System doesn' recognize the Intel AHCI 6Gb/s SATA integrated controllers

Hello,

I'm working on a R7910 released with the Intel AHCI 6Gb/s SATA controllers (no external controllers) with 4 HDD connected.

I updated iDRAC and BIOS to the latest available release.

The issue is that the system doesn't recognize the controller (message is  <RAC0503: There are no out-of-band capable controllers to be displayed>.

I also set in the UEFI the embedded SATA parameter to <OFF> but in all the cases the system cannot see the disks connected to the mother board so I cannot install the O.S.

How I can set the BIOS in order to make visible and available the HDDs?