So you have the AHCI Capable SATA Controller is set to Enabled, SATA Mode is set to RAID Mode and RAID Mode is set to Intel ® ESRT2 (LSI(TM)) or Intel ® RST (Matrix), correct?
If a RAID Volume has not previously been created, it's necessary to Save and Exit and reboot in order to create a RAID Volume.
Are the SATA HDDs direct connected, or are you using a hot swap backplane, or expander backplane?
If using a backplane, can you try direct connecting the HDDs?
John