http://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/raid-config.html raid 0 and 1 are thecommon types. Raid 5 and 6 are not recommended because of the extended stripe. If you encounterthis question on the exam I suspect the answer options will be different. Raid 1 Disadvantage Does not provide a write performance improvement; requires more Amazon EC2 to Amazon EBSbandwidth than non- RAID configurations because the data is written to multiple volumessimultaneously.