Thank you for contacting Intel Communities.
Can you please provide the following information to better assist you?
- System Reports for Intel® Rapid Storage Technology
- Report from Intel® System Support Utility
- The brand & full model number of your system (if it is custom made, please provide the brand & model number of the motherboard):
- Was there any software or hardware change before the issue started happening?
Thank you for the information.
In this case, the Intel® RST version installed is not compatible with the motherboard you have.
You may uninstall the Intel® RST from programs and features, restart the computer and then install the Intel® RST version found in the Gigabyte's website, you may select your OS and then expand "SATA RAID/AHCI" option.
In addition, you can perform a verify and repair:
Please let me know how it goes.
as suggested I downgraded the driver to the one suggested by the MB manufacture (GB) 220.127.116.111.
to no avail, the bios sees the HD as perfectly fine (rebuilding), while RST does not recognize the HD (unknown drive on unknown port...) -> degraded