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-1
votes
0answers
3 views

Desktop PSU won't turn on after being turned off or unplugged, but flicking the PSU switch fixes it [migrated]

(apologies if the wrong board) I have a new desktop computer I built, with all new parts (except for the case). For some reason, if I unplug/replug it in, or turn the PSU switch off for more than ...
6
votes
2answers
261 views

Double UPS on high load during power down

To sketch the situation : a bunch of servers (~15 going from 4u to 1u, some redudant PSU some single) 2 UPS (1 APC I can read using apcupsd) 2 PDU So I came upon this situation, and I honestly ...
-7
votes
2answers
168 views

Server destroying and burning my Hard Drives [closed]

Before I start, let me inform you that I have been working as an IT Manager for large international companies for my whole life, and I have received masters degree from IT technology. I therefore ...
10
votes
5answers
697 views

How can I determine the power demand of an HP server's power supply under load?

I bought an HP DL360 G7 1 U rackmount server. I am looking to put it in a colocation facility. The issue is almost every facility I have seen either limits the amount of power I can access or charge ...
24
votes
3answers
3k views

How do servers with redundant power supplies balance consumption?

I have several servers from the HP DL360 line (generations 5-8). Each of these servers has two power supplies installed. The 2 power supplies in each server are fed from different circuits. My ...
1
vote
3answers
800 views

dell R710 / R620 power-supply broken after firmware update

We datet up the firmware on a dell R710 and some weeks later on a DELL R620. In both cases the firmware update on one of the two power supplies failed and it didn't work any more (amber flashing). ...
0
votes
5answers
490 views

FreeBSD determine if reboot was due to power loss

We are running FreeNAS (which is built on FreeBSD) to run our data storage systems. It is running on an APC Smart-UPS 750VA X. On a couple of occasions, I have been alerted to the fact that the ...
1
vote
1answer
116 views

5-pin 4-cable connector on SuperMicro server PSU?

I have a 4U SuperMicro SC847 Chassi that comes with redundant 1400W power supplies. All of the internal power cables (ATX, ATX12V, HDD and such) are connected to two circuitboards where the back of ...
8
votes
3answers
835 views

Power Cables Required to Switch from 120v to 240v for Dell Poweredge Servers

We have a cabinet of servers and other hardware (switches, firewalls, etc) that all are currently running on 120v. I've confirmed that the power supply for all of our devices support both 120v and ...
-1
votes
1answer
88 views

Does chassis mid-plane provide load balancing for power supply

I am new to blade chassis management, and i want to know what is the purpose of mid plane apart from connectivity. Does it provide load balancing among the power supplies. If so does that mean it ...
3
votes
3answers
879 views

How many power circuits do I have in a rack?

I'm planning to get some colocation space from someone in my area, and like most companies that offer colocation, ask about power supplies (of course) in the quote form. I'll need a power of 1000W ...
45
votes
7answers
7k views

Why do we still use power supplies on datacenter servers?

Computers mainly need three voltages to work : +12V, +5V and +3,3V, all of them are DC. Why can't we just have a few (for redundancy) big power supply providing these three voltages to the entire ...
-1
votes
1answer
542 views

hp proliant dl380 g5 won't power up [closed]

Sorry for a probably silly question. I just bought an used hp proliant dl380 g5. It is supposed to be in a ready to use state. The problem is that it does not power up. The power green lights at the ...
0
votes
1answer
1k views

Resert IBM system x3650 fault led

I got OVERSPEC, PS1 and PS2 fault led on my x3650. I tried to replace one PS but nothing changes. The power supplyp seems to work properly and it is very strange to broke both PS at the same time. I ...
0
votes
1answer
569 views

NVIDIA Tesla K20C in Dell PowerEdge R720xd — power cables

I am trying to put an NVIDIA Tesla K20C into a Dell PowerEdge R720xd. I'm having a bit of trouble understanding the power requirements of the card. First, here is a picture of two pages of the ...
9
votes
4answers
755 views

Maxing out both PDUs in a rack with redundant power

If I have a rack full of servers using redundant power supplies, and I'm keeping the amps at 80% (16A of 20A), isn't this still asking for trouble in the event of a power loss on one of the circuits? ...
2
votes
2answers
437 views

HP Proliant ML310 G4 power supply warning

One of the two power supplies in my HP Proliant ML310 G4 server has an amber/orange LED lit in one of the power supplies on the front panel. Also, the wave symbol is flashing in orange/amber. When ...
-2
votes
1answer
258 views

Difference between a power strip, a power distribution unit (PDU) and a remote power switch? [duplicate]

I would like to know what is the main differences between a power strip, a power distribution unit (PDU) and a remote power switch. Thank you.
5
votes
1answer
170 views

How to verify power provided to processors is clean

Once in a blue moon, I am seeing a blue screen of death on a shiny new Dell R7610 with a single 1100 Watt Dell-provided power supply on a beefy UPS. BCode is 101 (A clock interrupt was not ...
-3
votes
2answers
102 views

Windows 8 NTFS errors only when on adapter [closed]

We have a very strange error with a brand new ASUS Notebook S550CA, + Windows 8 64 bits Single language + 500 GB Hitach HDD (type: HTS545050A7E380). if the laptop is running on battery power, the ...
4
votes
2answers
995 views

DL385 G2 powering off after some time

I have one DL385 G2 server that since Thursday is not able to power on properly. I can't figure out what's the problem, since there is no indication neither in iLO 2 log, IML, nor any red/amber LED on ...
0
votes
2answers
675 views

Sun X4100 power supply failure LED on, but PSU working

I have a Sun X4100 with dual power supplies. The "rear PSU" LED comes on after the system is powered on and has gone through the self-test. Both power supplies are working just fine -- I can take out ...
1
vote
1answer
249 views

HP DL380G5 with APC SC1500 UPS — transfer time failure

I have 2 of these things: APC SmartUPS SC1500 (220v). My Proliant G5 DL380 PSUs seem to really hate them. This is what happens when UPS switches to battery (PSU2 is plugged into the SC1500): iLo IML ...
-2
votes
1answer
99 views

How to calculate total / max electricity consumpton for a server / or hardware equipment.?

Consider I have in the cisco 2911-sec/k9 data sheet following power values Maximum Power with AC Power Supply (Watts) 210 With this given value how can one calculate total electricity produced or ...
-1
votes
1answer
778 views

Could the Input/Output or some other difference between adapters/chargers cause this? [closed]

I have a laptop and my adapter/charger could not be used anymore as the cable was cut. So I bought a new adapter but it was slightly different than the original. My original had (Toshiba's original): ...
1
vote
2answers
107 views

Redundant Power System integration

We currently have a stack of catalyst 3750's at the core of our network. We just purchased two new 3750's to split off our VMs and SAN onto their own switches and away from the stack. These two new ...
4
votes
2answers
137 views

Does the additional load on UPS in case of grid failure amount to 100%?

The scenario is as follows: Servers are equipped with two PSU's each. One of these is connected to the UPS, the other one directly to the power grid (bypassing the UPS). I would assume that since the ...
7
votes
1answer
228 views

Is it safe to remove power from a linux computer in run level 0? [closed]

I am working on power supply to a Raspberry Pi where changing the state of one of the GPIO lines shuts off power immediately. Is it safe to do this in run level zero, or is there more shutting down to ...
1
vote
1answer
125 views

Is a 650W PSU enough for 4x 7k HDDs 2x CPUs and a monster AMD Radeon HD 5990 [closed]

I bought a supermicro chassis a few years ago with a 650W PSU for a personal lab I built. Everything has been just fine so far, but now that I'm looking into some GPU based work, I'm finding that I ...
0
votes
1answer
236 views

can power supply affect I/O [closed]

I have a dev server machine running Ubuntu 12.04. For a long while it's been throwing intermittent errors where it would suddenly tell me "File system is read only" or drop into a GRUB error console ...
1
vote
1answer
252 views

What is the % Energy Savings of a Dell energy efficient Power Supplies worth the extra cost? (I.e., what's the payback period)? [closed]

Dell offers an extra efficient power supply (PSU) with some products, such as their Optiplex 9010,which I'm considering buying. They say it's 90% efficient but don't explain exactly what that means ...
-3
votes
1answer
78 views

Power Supply And Power Cable at Equinix Palo Alto? [closed]

I will be doing a server installation at the Palo Alto Equinix Data Center soon and I'm coming in from overseas so I wondering if any of you can help me out regarding power supply can power cable ...
9
votes
2answers
4k views

How can I calculate if a UPS is sufficient for my requirements?

I am not that of an electricity knowledgable person, so I'll try to put as much info as possible. I have a Rack Mount UPS of 1800 Watts Model: PRP 3050 RM (in total I have 2 of these - talking about ...
2
votes
1answer
150 views

Two servers, two PSU's, Two UPS

I have two server, with redundant PSU's connected to two UPSs. The UPSs are APC Smart-UPS 1500VA and I want to shut down the servers when the power gets low. However, because I have a redundant PSU ...
0
votes
1answer
176 views

How much power supply do I need for my server, and could a shortage be causing my odd crashing?

I have 5 servers, all with similar hardware (i7, four 2tb 7200rpm drives, two 4tb 5400rpm drives, 430 watt power supply), and lately the machines have been freezing up. This has gotten worse in the ...
1
vote
2answers
108 views

What are the advantages of getting an expensive server? [closed]

Server CPUs cost multiple times more than Desktop CPUs; so do Motherboards and PSUs. What are the advantages of getting a server system rather than a desktop system? Stability can be one, but what ...
4
votes
3answers
10k views

HP Proliant DL380 G7 won't power on, UID light works, ethernet lights blinking, power button solid orange

Momentary press and long press of power button does nothing. Can get in through iLO but pressing the button there does nothing. This started after our block had a power failure but all our servers ...
0
votes
3answers
120 views

Router Power Supply [closed]

I have a wireless router that needs a 12VDC 1A power supply. I no longer have the power supply for it. Is there any harm in using a 12VDC 1.2A power supply instead?
-1
votes
1answer
50 views

PC Shutting Down Without Warning [closed]

I have a Windows 7 PC that is shutting down without warning, seemingly at random. Here are the symptoms and notes: PC seemingly turns off completely. After taking off the cover it turns out the ...
2
votes
2answers
92 views

What are the essential considerations for setting up systems in a location with unreliable power?

I deal with a lot of remote offices located in parts of the world where the local grid power supply is unreliable. Power can go off anytime with no warning, with outages ranging from minutes to days ...
1
vote
3answers
777 views

Why UPS operate deal with 110v/220v rather than integrate within PSU? [closed]

All the laptops I know about operate on ~19V, in consuming up to 150W. All the non-gaming desktops I know about take 110v/220v, convert into 12V & 5.5V, consuming up 400W. To provide desktops ...
3
votes
3answers
174 views

Chasis reset button vs remote power recycle

Ocassionally one of my remote windows servers locks up and must be restarted by pressing the restart button on the front of the case. Since I work remotely I call a coworker to press the button. I ...
0
votes
3answers
211 views

Powering an IBM x335

I've just purchased a second hand IBM X335 server in order to introduce myself to server hardware and management. Having never used such equipment before, I have much to learn, so please forgive me if ...
16
votes
3answers
4k views

How does a 3-Phase UPS distribute power?

We've got 2 UPSes in our server room. One's 3 phase, and has a 3phase supply, yet the APC network stats thing only says Incoming Voltage: 230.1 Volts The other is a single phase one with no ...
3
votes
3answers
3k views

How to measure server power consumption?

We have data center running more than 2000 servers. We are planning to shutdown the servers on a weekend for cost cutting purpose. How can we calculate which servers are consuming more power in the ...
3
votes
5answers
1k views

A plan to mitigate PDU failures?

A client just experienced a complete failure of an APC AP7911A switched/metered rack power distribution unit (PDU). This obviously took all of the connected equipment down with it. The equipment is ...
3
votes
2answers
445 views

How much power draws a redundant PSU?

One supermicro enclosure comes with "3 SP382-TS 380W Power Modules for a total of 760W". 2x380W = 760W, okay, but there are 3! So where is the missing third 380W equalling to 1140W?? Is it ...
1
vote
3answers
113 views

USB Legacy support burning PSU, is it possible? [closed]

So one day, the PSU in the machine I was working with decided to blow up. Yes, I heard a pop, and a strong burnt smell. So what happened? What caused it? How can I prevent it? The situation: The ...
0
votes
1answer
86 views

How does a server power supply withstand unto toggling the power?

My server will run only weekly for 2 hours for backup purposes. After I finished the backuping I pull out the power plug from the power outlet. How does a server power supply withstand unto toggling ...
1
vote
5answers
1k views

Server's power supply always on even if it is turned off

I just bought a used HP ProLiant ML350 G4p server and it's power supply gets working immediately after I plug it into power outlet. (the fan is spinning, and the unit consumes 20W of energy) The ...