Question about Ubiquiti UniFi UNAS 2

Yes, Ubiquiti offers the option to configure a RAID system; however, the UNAS 2 only supports RAID 1 (mirror protection) with two hard drives. RAID 5 or RAID 6 are not available on the UNAS 2 with a maximum of two hard drives, as these configurations only work with three or four hard drives. RAID 6 functionality was only added with update 4.2.8 for other UNAS models such as the UNAS 4, but not for the UNAS 2. Your UNAS 2 can therefore only be configured for RAID 0 or RAID 1, with RAID 1 being the only option for full RAID protection.