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How to do it...

Only a few RAID levels matter in a database context. Perform these steps to decide which one is right for this server:

If this is an OLTP (Online Transaction Processing) database primarily for handling very high speed queries, use RAID level 1+0
If this is a non-critical development or staging system, use RAID level 5
If this is a non-critical OLAP (Online Analytic Processing) reporting system, use RAID level 5
If this is a critical OLAP reporting system, use RAID level 6
If this is a long-term storage OLAP warehouse, use RAID level 6

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