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connected... connected...
 
January 14, 2009 04:11 PM

How do you calculate a hardware RAID for a server?

I need the actual formula?

I have 4 EA 300 GB drives and they are configured as RAID 5

I have 2 EA 146 GB drives and they are configured as RAID 1+0
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darth cont... darth cont...
 
 January 14, 2009 04:19 PM
This is a link to an Excel sheet with formulas for calculating RAID requirements:
http://www.cozumpark.com/files/folders/40471/download.aspx

You can also find the formulas used for this online RAID calculator embedded in the javacsript of this page's source, but that may be too cumbersome to be useful:
http://www.ibeast.com/content/tools/RaidCalc/RaidCalc.asp
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robbrown robbrown
 
January 14, 2009 04:30 PM
I've got the calculation built into my programmable calculator (I'm a nerd).

I double checked the javascript ibeast.com page and it's right.

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connectedg... connectedg...
 
January 14, 2009 04:56 PM
So,
((DiskSpace*1000000000)/1073741824)/2 is correct for RAID 1+0?
and
(((DiskSpace*1000000000)/1073741824) * ((parseInt(((NumberOfDisks-1)/NumberOfDisks)*10000)/100)/100)) is correct for RAID 5?

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