I know you can do this in software on RHEL and also in Windows.
Is there a way to do this on an ESXi 5.1 Server?
Thanks!
No, there is no way to software RAID from within ESXi.
RAID 1 - definitely not. A sort-of RAID 0 can be done (datastore with extents), but nothing more. Use a hardware RAID controller for that.