The power-management tag has no wiki summary.
5
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3answers
73 views
Open source DCIM stack?
Our 500-server data center is growing quickly and my manager has started investigating using a specialized Data Center Infrastructure Management (DCIM) package to help manage constraints.
DCIM ...
0
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2answers
110 views
When buying a rack-mount server and renting space, what's more important? [closed]
If I'm buying a server, if I consider the price/performance ratio for buying more rack space, or buying more powerful servers, which is more inexpensive? Getting the most powerful box and saving a ...
4
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1answer
63 views
How does a CPU ever go Idle enough to enter deeper C states?
Even if no user process is running, don't the kernel processes keep the CPU active enough so as to prevent it from entering a deeper C state like C1 or C2 ?
0
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5answers
189 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 ...
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2answers
114 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 ...
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0answers
28 views
How do I get my disks to spin down after one hour? [migrated]
I'm currently configuring a new home server, and I am trying to get the disks to spin down after one hour. But they do not spin down.
Setup
I have my entire system on an ssd: /dev/sda. I have three ...
4
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1answer
147 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 ...
3
votes
1answer
158 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 ...
2
votes
1answer
81 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
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1answer
68 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
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0answers
56 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 ...
2
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2answers
727 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
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1answer
70 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
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3answers
224 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
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3answers
88 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
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2answers
69 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
49 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 ...
1
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1answer
393 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
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2answers
81 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 ...
0
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2answers
79 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 ...
2
votes
2answers
147 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 ...
0
votes
1answer
98 views
enable power management on Ubuntu Server
I have Ubuntu Server 11.04 installed on an old noisy laptop. Its only purpose is to run subversion and I commit code quite rarely, but the laptop should work all the time.
So I would like to know how ...
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7answers
225 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
513 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 ...
21
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5answers
1k 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 ...
1
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2answers
164 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
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2answers
60 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
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1answer
270 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 ...
0
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0answers
35 views
Enable power management on KDE via command line
I need to make my fedora 13 computers, running KDE, sleep after 30 minutes of inactivity. This needs to be done on a system basis (rather than per user basis). The solution also needs to be command ...
1
vote
5answers
407 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 ...
0
votes
1answer
227 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
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1answer
258 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
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2answers
302 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
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1answer
169 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
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4answers
355 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
265 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 ...
2
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5answers
471 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
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4answers
408 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 ...
5
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4answers
652 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
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2answers
212 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
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3answers
212 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 ...
1
vote
1answer
43 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
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3answers
191 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
125 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 ...
20
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2answers
3k 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
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2answers
117 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
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3answers
140 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
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1answer
185 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
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2answers
142 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
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5answers
688 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 ...
