mi rispondo da solo nel caso la questione potesse interessare a qualcuno.
.......some motherboards have a RAID mode, which includes all the features of AHCI mode but also adds support for configuring highly available sets of disks. You should always choose RAID instead of AHCI, as it gives increased flexibility for the future, even if you don't intend to use RAID initially. By choosing RAID mode, you'll avoid configuration problems if you later want highly available disks
