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

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1answer
18 views

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

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 ...
0
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0answers
7 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 ...
0
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0answers
36 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 ...
0
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2answers
86 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, ...
2
votes
3answers
227 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 ...
1
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0answers
28 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
votes
1answer
53 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 ...
0
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2answers
113 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 ...
1
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0answers
56 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 ...
0
votes
3answers
108 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
174 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 ...
1
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1answer
61 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
votes
1answer
139 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 ...
1
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2answers
283 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
1k 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 ...
1
vote
1answer
78 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
votes
1answer
91 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 ...
25
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3answers
5k 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 ...
0
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1answer
103 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. ...
4
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1answer
111 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. ...
5
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1answer
294 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
votes
2answers
62 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
votes
1answer
57 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 ...
0
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0answers
29 views

Dell 2950 - extra AMP connector to power up HDDs

I am running 5 external HDDs in an enclosure that takes SATA cables + 2 AMP connectors. As I am not using any extra peripherals, I am sure that there is more than enough power in the 2950 to deliver ...
2
votes
3answers
68 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 ...
1
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1answer
248 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
970 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
98 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 ...
5
votes
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
146 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
856 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 ...
0
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2answers
178 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
273 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 ...
8
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3answers
997 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 ...
3
votes
2answers
2k 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
votes
4answers
896 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 ...
5
votes
1answer
5k views

Proliant DL380 G7 won't boot, solid amber power LED

I have a problem with an HP Proliant DL380 G7 that leaves me without much in the way of troubleshooting approaches. This server will not boot. It was stored in a datacenter, and I went to retrieve it ...
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votes
1answer
82 views

Commodity hardware related, i'm searching for a ILO, BMC, ALOM and in general IPMI alternate solution [closed]

I'm searching for a composite solution to have the same features of an IPMI controller on commodity hardware independently from arch/model and without excessive device dependencies. Essentially the ...
3
votes
3answers
1k 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 ...
13
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6answers
4k views

Can I plug a 15A UPS into a 30A receptacle?

I know that typically electronics draw only as much current as they need. Is this the case with UPSs? I have a 120 volt, 30 amp circuit, and am replacing the UPS plugged into that circuit with a lower ...
2
votes
0answers
111 views

NetApp filer uses more amps when one power supply is turned off

We have two old NetApp FAS3050 filers at our colo. We also have an upcoming maintenance window that will take our circuits offline for an extended period of time. Our circuits are pretty much maxed ...
3
votes
2answers
639 views

Best practice on Linux servers and CPU/power throttling?

I am running a couple of Debian 6 (2.6.32) and 7 (3.2) Linux servers and all of them have energy saving settings enabled in their BIOS. Furthermore Linux shows that the CPUs are throttled if the ...
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2answers
73 views

Is it safe to locate a UPS close to server

I have an Eaton 5S and a HP Microserver. I'm wondering if there's likely to be any problems stacking the former on of the latter (aside from stability). Do I need to be aware of any electrical ...
-1
votes
3answers
159 views

What will be the ill effects of turning off and on server daily

I have IBM server x 3850 M2 with remote system adapter. It has 128GB RAM and 4 SAS drives Its basically for my home labs , developmenet and testing I think that if i make it on 24 x 7 then i will ...
46
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 ...
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0answers
36 views

APC Power Controllers Inaccessible After Brief Power Loss

It seems like every time there is a brief power outage in our environment (1-2 second blip). There are generally a handful of APC power controllers that become inaccessible through network. The ...
11
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1answer
542 views

Daisy Chaining UPS Power Cable

I have a rackmount UPS. The UPS has a 6ft long 12AWG thick power cable that powers it from one of the server room's 20A wall plugs. The current orientation of the cabinets is not ideal. All but this ...
5
votes
1answer
130 views

Using more than 80% power on a circuit in a disaster scenario

We currently have two cabinets of equipment at our datacenter, and each cabinet is served by two 30A circuits. The facility is relatively new, and each circuit is (supposedly) redundant at the source. ...
0
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1answer
392 views

APC PowerChute management

I have 3 server with their Smart-UPS connected by USB cable. I downloaded PowerChute B.E. to manage ups. If I well understand PowerChute usage, I have to install an agent for each server and on unique ...
1
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1answer
381 views

desperately need 110v from a 208v pdu [closed]

I'm in a bit of a pickle... We're moving a client's infrastructure to a colocation facility. We have redundant 208v/30amp PDUs. While installing today, we realized that the client had a small ...