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

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APC Smart-UPS Amps - How many amps does it use all by itself?

APC Smart-UPS XL 3000 http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=su3000rmxl3u&tab=models I have two of these APC units. They use NEMA L5-30P electrical plugs. I'm ...
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3answers
1k views

Is it possible to use mixed 110V / 208V power on a single server with dual power supplies?

Is it possible to run a dual power supply server with one PS plugged into 110V, and the other power supply plugged into 208V? We've asked the vendors and they say they've never tested it or some other ...
-1
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7answers
357 views

How can I power down my server when the mains power plug is pulled out?

I have a server (Dell R310) running which has a main power cable (long) connected to power(in the wall). Anyone who is bored will pull out that cable (Train station/Airport/ Public zone) and server ...
0
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1answer
608 views

Running IBM servers at both 110v and 220v at the same time for a few seconds for power migration?

In our data center we are going to be moving all of our dual power supplied IBM servers (auto sensing 110/220) from an outdated 110 system of dumb power strips to an updated in rack 0u 220 monitored ...
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3answers
6k views

Powertop reports “Bad” “Runtime PM for PCI Device”

I've noticed that powertop utility reports "Bad" "Runtime PM for PCI Device" for several devices. Seems that powertop can fix the issue but it won't tell what exactly it does to fix it. What should I ...
28
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5answers
1k views

How to build and run a machine room?

The last guy quit (I think a lot of adventures begin this way?) and I've been given the job to build a new machine room. I am coordinating with 2 engineers, campus ITS, campus Facilities Management, ...
10
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4answers
1k views

Proper Sizing for PDU's/Power in Rack

I've struggled with sizing my power sources and associated PDU's in my server racks. Somehow I feel like I'm way oversizing things based on nameplate requirements on power supplies. My simplistic ...
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6answers
5k views

Best practices for power cabling racks in DC

With network cables it is easy. I use velcro-ties, coloured cables, 0U vertical cable organizers from APC on side of the rack -- easy and neat. However with power cables it was always giving me ...
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3answers
74 views

ups and an unconfigured server

Say I have got a big room loaded with servers and a big cupboard size battery as a ups. Now the electricity fails. Is there some way for the servers to know that they should shutdown? Does the ups ...
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0answers
857 views

EventID 4098 : Group Policy Power Options gets Access Denied when applying a power scheme

I created a Group Policy Preference on my Server 2008 R2 DC to Update the Always On power scheme and make that the Active Scheme. I see the GPO apply in GPResult but the power settings do not ...
2
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1answer
446 views

Uninterruptible Power Supplies: Line-interactive vs Double-conversion / online

We recently got an inline generator installed at our facility that backs up our IT room. It detects the outage and kicks on within about 20 seconds of an outage. For those 20 seconds between the ...
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2answers
271 views

Is this an NEMA L6-30R Plug?

My employer just bought a building with a decent server room. Before I go out and spend some money on a UPS, I want to confirm that this is actually an NEMA L6-30R (sorry for the poor image). I've ...
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5answers
1k views

Which is better for heat: 120v or 220v?

I've got the following gear in a small 120sqft room. While AC is supplied it's a home/office and in the summer both the central air at full go and a standup indoor portable AC on full barely keep it ...
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1answer
587 views

IBM xSeries 335 General Questions (power usage and installation)

I just received a 2nd hand IBM xSeries 335 1U rack mountable server, and I have a few questions about it: How do I install it? Is there an Installation Utility disk like for the HP Proliant servers ...
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3answers
154 views

Surge Protection for Servers not Connected to UPS

For servers or network switches not protected by UPS, is there any product to guard against power surges / spikes? Power conditioners available seem to be for home /audio video usage. Was looking at ...
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2answers
226 views

Placing UPS in front of STS; Connecting Dual PSU to same PDU

The site has 2 x 16A @ 230V, each server/SAN has dual PSU set up. Options: 1) [2 x 16A] ---> [1 x STS or ATS]----> [1 xUPS]---->[2 x PDU]----->[DUAL PSU] As can be seen the server is actually ...
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2answers
1k views

What's the maximum number of computers I can safely power on a 13-amp supply?

Due to a lack of power in a new office building, I am having to daisy chain strip plugs off a single socket. Roughly speaking, how many amps does a desktop computer with screen consume? How many ...
0
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1answer
280 views

Looking for a basic auto-ping power watchdog for my flaky server

My home Mac Mini server keeps locking up, and I was looking into a switch to automatically cycle the power when it stops responding to pings. Is there a simpler/cheaper alternative that devices like ...
1
vote
2answers
537 views

What UPS would you use for remote network switches?

I came into work this morning to find out that one of our CISCO 2960s had died during the night, I haven't had a chance to figure out why, but I'm guessing a power spike killed it, and the surge ...
2
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1answer
39 views

Application Power

I need to run an application that would consume a lot of power on a laptop. Basically the app must be very power hungry. I know that running a real time games with heavy graphics would consume lot of ...
183
votes
14answers
7k views

What is this very short power cable called?

I have a couple of networking components in my rack that take giant AC adapters ("power bricks") that don't fit neatly into my rackmount PDU. I have one "thingy" that is shown below, and I need to ...
3
votes
3answers
191 views

Can USB powered device affect longevity of the port?

Looking to purchase a new DVD Writer for the first time, I notice there are USB powered devices available which do not require an external adapter/power-supply. This may be sufficient for stuff that ...
0
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3answers
3k views

Switching from 120v to 208v power

We are going to switch from 20 amp 120 volt to 20 amp 208 volt circuits in our colocation facility. I am new to dealing with anything other than standard 120v power, so I am unsure of some intricacies ...
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3answers
82 views

office power just surged, why can't I connect to any FTP?

Normally I wouldn't bother because the problem will surely be resolved shortly, but I thought someone here might know. Our office just had a power surge, but now I can't connect to any FTP servers. ...
3
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1answer
1k views

Software to measure power draw of HP Server

I'm after some software to measure the power draw of a HP Server, namely a DL360 series. I know Nagios is used for logging and monitering but I'm not sure if it logs power usage as well. I've also ...
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4answers
5k views

How to power on a system automatically when AC Power is back and it was powered off properly?

I have a system in which I have no access to the power button, so I need it to power on automatically. I have set the 'restore on AC Power Loss' option and it works fine when I turn off the system ...
2
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1answer
450 views

MGE UPS Cut power - What happened?

I have 3 x MGE Pulsar M 3000 2700w UPS units within my server room which have run perfectly up until now. On Saturday morning I noticed that one of these UPS units was no longer outputting power, ...
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3answers
2k views

Data Center Power Draw Calculation

I have a difficult time calculating the power draw of our upcoming server (Dell R710) and what that means in terms of how a data center will calculate power costs. Hopefully you can help shine some ...
2
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3answers
333 views

Monitoring server room power

I'm looking for a good way to audit the per-rack power utilization in an existing server room. Each rack is powered, for the most part, by a pair of single phase 30A/208v feeds. Is there something ...
2
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1answer
697 views

Will a 20 Amp Circuit Work for 2 servers with 2 PSU ea. needing 9.2 Amp Input Requirement per PSU?

I'm a bit new to the power calculations for electricity at a colocation facility. I have 2 HP DL580s that are pretty maxed out and this is what the HP power calculators gave me for each server. Total ...
0
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4answers
361 views

Should we leave our Xerox Phaser on, or turn them on only when we need them?

Looking for where the cutoff is for keeping the Phaser on, or turning it off. We have a Xerox Phaser 8550 - and we print to it about once a week. However, we feel like it is burning through a ton of ...
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1answer
691 views

The best “performance per watt” (MFLOPS/W) for CPU and GPU for the moment

What are the best "performance per watt" (measured in MFLOPS/W) for current CPUs and GPU's? I hear it is near 500 MFLOPS/W for entire computer ( www.green500.org ), but What is the current record for ...
3
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2answers
176 views

Is an EPO required on each rack

I've studied the NEC 2008 version and I can't find any requirement for an EPO to be mounted on each rack. For some reason the place I work requires them at the top of the rack and it's connected to ...
0
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3answers
524 views

Does cpu consume power differently while executing instructions and while being idle?

Why does a CPU consume different quantities of power at 2Ghz when it is executing an instruction it is not executing any instruction Should'nt the CPU be consuming same power irrespective of ...
2
votes
2answers
828 views

APC switched rack PDU: Startup outlet state

I have an APC Switched Rack PDU powering a number of servers in a remote datacentre. After a recent power outage, I noticed that the outlets did not automatically default to the On status once power ...
1
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1answer
300 views

In equipment with dual PSUs, how is power draw balanced between them?

In equipment which has dual power supplies - e.g. a server - how is power draw balanced between them? Will they be "active/active", with load evenly spread between both PSUs? Or will they be ...
3
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3answers
377 views

Does a Redundant Power Splitter Exist?

We have two UPS units in our data center. All of our servers and network equipment have dual redundant supplies, one plugged into each UPS. We recently had a failure of one UPS. The servers and ...
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3answers
2k views

Server automatic power On/Off

How can I automatically power off a server at 20.00pm and turn It On again at 8.00am in the morning? Is there any sw or hw tool that makò me able to schedule On/Off time? The server could be anything ...
2
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2answers
42 views

SQL Server 2005 I/O Restrictions

We have a few databases on the server. One database is tied to an application that likes to spike the I/O and processor to high levels. Is there a way to limit one of the databases to less ...
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2answers
374 views

Network Printer Connection Using POE Switch

Is there any problem connecting a network printer to a POE switch?
0
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3answers
263 views

Why does a power trip “disable” internet connectivity?

At home, we've set up a server with Windows Server 2008 R2. This server provides DNS, DHCP and a number of other services for the network. We have a Cisco Router (not sure about model) that manages ...
7
votes
2answers
4k views

How to step down voltage from 208V to 110V

I have some racks that will be fed by 208V/20A circuits. These circuits will be conditioned and battery-backed by the facility in which these racks will live. 99% of the devices in the rack will be ...
5
votes
2answers
356 views

Will a 300W psu drain more power than a 100W if the system only uses ~80W?

I have a NFS server that is a old mini-itx motherboard with two 2.5" drives and a no optical drive. Atm. this is powered by a external 100W psu, but I estimate it only need/uses between 60-80W. This ...
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vote
2answers
361 views

Power outage, Server 2K3 remains on “applying computer settings”

My reward for clicking the "test" button in the APC UPS software was that it completely cut the power to my SQL server. The server promptly rebooted, the SQL service is running (verified by the app ...
12
votes
4answers
686 views

What *exactly* gets screwed when I kill -9 or pull the power?

Set-Up I've been a programmer for quite some time now but I'm still a bit fuzzy on deep, internal stuff. Now. I am well aware that it's not a good idea to either: kill -9 a process (bad) ...
7
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8answers
835 views

Datacenter Power Consumption Table

Does anyone know of a good centralized resource that contains a consolidated list of server specifications relevant to the data center? Looking for Rack U sizing, power consumption, etc. for ...
8
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2answers
248 views

“Zinc Whisker” issues?

Good morning; We've been having intermittent power supplies failures in our data center that have been preliminarily attributed to "zinc whiskers". I'm just starting to read about them (I just ...
4
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1answer
2k views

PDU says to ground to rack with “thread making screw”.. this is impossible?

I'm trying to use the 'thread making screw' to ground my Dell PDU to the Rack, however the metal on the rack is impossibly hard. Is this even required? The included screws don't even seem "thread ...
6
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6answers
485 views

Will wear induced by turning computers off in the evening be offset by energy savings?

I'm asking this here because this is primarily a huge office scenario and administrators will more likely have the answer I'm looking for. Employees' desktop computers can be either left turned on ...
6
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5answers
4k views

Cheapest way to remotely control 120v outlet via ethernet?

What is the cheapest solution to be able to remotely power cycle a regular 120V outlet via ethernet? I've seen solutions like iBoot, but they're really expensive. Is there a cheap way to remotely ...