For most of you, SQL Server Central’s new article, RAID and Its impact on your SQL performance will be more than you ever wanted to know about a redunant array of independent disks (yes, I know that the “I” in RAID is somewhat disputed. Independent, Inexpense, InanotherlifetimeIwillcare.)
If this isn’t geeky enough for you, make sure to check out the comment at http://www.sqlservercentral.com/Forums/Topic1292935-143-1.aspx
This table summarizes the pros and cons of each of the Standard RAID Levels
| RAID Level | Fault Tolerance | Read Performance | Write Performance | RAID Write Penalty | Cost |
| 0 | None | Good | Excellent | 1 | Excellent |
| 1 | Good | Good | Good | 2 | Fair |
| 5 | Fair | Good | Poor | 4 | Good |
| 1+0 | Excellent | Excellent | Excellent | 2 | Poor |
| DP | Good | Good | Terrible | 6 | Good |