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

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2answers
41 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, ...
8
votes
5answers
453 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 ...
0
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0answers
14 views

Real Machine randomly refuses to start [migrated]

Folks I`m completely clueless. I have a machine with the configurations above. By some strange reason at random times it refuses to boot, fans will spin but seems no power enough is generated to get ...
1
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1answer
46 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 ...
23
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3answers
2k 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
33 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
70 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
votes
1answer
203 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 ...
0
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0answers
26 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
62 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
vote
1answer
105 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
191 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
57 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
571 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
54 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
456 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
votes
2answers
61 views

my dell power edge 2900 power off after 1- 1.5 hours automatically

my dell power edge 2900 power off after 1- 1.5 hours automatically. the fault of fan speed on the front panel is viewed, but that should not stop the server. i swapped with redundant power supply ...
0
votes
0answers
32 views

Upgrading memory on an IBM Power 710 Express (8231-E1C)

I have problem with Power 710 Express server 8231-E1C. Server was loaded with 4x8GB (2xEM16) memory on a single riser card. I have replaced with 4x16GB (2xEM32). The firmware is AL740_126. At Hardware ...
-2
votes
2answers
158 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
votes
3answers
637 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 ...
12
votes
4answers
593 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 ...
0
votes
0answers
20 views

Why are wattage/amp numbers not fitting together?

I'm trying to figure out my backup power needs, and I'm having quite a difficult time with the numbers. Pretty much every piece of equipment seems to have wildly varying numbers that don't fit ...
4
votes
1answer
2k 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 ...
-3
votes
1answer
54 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 ...
2
votes
0answers
580 views

\FileSystem\srvnet preventing computer sleep

I have what appears to be a pretty common issue. Basically, most of the computers on my company network won't go to sleep. After a lot of testing (disabling shared services, multimedia stream, etc...) ...
3
votes
2answers
430 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 ...
43
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 ...
0
votes
0answers
29 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
votes
1answer
446 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
115 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. ...
1
vote
1answer
162 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 ...
3
votes
2answers
235 views

UPS unable to power the 1U server

1U rack server: http://ark.intel.com/products/67786/Intel-Server-System-R1304GL4DS9 Power backup: http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BR1000G-IN When I try ...
1
vote
1answer
544 views

iSCSI Datastores not found after Power Failure

I have an ESXi 5 host running 3 virtual servers. 1 of these servers uses a datastore via Software iSCSI on a separate piece of hardware. When the two hardware servers (storage and host) experience ...
5
votes
2answers
128 views

UPS for 30A service to server racks

Our server rack has two 208V 30A dedicated circuits running to it, each to a PDU mounted in the rack. Most of the equipment has redundant power supplies so one goes to each PDU. I'm not sure who had ...
0
votes
1answer
450 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
555 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
105 views

Two APC Symmetra LX 16kVA into one common output?

We have 2x APC symmetra LX 16kVA units running at the moment and have read (in Eaton's documentation) that their UPSs can have a common synchronised output (based on input phase or set phase with a ...
0
votes
1answer
325 views

PowerEdge 2850 RAID 0 Configuration - Drive not found

I have two 73GB 15,000RPM HDD in my PE2850 that I need to stripe as one logical drive so I can install MS SBS 2011 (which requires an 80GB volume minimum). I enabled RAID in the BIOS and paired the ...
1
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0answers
252 views

Error in AIX : 0516-040 : Unable to read the specified physical volume

Please provide me your valuable suggestions on the error beow in AIX. When I'm running the following command on the AIX server lsvg -l rootvg I'm getting this error: 0516-040 : Unable to read the ...
2
votes
3answers
115 views

How should mains power be conditioned for devices not protected by a UPS?

UPSes protect devices from more that just power outages. I've got a Schneider SURTA2200XL UPSes (manual here). It protects against all of the following: undervoltage (aka brownouts) overvoltage ...
5
votes
1answer
86 views

Power Control Compartment?

I recently purchased an IBM enclosed, rolling rack that had a 6 drive server, huge battery backup, and this strange item called a "Power Control Compartment" I cannot find any good documentation ...
0
votes
1answer
93 views

Can my cisco C220 run on 220v instead of 110v and if so, how do i change it?

We have both 220v and 110v power at our data center, but have more capacity left on the 220v circuit so i would like to put our new c220 server on it. What does it take to make this happen?
1
vote
1answer
94 views

power monitoring capabilities of ibm x3550 m4

I don't understand how monitoring of power consumption of x series servers is done with IBM AEM - I'm specifically interested in x3550 m4. The documentation on the servers does not really highlight ...
3
votes
2answers
112 views

Does the exact same load use the same amount of power on different processors?

Let's say that we have a set workload doing a set amount of work. If I have two identical servers, one equipped with a E5-2660 and one with a E5-2670 and otherwise identical hardware, will the total ...
1
vote
2answers
329 views

Server 2008 R2 - Allow UPS to wake computer?

I have a single Windows Server 2008 R2 box that's on a generic Geek Squad battery backup. (That purchase was not my choice.) It shuts down fine when the battery hits a critical level, but I can't seem ...
5
votes
2answers
70 views

What to look for when purchasing a power generator?

After an extended power failure that caused our UPS to run down and have issues coming back up once power was restored, I'm looking into getting a generator. What do I need to look at when specing a ...
0
votes
1answer
264 views

Does a Dell PowerEdge 1850 have a way to get Molex 4 pin power?

I have a PCI card that needs 4 pin power hooked up to it and wondering if there is a way to supply it inside this server.
1
vote
1answer
204 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 ...
4
votes
2answers
428 views

Understanding redundant power supplies

Im looking into the cost of putting a Cassandra cluster into a colo facility. Along these lines there would be 6-8 servers at the outset with expected growth over time. One option is just a series of ...
1
vote
1answer
576 views

Backup Power System for a Small Office: UPS, ATS, Generator etc

I'm trying to put together a backup power system for our office and I need some guidance. We frequently lose power for several hours at a time. I'm looking for a solution which would: Control ...