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

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How do I power this SAN safely and with redundancy on the power circuits?

Location: USA We are looking at powering a new Storage Area Network (VNXe3200). There are 10 units in total, each with two power supplies for redundancy. Assuming we can do either single-phase 120V ...
2
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2answers
40 views

Supermicro X8DAH+-F will not power on

I have a Supermicro X8DAH+-F Rev 2.01 motherboard that will not power on. I have two Xeon E5645 installed and 6x 8GB 2Rx4 PC3-10600R DIMMs installed in the A and B slots for each channel of each CPU ...
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4answers
1k views

Can Running a Server's Redundant PSU on Different Circuits Damage It?

So I've been tasked to document and review the status of the UPSes for my current employer and identify any changes that need to be made. Generally easy stuff, however I came across a few units that ...
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0answers
8 views

Limiting server power current usage (amps) possibly by UPS

I have a current limit of 1A, which one server idles far below (around 750 mA). But when the server reaches full load, meaning both CPU and RAM are at about 90% or more, the server sometimes peaks ...
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0answers
9 views

PSU voltage sag tolerance

I am interested in learning how tolerable my hardware to power loss due to switching between circuits (via transfer switch) or due to lag when line-interactive UPS kicks in. I have several servers ...
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4answers
153 views

UPS Requirements - Max load or actual load?

One of our UPS units failed this weekend (Happy new year!), and so I'm on the look out to replace it. I've done the calculations for our power requirements, and it comes out just under 8000W. This is ...
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3answers
184 views

New UPS Batteries Dying in Months

This is something that has had me stumped for over a year. I have 3 APC SmartUPS 3000's and a few non APC units in my server room. Each unit has it's own dedicated connection to the breaker panel. ...
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1answer
65 views

HP ML10v2 - Power Failure - Critical Temperature

I received an ML10v2 today. I haven't installed any HDDs yet but have installed a SATA optical drive which is connected directly to the m-board. The server doesn't boot and doesn't produce a video ...
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1answer
67 views

How do I get the power consumption of a Dell PowerVault on the CLI?

How do I measure the power usage of a Dell PowerVault storage device from the command line of the attached server?
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1answer
62 views

How do I get the power consumption of a Dell Poweredge server on the CLI?

How can I measure the power usage of a Dell Poweredge server from the command line interface?
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1answer
106 views

How do I get the power consumption of a Supermicro server on the CLI?

How do I get the power usage of a Supermicro server from the command line?
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3answers
52 views

Are there any radio activity problems i may face from working in the server room?

I work an 8am-5pm job in a server room partition, separated by closed glass from the actual room where the server racks are mounted, from where the continual buzz sound of running servers, ...
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1answer
11 views

HP Proliant server ML310eGen8v2 not powering on

HP Proliant server ML310eGen8v2 power on/standby button is blinking green for long time and when it powers itself on it doesnt post. No VGA output just noise. I have tested it with hundred of UPS ...
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0answers
12 views

SLURM power saving features

For those who have used SLURM resource manager, have you used the power saving features to lower your cluster's energy usage? Has anyone found that power saving lowered their electricity bills? Did ...
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0answers
22 views

+12v lower critical threshold asserted on Intel Blade Server

We have an Intel blade server that has 4 active blades. One of the blades completely turned off last week. Yesterday, the blade restarted itself.... Looking deeper into it, we are seeing an error, ...
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1answer
47 views

Handling the potential risk of writing random bits to storage during power loss with RAID [closed]

Is it possible for a power failure to cause some part of a machine to write one or more random bits to a storage device? Someone proposed the following idea to address such a risk: create multiple ...
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0answers
15 views

Xenserver 6.5 Remote Power On Hangs

After installing OMSA on both of my PowerEdge M620 blades running xenserver 6.5 I tried using the 'Power On' feature. In xencenter its showing that its trying to power on the server but no progress ...
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0answers
67 views

system randomly powers off

I've got an HP MicroServer N54L running Linux Mint 17.2 (fresh install). Every few days, I find the machine in a powered-off state (standby, actually - not in the sense that it went to sleep, but in ...
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2answers
240 views

UPS systems in parallel for redundancy and/or capacity, generator as backup, ATS,

I am about to upgrade our server room's power plan and would kindly ask you for your help with a proper, optimal design / advice on "good practice" approach. Please note that our business is small, ...
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3answers
282 views

Cost of running a specific server based on consumption

I have ventured across many sites in the last 3 days with no real definitive answers. Attempting to price a near to true value of the running cost of a specific server based on consumption and not ...
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0answers
30 views

How to ground a server rack on 3rd floor office [duplicate]

I am in the process of building out a server rack in an office on the 3rd floor. Does anybody know of any good options out there that can help me out? Wall outlets have 3-prong connectors with working ...
0
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1answer
70 views

Where to buy a 48VDC power supply for a server? [closed]

Where can one buy a power supply for a server that has -48VDC power input (like this one, for example)? Which power supplies would you recommend? EDIT: I am looking into integrating a server like the ...
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2answers
165 views

Maximum power allowance for server rack

I have a server rack which consists of the following items 1) 1 x Cisco 3750V2 Layer 3 switch (24 ports) 2) 3 x Dell Power Edge R720 I am not sure which criteria I should be looking for to ...
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0answers
66 views

PowerChute with ESX - how to start the VMs

I have a setup with a couple of ESX servers and two APC UPS. The ESX servers are govern by vCenter and I've deployed vMA (provided by VMWare VM) on one of the ESX hosts and configure it to target both ...
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3answers
164 views

Amount of current (amperes) from a power outlet

I am looking after a few servers -- a small number and not worth calling a "data center". As the servers aren't located in a "proper" computer room, I am wondering whether or not the power outlets ...
2
votes
1answer
451 views

Is there any reason to keep the power option on default “Balanced” instead of “high performance”?

We rent our servers at a local hosting partner, they manage the setup and settings and we just use them. But we have as well admin rights, but the management is at their side. So if I switch importend ...
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1answer
77 views

Surge Protector for PDU and Servers

I am going to be attaching my gear in this order: 20 amp outlet => Surge Protector => PDU => servers. My current PDU says in the manual "does not provide surge or line noise protection". I have been ...
2
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1answer
260 views

APC Switched PDU: group outlets on different PDU's

We have newer gen 2 switched PDU's and I noticed that they have an ability to daisy chain the PDU's. I can see that dasily chaning allows us to have a central access point for the PDU's which is ...
2
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2answers
584 views

How do I condition power between a generator and a UPS?

How do I condition power between a generator that does not produce a clean sine wave and a UPS to such a standard that the UPS will accept the power? I have tried running through a power conditioner, ...
10
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5answers
3k 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 ...
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1answer
93 views

High peak power demands in datacenter; lower costs? [closed]

Short version A UPS seems to have only two modes: Supply all power from the input feed Supply all power from the internal batteries (when the input feed is gone) Can a UPS also be used to balance ...
2
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1answer
170 views

Zero-U PDU preferred mount location

Looking for some experience from the field - The rack I manage has two zero-U vertical PDU's supplied by the datacenter. They have fitted one on each side (one on the left, one on the right). The ...
28
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3answers
8k 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 ...
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1answer
138 views

iDRAC 6 Power Monitoring Not displaying

I recently bought a Dell R210ii with a iDRAC6 Enterprise card installed. Everything seems to be fine except there is no mention of power monitoring on the iDRAC website, only voltage status. ...
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1answer
162 views

Monitoring Datacenter Voltage Spikes

We have reason to believe that were getting voltage spikes in our infrastructure. Demonstrated by our remote power controllers receiving over voltages on their regulator pins causing them to fail. ...
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1answer
330 views

Troubleshooting unusual server room power issue. (Suspected power surges or spikes) [closed]

We have been experiencing a very strange problem in our new office's server room across all the power outlets. Specifically, when all the equipment is up and running (i.e. the air conditioning ...
2
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2answers
64 views

How to estimate potential power savings

If I have some servers set to static high performance mode, is there a way to generate a report on what power savings mode would have done, if it were enabled? I am looking to generate reports of the ...
0
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1answer
84 views

Supermicro X7DBU, how to put it to sleep

I am very new to server administration and just learning the stuff. I have just inherited a Supermicro 1U Server X7DBU running openSuse 12.3. Is it possible to configure it to go to sleep or low power ...
2
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3answers
74 views

What functionality does smartd lose when disabling state saving or attribute logging?

I'm trying to let my backup server have its disks in standby as often as possible. Outside of smartd or actual backup usage, the disks currently spin up once per day (various cron tasks). smartd, by ...
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1answer
376 views

configure power restore policy HP ProLiant BL2x220c G6 [closed]

After each reboot my server automatically powers on: Power Overload : false Power Interlock : inactive Main Power Fault : false Power Control Fault : false **Power Restore Policy : ...
4
votes
1answer
2k views

Heat generated by a HP ProLiant DL380p Gen8 entry EU servers

I have to buy a stand alone server rack to be placed in a machine room. The temperature can reach 30°C in the room (I have no choice with regards to the location). In order to correct for this I will ...
0
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1answer
121 views

Guest VMs Unknown after power outage on HP VSA

A remote office had a power outage tonight. When the power came up, both the Physical DC and the Physical ESXi Server came up. Connecting to vSphere, I can see the HP-VSA has started, but the other ...
6
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3answers
1k views

Floppy power to PCI-E card in DL380 G5

I have an HP DL380 G5 server and a PCI-E card that I need to use in the server. The problem: the PCI-E card requires additional power from a 4-pin floppy connector, and the HP DL380 G5's PSU has no ...
2
votes
1answer
249 views

After UPS battery replacement (HP R/T 3000)

has any one had experience with this UPS? i have replaced the batteries but have't ran self test yet, if i run self test is there a risk of powering down the machines the UPS powers? just wondering ...
5
votes
2answers
1k views

Which STONITH hardware for power fencing?

I'd like to setup a two node high availability cluster using corosync/pacemaker/drbd. For that, of course, I need fencing. As far as I understand, all IPMI/iLO/... solutions do the job, but only as ...
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2answers
248 views

HP Proliant Standby

I'm working on coordinating a rack with 1 HP Proliant DL580 G5 and 2 Proliant DL380 G4's. Is it possible to induce either of these units into something like a standby mode? I've perused the manuals ...
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2answers
370 views

LogMeIn mess my wake-on-link?

I have windows 8.1 64 bit with an on-board network card (LAN: Intel® Gigabit Ethernet Controller driver for Windows 8.1*) Now - please notice : I have created an Acronis IMG right after installing ...
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3answers
1k 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 ...
4
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2answers
4k views

Automatic power on after graceful shutdown on UPS

This is my basic setup: I run a server (DL380 G7; linux 3.13 kernel) that is host to ~10 virtual machines It is set for automatic power on I use NUT for UPS management Graceful shutdown duration of ...
12
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5answers
1k views

Is there any value in protecting both rack power feeds with their own UPS?

I've done some looking and have not found a satisfactory answer to this question. When is it necessary or suggested to use an independent UPS (on it's own mains branch circuit) for each power feed to ...