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I am currently configuring RAID 10 (first time doing RAID ever) for a server at work. In the Configuration Utility. I am given the option of either span 2 or span 4. Having never done this before, I was curious if someone could tell me the pros and cons of for each span? Thanks

The server is a Poweredge r620 with a PERC H710 mini (Security Capable) RAID controller. I have 8 600GB hard drives. I am creating this server as a network storage drive. I have SQL server historian database whose 1TB storage filled up and after 5 years of logging data.

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What's the server and RAID controller make/model? – MDMarra Dec 10 '12 at 16:45
up vote 1 down vote accepted

Span 2 is the more common approach. Striped sets of mirrored-pairs. Of course, you should let us know how many disks you have.

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I imagined that Span 2 is more common because it was the default, but what is the difference between the two? Is one better than the other? – LaDante Riley Dec 10 '12 at 17:03
I think it's the difference between 2-way mirrors and 4-way mirrors. How many total physical disks do you have? – ewwhite Dec 10 '12 at 17:17
8 total physical disks – LaDante Riley Dec 10 '12 at 17:18
Yeah, then it's 2-disk pairs, striped across 4 sets, or 4-disk mirror striped across 2 sets. – ewwhite Dec 10 '12 at 17:20

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