Just because it's a SAN doesn't mean a given abstract block device from it is backed by RAID. It's literally just a multiplexed and QoSed network-attached storage cluster.
I actually prefer the lower-level abstraction: if you want a lower failure rate (or higher speed), you can RAID together attached EBS volumes yourself on the client side and work with the resultant logical volume.
I actually prefer the lower-level abstraction: if you want a lower failure rate (or higher speed), you can RAID together attached EBS volumes yourself on the client side and work with the resultant logical volume.