Questions tagged [power-supply-unit]

Questions related to power supply units, aka PSUs

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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 ...
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2 votes
0 answers
39 views

Preserving a mothballed system: soft shutdown, PSU off or unplugged entirely?

I've got a system that looks like it's going to be kept around "just in case" (virtualization has already been explored). Long ago I had another such system but when when it needed to be ...
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35 views

Redundant Power supplies do not show up in ipmitool

I work with a server with redundant power supplies, which work as intended. When I try to retrieve information about, which power supply currently has power using the following command I found: ...
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  • 101
-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 ...
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1 answer
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Trying to convert a Dell T420 Single Drive to Redundant. Looking for validating my steps

I have a Dell T420 and read different ways to upgrade it to redundant PSU's. Details I saw on Dell's website a thread where a user asked how to upgrade to a redundant PSU versus the single 550psu. ...
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104 views

Intel Server starts intermittently, giving 1-5-4-2 and 1-5-4-4 beep fault

I have an Intel SC5520HC based server that runs as a computational machine for students at the university lab i work at that won't currently power up or powers up intermittently. We've had x2 power ...
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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,...
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37 views

Getting Redundancy Lost and Fully Redundant in ipmi system event log

I have HP ProLiant DL180 G6 server. I am getting such events in ipmitool sel elist: 18 | 08/12/2021 | 15:46:21 | Power Unit PSRed Status | Redundancy Lost | Asserted 30 | 08/12/2021 | 15:46:22 | ...
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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 ...
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  • 379
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1 answer
179 views

Required PSU Power for 12 HDD SATA 7200RPM (i have 20 A on my PSU peripheral channel)

I have a Tower server with today many hard drives and i would like to add hard drives for securing a raid group and also to extend storage capacity. Hardware spec before adding everything else : PSU :...
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1 answer
110 views

HP PROLIANT 1300w hstns-pa01 PSU orange/amber light

I bought an HP Server PSU (For mining) - HP PROLIANT 1300w (hstns-pa01) - I plugged it in and it was working perfectly for 12h and 20min, then the rig shut down ( because no power) but PSU fan was ...
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1 vote
1 answer
235 views

Grounding of a server rack on wheels

I have a 42HE 19” server rack which houses a bunch of equipment (UPS, PDU, server, network, ...). It has wheels so it’s easy to move and it stands on a concrete floor. The rack is out of metal and ...
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  • 538
1 vote
2 answers
190 views

How to power-up PSU from Proliant DL185 without mobo?

I have an old Proliant DL185 G5 server with a 447325-001 Power supply backplane. Two connectors seem to be interesting, one is what looks like an ATX-power connector and connecting green to GND spins ...
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  • 81
0 votes
1 answer
116 views

Dell T420: can I replace the original non-redundant power supply with two redundant ones?

A Dell T420 bought in 2015 was originally configured with the single 550W non-redundant power supply. Replacement parts are cheap these days, and I'd like to replace the single P/S with dual ...
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  • 669
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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 ...
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-2 votes
1 answer
689 views

how to turn on Server power supply Lite-ON model PS-2122-8L1 without server chassis [closed]

I wanted build 48v DC power from 4 12v power supply units. Eventually i got my hands on Lite-On PS-2122-8L1 server psu. But after getting it, i am still unable power it on with out chassis. i mean i ...
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1 answer
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HP DL380 G7 Power Calculation

My current Config HP DL380 G7 2x E5620 CPU (80 W each) 8x 16 GB 1000 MHZ DDR3 Ram 4x Sata SSD Dual 460 W Power supply. Can I replace cpu's with Dual X5675 (95 W each) ? HP ...
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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 ...
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0 votes
1 answer
218 views

Server suddenly very sensitive to minor brown-outs

We have a number of SuperMicro RAID 10 boxes with redundant PSU, the same model and spec and use the same rackmount APC UPS. One has suddenly taken to rebooting if there is a minor brown-out. ...
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0 answers
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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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  • 543
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1 answer
3k views

What does orange light on power supply mean?

I have an Intel® Server System P4000CP Family. Today I've discovered that one of power supply has green light, second power supply has orange light. What does it mean?
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  • 129
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1 answer
195 views

Rel-time monitoring on Redundant PSU's

we're using 3 HP DL380 Servers with redundant power supplies and vmware esxi hypervisor is installed. is there a way to determine the actual status of the power supplies in real-time? current voltage ...
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  • 21
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1 answer
339 views

Zippy/EMACS G1W2-5760V3V Power supply manual or pinout information

I now have two different sizes of emac's power supplies and both have 2 extra pairs of wires, Red and black as well as yellow and black. On the model above they both have 2pin push connectors with ...
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  • 283
1 vote
1 answer
50 views

Using one power supply for my SunFire x4100

Is there a risk on using just one power supply on this server?, I just found out that you can POST and run stuff with only one power supply (even tho I still get the LED errors) , I read the manual ...
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6 votes
2 answers
586 views

At my wits end. What could cause my server to randomly hard reset? (Seems to be related to ZFS)

I have a server that I built years ago that has worked like a champ. But within the past few months it has started to become seriously unstable with no discernible pattern. I have been debugging it ...
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  • 339
-1 votes
1 answer
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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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0 votes
0 answers
1k views

What PSU form-factor do I need?

So I finally got my Fantec SRC-2080x07 2U server chassis replacement. Only to find out that the Be Quiet TFX Power 2 300W Gold PSU that I ordered, is too small to fit. Here's a picture of the PSU ...
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0 votes
1 answer
117 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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0 votes
2 answers
2k views

Power Supply Information

Is it possible to view power supply information of a remote Windows (2008) server? It's a Dell Poweredge R720 The physical server is in a remote location and I only have RDP access. I can't see ...
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-1 votes
2 answers
81 views

Random shutdown, then doesn't power-on until power-plug is pulled out from wall and plugged back in [closed]

We have a workstation machine which, for the past three days, shuts down (apparently) randomly. After it shuts down, if you press the power button, the machine won't start. However, if you pull out ...
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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 ...
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  • 102
-1 votes
1 answer
260 views

HP DL360 G5. Doesn't start if power cable plugged in PSU1

I bought an used server. When I plugged in a first PSU (the one near sidewall) a power cable, some fans turned on, a led on the front panel light orange, on mobo green leds works. When I press a power ...
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-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 ...
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  • 101
2 votes
3 answers
466 views

Safely conduct tests that require unplugging server

So, basically I am testing and diagnosing my UPS's as well as the power sources (PSU) of my server. For that purpose I am powering down the server "the hard way", by unplugging it from the wall as to ...
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1 vote
1 answer
417 views

HP DL180g6 requires operator intervention to boot on one power supply

Summary: Used DL180g6, with redundant power supplies, that just came in will not boot unless either both supplies are powered or the operator presses F1 on the keyboard. If 2nd supply comes up after ...
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4 votes
1 answer
5k views

HP Proliant DL380 G7 power calculation

HP Proliant DL380 G7 in year of production has alternative PSU: 750W in "performance" configurations with 2 CPU 460W in "base" and "entry" with 1 CPU "Power advisor" calculator is not accesible in ...
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  • 141
1 vote
1 answer
260 views

Sun Fire v440 does not power on

I have an old Sun Fire v440 server which was in working condition before a shutdown a few months ago. Today I tried to power it on but nothing happens when I press the power button. On both PSUs ...
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-3 votes
1 answer
42 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 ...
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3 votes
2 answers
510 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 ...
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  • 91
5 votes
1 answer
4k 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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  • 1,078
-1 votes
1 answer
246 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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  • 111
5 votes
1 answer
3k views

spontaneous reboot, machine check events, AMD ryzen [closed]

I've been running a brand new system on arch linux for about 3 weeks, and last night it spontaneously rebooted. There's no shutdown/halt in journalctl at the time of the reboot, so I'm pretty sure ...
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0 votes
1 answer
750 views

Power Led Error in IBM/Lenovo M5 X3100 Server

I have a x3100 M5 Lenovo/IBM machine that is being used as file server. As of yesterday it had two 2.5" Samsung SSD's plugged in. Today I tried plugging in 2 x 3.5in 4TB hard drives, and when I tried ...
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  • 5
1 vote
2 answers
277 views

HP Proliant DL160 No Power Meters detected?

I've recently installed the hpasmcli on my ProLiant DL160 G6 and wanted to see what kind of power draw it was having. However, when I try to use the show powermeter command, I get a "no power meters ...
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  • 479
-1 votes
1 answer
74 views

Halt, not power down, a windows server

A client recently changed their UPS and now claims that their server is not coming back up after am extended power outage. They have tested their system and it will keep the last state, so if the ...
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  • 109
3 votes
2 answers
3k views

HP ProLiant server - PSU error despite replacing PSUs

We have a HP ProLiant ML350 G6 server causing us a few problems. The main symptom was that every so often we would find the server simply powered off. We turned the machine back on and investigated ...
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9 votes
4 answers
428 views

Redundant Power Supply Sloshing (If sloshing is the right word)

I have a Supermicro Redundant Power Supply with two units in it. I also have two UPS units, one for each of the Power Supplys. I was watching the LCD on the UPSs for the watt usage. The total watts ...
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  • 91
-1 votes
2 answers
1k views

Power requirements for SAS enclosures

I have a Supermicro 4u enclosure with dual 1400 watt power supply running on 220v. There are 24 drive bays. The power supply is rated at 4amps for the 5v output. If I have 24 drives that requires ....
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0 votes
0 answers
227 views

Raid drives continue to fail perc 6

SERVER: Dell T410 Raid Controller: Perc 6/i What is the best way to diagnose root cause of failed drives? Back story: So I had a 4-drive Raid 10 + 1 hot spare setup. This setup worked for years, ...
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  • 123
0 votes
1 answer
1k views

IPMI data for power supply missing

I have 3 Supermicro AS-1042G-TF servers and on one there is no data shown for power supply, JAVA application for MAC shows an empty window as do IPMIView apps for iOS and Android, on Android there is ...
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