I have your AOC-USAS-H8iR and X7DBN main board. I would like to create an RAID level 6 array using four SAS HDDs, but there has no option for Raid level 6 only Raid level 0 and Raid level 5. What could be the issue?
If you are using the SAS cable with SGPIO sideband cable then you have to make sure the jumper settings on your backplane is at SGPIO mode not I2C mode (default). Please change the jumper setting to SGPIO.