 368
0 votes
1 answer
26 views

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 ...
user avatar
  • 2,756
0 votes
1 answer
87 views

"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 ...
user avatar
  • 3
-1 votes
1 answer
76 views

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 ...
user avatar
  • 259
-2 votes
2 answers
42 views

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 ...
user avatar
  • 187
0 votes
0 answers
49 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 ...
user avatar
  • 1
2 votes
2 answers
84 views

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 ...
user avatar
0 votes
0 answers
19 views

Poweredge R930 OOW and unable to boot entire server

I am facing this issue at our client server room. Scenario: 1-server r930 failed to boot eventhou level one diagnosis have been tried. For instance, drain server static electricity by unplug powercord,...
user avatar
0 votes
1 answer
106 views

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 ...
user avatar
  • 31
1 vote
0 answers
33 views

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 ...
user avatar
  • 379
19 votes
4 answers
3k views

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 ...
user avatar
  • 190
0 votes
1 answer
49 views

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 ...
user avatar
  • 101
0 votes
1 answer
446 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 ...
user avatar
  • 538
1 vote
1 answer
229 views

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 ...
user avatar
  • 538
0 votes
1 answer
127 views

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/...
user avatar
  • 538
0 votes
1 answer
151 views

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 ...
user avatar
2 votes
2 answers
241 views

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 ...
user avatar
  • 41
1 vote
1 answer
51 views

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 ...
user avatar
0 votes
0 answers
33 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 ...
user avatar
  • 485
1 vote
0 answers
144 views

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; ...
user avatar
  • 2,488
1 vote
1 answer
1k views

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 ...
user avatar
  • 192
1 vote
1 answer
114 views

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 ...
user avatar
0 votes
0 answers
80 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 ...
user avatar
  • 543
0 votes
2 answers
169 views

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.
user avatar
  • 2,623
0 votes
1 answer
174 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 ...
user avatar
1 vote
1 answer
1k 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. ...
user avatar
0 votes
1 answer
90 views

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 ...
user avatar
2 votes
0 answers
1k views

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 ...
user avatar
0 votes
0 answers
81 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. ...
user avatar
0 votes
1 answer
172 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 ...
user avatar
0 votes
0 answers
98 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 ...
user avatar
0 votes
1 answer
136 views

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 ...
user avatar
  • 135
2 votes
0 answers
104 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 ...
user avatar
  • 803
0 votes
1 answer
1k views

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 ...
user avatar
0 votes
1 answer
118 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 ...
user avatar
2 votes
2 answers
115 views

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 ...
user avatar
  • 21
1 vote
1 answer
122 views

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 ...
user avatar
-1 votes
1 answer
23 views

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 ...
user avatar
0 votes
1 answer
81 views

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 ...
user avatar
17 votes
3 answers
14k views

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 ...
user avatar
  • 1,215
0 votes
1 answer
118 views

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 ...
user avatar
1 vote
0 answers
52 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 ...
user avatar
  • 355
2 votes
4 answers
12k views

Why do servers have 2 PSU?

I have a Dell PowerEdge 2900 server and it has 2 PSUs, so: Can I run the server by having only one PSU plugged in? I am not going to have this server on all day and night. I'm just using it to learn ...
user avatar
  • 102
0 votes
0 answers
58 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 ...
user avatar
  • 135
-1 votes
2 answers
45 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 ...
user avatar
  • 101

1
2 3 4 5
9