The tag has no wiki summary.

learn more… | top users | synonyms

17
votes
1answer
1k views

Why does unpartitioned Hitachi HDS5C3020 drive start consuming 50% more power 15 minutes after boot?

In a Debian 6.0.6 system there are 74 pieces of 2TB Toshiba DT01ABA200 drives. These drives are identified as Hitachi HDS5C3020BLE630 drives running firmware revision MZ4OAAB0. 64 Drives attached via ...
1
vote
2answers
254 views

iSCSI NAS supporting VMware Esxi 5.1 servers in a software development environment [closed]

I would like to build (or purchase) the smallest, quietest most energy efficient servers that I can for a low demand environment. These would only have a small disk for guest swap files, a CPU (XEON ...
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 ...
7
votes
3answers
2k views

Will spinning down hard disks create Linux Raid problems?

I'm setting up a server that will need to be accessible 24/7 but will be rarely accessed (archive storage). To save heat/power, I'm thinking of setting hard disks to spin down using hdparm. However, ...
1
vote
1answer
347 views

OpenSource management tool for measuring and reporting on power efficiency of Servers

I would like to measure the power efficiency of servers (virtualized) using an opensource management tool like Nagios or OpenNMS. Cacti also might be useful for it's historical graphing capabilities, ...
7
votes
6answers
5k views

Which is better - 30 AMP 220V circuit or 60 AMP 120V circuit

I'm looking for advice on which electrical service I should have run to a rack that I have in a data center. The price is the same for either a 30 AMP 220V circuit or a 60 AMP 120V curcuit. I ...
0
votes
4answers
132 views

How to retrieve the list of powered on workstations?

People in the office usually keep their workstations on during the night. I'm planning to do a power save there so I want to make sure I'll be able to talk directly to the owner of the workstation if ...
2
votes
3answers
2k views

Dell PowerEdge: powersaving BIOS settings differences

I'm closing in on purchasing a Dell PowerEdge R710 rack server and am curious to know the difference between Dell's power saving bios setting and their performance bios setting. Should I be concerned ...
2
votes
4answers
727 views

How do I know how much power a server will need - for colocation

I'm trying to figure out my colocation needs and one requirement is the power usage of a server. Most colocation providers give you the option of between 0.4 and 1 amps per U server. How should I go ...
2
votes
7answers
2k views

Power and Cooling Cost compared with Server/Hardware Cost

Has anyone done, or is aware of any, calculations to compare the cost of power and cooling compared to the cost of hardware (servers) in a typical data center? This is to compute a true total cost of ...
1
vote
4answers
284 views

Do idle media drives consume any significant amount of power?

I'm turning a workstation into a internal mediawiki webserver for my small business (limited budget and too many workstations). The workstation has both a CD and floppy drive, neither of which are ...
3
votes
6answers
5k views

Redundant Power Supplies and UPS (Dell Servers)

I have a number of Dell 2950 servers with two power supplies. In normal usage how are the PSU's utilised? Do they both draw '50%', only switching to 100% if one of them dies? Does one supply provide ...
4
votes
4answers
12k views

Power consumption of a computer in sleep mode?

How much power do (relatively new) computers consume while in sleep mode? By sleep mode, the computers' fans are turned off, producing no noise; and the LED on the power button blinks. Do I need to ...
2
votes
5answers
1k views

Server & Workstation Power Consumption - obtaining programmatically/via script

I'm looking for a generic way to query a network of Windows PCs (XP/Vista/7/Server 2k3) for their current power consumption - ideally in Watts! I'm sure this kind of thing is built into WMI, but it ...
8
votes
4answers
11k views

How do I calculate cooling cost per server?

I'm attempting to figure out the power/cooling draw for some old servers that I'd virtualized. Starting with info in this question, I've taken the 880W the old boxes appeared to be drawing (according ...
2
votes
4answers
215 views

Power Supply Calculator

When building a new PC, I sometimes struggle to determine what capacity (watts) power supply to use. Is there some sort of online calculator that exists that allows you to choose your various ...