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41
votes
3answers
1k views

Assessing equipment damage following a lightning strike - Should I have planned more?

One of my client's sites received a direct lightning hit last week (coincidentally on Friday the 13th!). I was remote to the site, but working with someone onsite, I discovered a strange pattern of ...
1
vote
2answers
9k views

How to enable sleep/standby on Windows Server 2012 Hyper V

I know it's possible because sleep works in HyperV under Windows 8. edit: I know this is probably not "supported".
0
votes
2answers
825 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 ...
33
votes
6answers
22k views

How do I permanently disable Linux's console screen saver, system-wide?

I've got an Ubuntu server that boots up in text mode. It rarely has a screen or keyboard attached to it, but when I do attach a screen, I usually have to attach a keyboard too, because the darn ...
25
votes
2answers
7k 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 ...
21
votes
16answers
1k views

How have you saved green by going green?

For the purpose of this question, I am interested in server/datacenter related hardware. Have you had any measureable amount of ROI by swapping existing hardware to more "green" or energy efficient ...
30
votes
9answers
16k views

Does CPU power management affect server performance?

I was doing some simple hand benchmarking on our (live) database server during non-peak hours, and I noticed that queries returned somewhat erratic benchmark results. I had enabled the "Balanced" ...
10
votes
6answers
5k views

Automatic shutdown when idle?

We have about 600 Windows XP PCs in a school of about 2000 students, the majority of the PCs are in ICT suites and class rooms. It is a regular occurance that half of the computers are left on ...
1
vote
2answers
300 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 ...
2
votes
2answers
118 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 ...
2
votes
1answer
687 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
votes
2answers
13k views

How to utilize IPMI on Windows?

My organization is primarily a Dell shop running Windows. Most are recent models that support IPMI 2.0. (Dell 1950, for example). At a minimum I'd like to use IPMI to perform remote chassis power ...
0
votes
1answer
235 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 ...