@scottalanmiller , the H200, H310 and IBM M1015 using the same chipsets are real raid controllers just without caching or BBU. They're entry level devices meant for entry-level servers but are widely sought after for those running software "raid" (i.e. BTRFS, ZFS, and mdadm) due to their ability to be used in IT mode.
I have created Raid 5, 6, and 10 arrays on these units and imported them successfully on other, more feature complete, controllers such as the H710 and P420.