The installed SATA drive can share SAS dual-port advantages for higher reliability
The QDA-SA3 adapter is designed for QNAP's dual-controller all-flash array Enterprise ZFS NAS and allows the usage of a SATA 6Gbps drive in a 2.5-inch SAS 12Gbps/6Gbps drive bay - providing the ability to expand storage capacity with cost-effective SATA drives.