At MIS2007 we had a database RAID discussion: RAID 5 or RAID 10 for databases from 5 GB to 5 TB. Almost everyone picked RAID 10, even though it costs more.
SQL SERVER – Raid Configuration – RAID 10
Which RAID do I use for my SQL Servers? RAID 10. It gives great read and write performance, while RAID 5 pays a write penalty for parity.




