Many thanks for your reply and hotlink.
Yes, I read both docs but even though the Quick Start guide states "No other SSD caching or AMD RAID solutions installed" StoreMI should not see a RAID 1 as it is controlled solely by the NAS controller and should appear as an external hard drive device, i.e. StoreMI has no knowledge it is talking to a RAID.
Was hoping someone had tried this and could confirm or refute for us.