I'm using Intel RSTe - a fake raid. Intel suggests mdraid (which is software raid utility). Intel does not like dmraid (which is a fake raid utility). (Correct me if I'm wrong)
Intel says it augmented mdraid to support metadata from RSTe.
Now my question is do I need to setup the Raid in the RSTe bios utility, or put the disks in AHCI and then setup the raid in linux?
I personally suggest to set drives as AHCI and use only linux mdadm.
The reason is that if you move your drives to whatever other server, you just use the same mdadm utility and you don't have to care wheras there were some "compatible" metadata before or not.