https://github.com/007revad/Synology_SHR_switch
You need 3 or more SSD drives to use RAID F1.
I don't know which consumer Synology NAS models enabling RAID-F1 will work on. I've only checked DS1821+ and DS920+.
DS1821+ with 3 WD NVMe drives in RAID-F1 (E10M20-T1 enabled with...