3 years, 4 months ago
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
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
Separate topics with commas, or by pressing return. Use the delete or backspace key to edit or remove existing topics.
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$1 Answer
This is a link to an Excel sheet with formulas for calculating RAID requirements:
http://www.cozumpark.com/files/folders/40471/download.aspx
You can also find the formulas used for this online RAID calculator embedded in the javacsript of this page's source, but that may be too cumbersome to be useful:
http://www.ibeast.com/content/tools/RaidCalc/RaidCalc.asp
http://www.cozumpark.com/files/folders/40471/download.aspx
You can also find the formulas used for this online RAID calculator embedded in the javacsript of this page's source, but that may be too cumbersome to be useful:
http://www.ibeast.com/content/tools/RaidCalc/RaidCalc.asp
You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$
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.
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?