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Questions tagged [electrical-power]

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

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1answer
16 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 ...
2
votes
0answers
46 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 ...
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0answers
24 views

SuperMicro Server CPU Vcore, 1 VDIMM, VTT, 1.5V, 5V, 12V - low voltages but both PSU show as healthy

We have a SuperMicro Server here that I noticed has the information light a stable red. I log into IPMI and I see CPU1 vCore at 0.096 volts, the same for CPU2 and VDIMM AB. VIDM CD, EF, GH are at 1....
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1answer
78 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 ...
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votes
1answer
31 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 ...
2
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2answers
89 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 ...
1
vote
1answer
60 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 ...
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1answer
17 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 ...
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1answer
33 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 ...
13
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3answers
3k 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 ...
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1answer
52 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 ...
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0answers
42 views

HP ProLiant DL380 G6 with 2 x Intel x5650 CPUs apc back ups pro 1500

Hi if got a apc back ups pro 1500 and installed it with APCUPSD when the Battery level is low (5min left) the server is shutting down fine. once the system is off a view sec later the server wennt on ...
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0answers
40 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 ...
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0answers
42 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 ...
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2answers
36 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 ...
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2answers
152 views

Additional SATA power on PowerEdge T130?

I have a new PowerEdge T130 that came with two SATA drives in RAID 1 setup on a PERC ctrl. I want to add another SATA drive not connected to the PERC controller. I opened the case up and see there's ...
3
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2answers
947 views

HPE DL560 Gen8 Power fault detected. What does that mean?

my DL560 Gwen 8 generated this problem. System Power Fault Detected (XR: 14 00 MID: FF 0D F0 0C C0 FF FF 0A 0A 0C 0C 00 9C 40 00 01 03 47 00 00 00 00 00 00 00 00 00 00 00 00 00 00) and powerd off ...
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1answer
134 views

Should you occasionally discharge UPS to higher degree?

We're occasionally experiencing some short outages (few minutes at most or even seconds) so batteries in UPS almost never get below 90-80%. Is it advised to sometimes (eg. once half a year) perform ...
3
votes
1answer
71 views

Mixing mdadm RAID with partially power loss protected SSDs

I have created a mdadm RAID 10 with 4 SSDs. 2 of those SSDs are consumer models and does not have the power loss data protection feature. At the RAID creation i have put 1 SSD with power protection ...
3
votes
2answers
127 views

What scale of data loss or corruption do I risk if I enable the write buffer on a file server?

I have found plenty of articles online warning of risk of data loss or corruption for drives with write-buffer enabled in the event of power loss. However, I haven't found any that actually refer to ...
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3answers
120 views

Electricity outage killed 4 out of 6 UPS

We recently had an electricity outage of 1-2 seconds at one of our buildings. In this building we have 6 UPS and 4 of them died while/after the electricity outage and all the servers were powered off. ...
3
votes
1answer
290 views

UPS inside server room?

In my company we are considering to move our servers (some are mounted on 25U rack and some are tower servers) to a newly created room (underground, no windows) that contains 40 KVa UPS and redundant ...
0
votes
1answer
130 views

Cisco Catalyst 2960-48TT Switch Power Supply

What exactly is the power supply for the Cisco Catalyst 2960 Switch? This is probably a very dumb question. I bought one and while it had 2 terminals for power adapters it had no power cords packaged ...
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1answer
36 views

Loud Pop from DL380G5--then neither PSU lights up when plugged in

I wanted to fire up my old DL380 G5 server recently, and maybe one second after I hit the power button and the fans started to rev up, I heard a loud pop and suddenly it shut down. Now neither PSU ...
3
votes
2answers
172 views

Redundant UPS with 2 power sources

I've 2 power sources in my house: One from the national power grid and another from an internal power source. I've several power sockets in my server room from these 2 sources. Did some research and ...
5
votes
1answer
979 views

Is it possible to convert 4-pin floppy to SATA power?

I just bought a server and realized that it had power for all my drive bays, but not for the internal SSD I bought for it. It does, however, have 2 free 4-pin floppy power connectors: Is it possible ...
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votes
1answer
91 views

600W PSU max Watt load [closed]

I have purchased an EVGA 600W Silver PSU. It is connected to the following: Motherboard + CPU + SSD + 3 x Video Card (RX 470 with riser cables). I have a watt meter which I have connected to the PSU ...
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votes
2answers
2k views

HP ProLiant ML370 G6 shows no sign of life after RAM upgrade [closed]

I have power issues with my HP ProLiant ML370 G6 server after Ram upgrade. This server has been running without interruption for a very long time and when we decided to power it off to upgrade RAM we ...
2
votes
1answer
38 views

Rack Power Draw Reliability

I am responsible for several racks worth of gear, and as part of a datacenter efficiency project, I need to move some gear around. One constraint I'm running into juggling these servers around is ...
0
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1answer
389 views

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 ...
17
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6answers
4k views

Is it safe to use a UPS designed for desktop PCs to power a server?

I am working on a server within my office. The server will eventually be relocated to a data center. I would like to be able to leave the server switched on in my office, which means I would like to ...
1
vote
1answer
322 views

Disable CPU sockets dynamically in Linux to save energy?

I have a 4X Xeon X7560 Dell r810 server that uses a lot of energy, even while idle (400 watts). I don't need all 4 CPUs active when the server is idle or under light load, so I wonder if I can save ...
1
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0answers
40 views

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 ...
1
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3answers
353 views

Reduce the risk of data corruption due to power loss

We currently have a number of servers in places where the power often drops out for various reasons. The servers all run ESX with a couple of linux guests. Putting in UPS's here isn't practical just ...
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votes
1answer
175 views

Booting Dell PowerEdge T300 without front panel

There is a front control panel on the board with a header. I do not have this and I want to boot up the server. I need to know where the power switch pins are so I can switch it on.
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votes
1answer
34 views

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 ...
1
vote
1answer
475 views

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 ...
2
votes
2answers
220 views

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 ...
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votes
1answer
166 views

How do I move a server to a new power source without powering it off?

I have a server that has a single power supply that it is plugged into the wall. I want to transfer the server over to a UPS power supply for redundancy but do now want to power off the server for ...
0
votes
1answer
85 views

Can you exceed power rating on a UPS with additional battery packs

After reporting the wattage of a remote site that doesn't have a UPS to my boss he cc'd me on the quote for what he was going to order. The site's networking and server equipment are using over 2,000 ...
6
votes
3answers
2k views

Dual power supplies on the same circuit

As the title says, I have two power supplies in a server on the same circuit. The circuit is connected to surge protection, power filtering, and UPS. The only reason I use both power supplies is ...
1
vote
0answers
702 views

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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votes
0answers
102 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 ...
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votes
1answer
23 views

Power consumption idle vs. maxing out every core

Are there any rules of thumb to describe about how much more energy a server will use when its cores are completely occupied, as opposed to being idle?
2
votes
1answer
80 views

Dell Poweredge 6850 fans but no power

I know the 6850 is a very old model, but here goes. I have a poweredge 6850 that a friend of mine has had for quite a while, but hasn't used for about 9 months. He's recently made more space in his ...
1
vote
1answer
297 views

Need circuit diagram for hp-r650ff3 power supply [closed]

Can somebody please provide a circuit diagram for a HIPRO HP-R650FF3 swappable power supply unit? One of those which is built in one of our main servers went down after a company wide power failure ...
0
votes
1answer
473 views

Cannot boot server after power failure

After a power failure, my server cant boot anymore. Switching power on do nothing. No fans, no boot, no sound. Nothing. Shorting the power switch on the motherboard also do nothing. My motherboard ...
0
votes
1answer
68 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 ...
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votes
1answer
144 views

Power consumption PDU

As you can see in the image below, I can't get the consumption. Even if I send the log via FTP there's no info about the consumption. I already checked on APC PDU website and co and i didn't found ...
0
votes
0answers
185 views

Power generator monitoring using snmp

I have power generator connected to the network via Nport serial device server (working in real COM mode) since it doesn't offer standard ethernet connection. I'm able to get to generator parameters ...