(Sorry if this is off-topic - technically this is a home workstation setting, but is regarding mostly-server technology.)
I have a GA-X79S-UP5-WIFI motherboard and four ST3000DM001 drives, and the IRST manager isn't letting me put the drives in a RAID (it lists them, but the option to select the C600-series controller is simply grayed out).
Have I done a mistake? Do I need SAS drives to RAID them on the SAS controller?
Apparently, it's possible to just create the RAID array on a different controller (e.g. SATA) and plug the drives into the SAS controller's SATA ports. The array will be recognized. I can only explain the inability to create a RAID array on the SAS ports as an IRST bug.