How To Estimate Watts

Nov 16, 2007

I am looking at some rackmount chassis and most of them come with power supplies included. Most of the 1U that I look at have 250-300watt power supplies.

The way I see it is 2 processors @ 130watts is 260watts right there. Thats not including hard drives, and the motherboard. Am I calculating this wrong because these power supplies seem too small? Also is there any place that lists motherboard and hard drive watts or is there a general industry rule of thumb? Does the number of ram sticks in a motherboard affect how many watts a motherboard uses. Thanks.

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Power Estimate

Apr 8, 2008

how much power the average hard drive would use? (ie a 1tb drive). I was looking on WDC's website and it said 7.5 watts peak durring writing and reading etc, so assuming thats at 110 voltage, would it be safe to assume that 12 drives @ 7.5 watts each would make a total of .81 amps? I am going off of the equation that Amps = Watts/Volts. So amps = 90/110

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Routers..how To Estimate Needs For Colo

Jan 24, 2008

However..it's time to learn.

There is no doubt in my mind I'm going to Houston. The prices they have..it's unreal. Take a look:

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And that's just one. The real fun starts when they start beating each other's quotes.

Ok..on to what need here:

If I have a cage at Level 3..is there a way to estimate routing/switching needs on a per-rack basis? In other words..can you estimate: Ok 1 full rack...say...30 servers..and you're bringing in one of those 100mbps eth drops...to start.

and you want capacity for..say..three more racks from the getgo.

Is there software for this? Or can you guesstimate on ip use-how many ips you think you'll need routing for?

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Estimate My Servers Power Draw

Jul 31, 2007

I just bought the following server

Proliant ML570
4x 2.0GHz Xeon MP
I'm gonna add 3GB of PC1600 ECC RAM for a total of 4GB
I'd like to have the following hard drive config:

2x18 GB 15k RPM in RAID1 for OS (CentOS 5.0)
3x36+ GB 10k RPM in RAID5 for data

However that drive config may suck a lot of power.

The server has 3x600w PSUs, however, if I keep it under 6 drives, I can set up the PSUs in a 1+1 configuration so I would only HAVE to have 1 PSU connected.

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