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0
votes
6answers
637 views

How to protect power strips from accidental shut-offs/“cleaning lady” attack?

Are there any power strips or products designed to defend against a "cleaning lady" attack (cleaning crew is vacuuming the floor and bumps the power strip switch, turning off all the connected ...
3
votes
3answers
2k 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 ...
6
votes
5answers
7k views

automatically shutting down an ESXi host nightly

We just picked up a new development server that I've loaded ESXi on. The room it's in is well ventilated during the day but at night the door is closed and it gets quite toasty in there. I've been ...
4
votes
1answer
1k views

How do I inform my ESXi 5 host(s) of a power outage?

My APC UPSs all have the APC SNMP card so they are able to communicate over the network. From what I've been able to find the PowerChute program alerts the guest OS that a power outage has occurred ...
4
votes
1answer
587 views

How to DISable display sleep on Dell PowerEdge R310

The display on these PowerEdge systems goes to sleep after some period of time. Normally, when you plug in a KVM, you have to press a key to "wake up" the display. I'm connecting these servers to a ...
3
votes
1answer
187 views

Turn server back on after power loss with FreeBSD

I have a VIA M'SERV S2100 with FreeNAS 8. Since I upgraded from FreeNAS 7, the M'SERV no longer turns back on after suffering a power failure. As I remember it, there was a setting for it in the old ...
0
votes
1answer
126 views

What tools are available to sleep desktops at night to save power?

Many companies have desktops that are on 24/7, but are not likely to be used between, say, 6:00 at night and 7:00 in the morning. How can we schedule them to sleep, wake up before the user is likely ...
0
votes
0answers
170 views

Ubuntu power management logfiles? Forensics (maybe?)?

I'm in the unfortunate position where I need to determine what happened to a remote server of ours. I only have SSH access to it and it's a netbook running ubuntu 10.04 32 bit. It dropped offline for ...
4
votes
3answers
16k views

How to disable all power management in Ubuntu (for a server netbook)?

I need to disable everything related to having the netbook-server go into sleep/hibernate/shutdown. Spinning down the disks during inactivity is fine, but it is crucial that the machine remain in a ...
0
votes
1answer
409 views

How to put laptop to sleep with powershell/vbs/wmi/…?

I'd like to be able to put my laptop to sleep from the command line. According to Microsoft, the Win32_Battery WMI class has a SetPowerState method that looks like it should be able to do this, ...
3
votes
3answers
340 views

Proof that hibernating the server over the weekend is not a good practice

Is it true that the life of the modern server machines is longer if you never turn them off instead of turning them off when not needed? I am talking about database server machines that are not used ...
3
votes
3answers
302 views

Testing UPS output for 'clean' power

Is there any way to test the 'cleanliness' of the power your are getting at your PC from the UPS and also from the wall? I have a powerful workstation (Dell T7400) that is now on its 3rd PSU in 30 ...
1
vote
2answers
200 views

Hibernating servers

Is there any drawback hibernating - database - servers during night and the weekend? We think that it is a good way to save machines and power. Is it possible that daily hibernation can be harmful ...
2
votes
1answer
82 views

Testing power consumption

I'm buying an UPS for the new server. As always, money is short, so I need to buy one which is sufficient, but not needlessly overpowered. The server has a 900 W power supply, but the retailer says he ...
0
votes
2answers
5k views

Power management over IPMI and HP iLO2

I tried to reboot server over IPMI and the integrated service processor/BMC. It worked for IBM server with an Integrated Management Module (IMM), but failed with HP iLO2 (FW v2.05). I used ...
2
votes
2answers
399 views

A/B Power Configuration for Server Cabinet

I'm upgrading our cabinet at our colocation for A/B power and wanted input on which of our options are good or bad. First, a bit of an overview of our setup: We currently have a single circuit feed ...
1
vote
2answers
887 views

Problem loading cpufreq module

I'd like to install cpufreq modules on my server . I tried sudo modprobe acpi-cpufreq but got the error FATAL: Error inserting acpi_cpufreq ...
3
votes
2answers
283 views

Power reading 2 amps with 13 servers?

We have a rack in a data center and we became suspicious of running out of power. But our power bar says 2 amps! It has a live indicator, so it's not just one reading. Do you think there's something ...
-1
votes
7answers
349 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 ...
1
vote
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 ...
23
votes
6answers
4k 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 ...
4
votes
2answers
1k views

Get drive power state without waking it up

Is there any way how to determine whether some drive is sleeping without occasionally waking it up? I have tried hdparm -C and smartctl -i but both of them actually wake it up when its already ...
0
votes
2answers
93 views

Battery backup for Workstation & Printer

I have been tasked with finding a price for a battery backup solution for our printers. Each printer is listed at 240v 24a <5.5kW and each workstation is using a 500w power supply. We are ...
0
votes
1answer
561 views

linux hibernate working but slow

I've set up pm-hibernate on AMD and one older Intel platform. But this perticular one is giving me more trouble than usual. Issuing pm-hibernate works but hangs for a long time before finally shutting ...
1
vote
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 ...
1
vote
2answers
3k views

Command to disable windows 7 sleep

Normal way to disable Win7 sleep is to go to Power Management and find current power profile, then select never for sleep option. However, I was wondering if there's any way to do this in command line ...
0
votes
1answer
576 views

what are the ways to retrieve Power measurements of a Dell cluster (lot of questions)

I have to get power measurements of a dell cluster (Linux OS) running a specific workload , with an interval of 1 second (retrieveing power values every second) . I can either use Windows or Linux as ...
1
vote
2answers
1k views

Monitoring Power on Dell Cluster using SNMP

I have to monitor/collect Power Values of a dell cluster remotely using SNMP . I have very little experience regarding this. Could anybody guide me through , step by step on how to collect or maybe ...
0
votes
1answer
587 views

SNMP based network discovery (switches), device (ports on switches) power management

In a enterprise network, what would be the right way to generate a list of switches (SNMP managed) Is it reasonable to ask the organization to supply a list such as this: Switch name IP Address ...
0
votes
4answers
4k 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
votes
1answer
662 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 ...
4
votes
5answers
2k views

Will 208v Hurt My Servers?

I've decided to move most of my servers out of our closet at work and into a datacenter. All of our servers are 110v, however we're starting to purchase some new ones, and the datacenter tech ...
0
votes
4answers
2k views

When HDD wakes up?

Im looking for some small script or application which could log the time when a non-system disk wakes up. I cannot identify which application or script wakes up my non-system drive (which has to be ...
6
votes
4answers
11k views

Why do I need a raid battery pack?

I'm trying to understand why one would add a batterypack to a raid card. It seems to me like if power goes down, running just the raid card is going to do little good: without power for HDs and ...
0
votes
2answers
779 views

Where do I put a startup and shutdown task?

I have written the below program to notify me by email when my Linux system has been rebooted from a power failure. The way I do this is enableing power-fail recovery in the BIOS, and then register ...
0
votes
3answers
412 views

Send notification after powerloss resume?

Question: I've set the BIOS of my server to automagically resume the last state (running/switched off) after a powerloss. Now, how can I send myself an E-Mail when the system has resumed after a ...
2
votes
1answer
70 views

Is Ondemand Governor enabled in current HPC clusters?

Will enabling Ondemand GOvernor on HPC cluster help save power ? Are sleep states (C-states) enabled in HPC platforms ? If not, what is the reason behind this ?
0
votes
3answers
485 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 ...
0
votes
1answer
228 views

How does a power graph of a server running a job look like when there is no CPU power management mechanism deployed

Suppose there is no CPU power management mechanism deployed in a server, and i run a job on it and monitoring the power drawn by the server by using a wall power meter, what kind of a profile do you ...
25
votes
2answers
6k views

Disable CPU Scaling in Windows Server 2008 R2

How do you disable CPU power management scaling in Windows Server 2008 R2? After setting the Control Panel, Power Management plan to performance and then rebooting -- CPUID's Cpu-Z still shows the ...
0
votes
2answers
187 views

What is the OSPM Power management feature in current HPC clusters?

What does the operating system do in ordder to manage power in current HPC clusters ? What are the functionalities embedded in current HPC clusters in order to save power
1
vote
3answers
237 views

Lower power usage / noise

I do computational biology and I have a pretty heavy-duty setup sitting right next to my bench. It includes the following: 1x HP ProLiant DL385 G7 Server w/ 2x 12-core AMD Opteron processors (6174, ...
1
vote
1answer
662 views

Individual Hard Disk Power management under WS2008R2

Are Hard Disks are controlled individually under WS2008R2? meaning one HD is running 24/7 with database requests while another is spun down after 20mins until the automated monthly backup occurs. ...
1
vote
2answers
236 views

Software/Service for Controlled Shutdown/Startup of a Server Room

We are looking for a solution to automatically shutdown server room equipment in a controlled process, based on priority, automatically during a power outage and on demand if necessary. We would also ...
1
vote
5answers
2k views

Why is an UPS needed for a server?

I wounder how important it is to have an UPS for a server. Everyone seems to use UPS for servers but not for client computers. In example, if I use Windows Small Business Server on a small network ...
1
vote
2answers
876 views

How to mearsure the average cpu frequency in linux?

I'm trying to measure the average cpu frequency in an DVFS enabled cpu for specific interval , the obvious way of periodically sampling /proc/cpuinfo has very large variants. The cpufreq-stats driver ...
1
vote
4answers
4k views

Dell Poweredge power management

I have a Dell Poweredge 840 and the moment it boots up it's fans are roaring full bore regardless of how little usage there is on it - idle speed is 100%. I am running windows server 2003 r2. The ...
1
vote
2answers
297 views

How to measure power usage effectiveness (PUE)

As part of a sustainability project I have been requested to measure the PUE of our server room. We have gross power usage figures from the UPS (and seperate supply meters) but nothing else. How in a ...
4
votes
2answers
1k views

How can I get FreeNAS to respond to libvirt shutdown requests

I have a KVM VM of FreeNAS 0.7.1 Shere (revision 5127) running on Ubuntu Server 10.04 and I'm unable to convince the VM to shutdown from the host virsh shutdown freenas I would expect this to send ...
2
votes
1answer
360 views

How to enable suspend mode on a Windows Server 2008 R2 box?

I want to use Wake-On-LAN for my two office machines, both of which run Windows 2008 Server R2 (for Hyper-V), but it seems the Server SKU doesn't offer a suspend option anyway. I'm sure it's just a ...