My indestructible Synology 209 has lacked updates for a long time and was never a speed demon, so it was time to buy an alternative. It turned out to be an AS1102T, which I filled with 2 x Seagate Ironwolf ST4000VN008 4TB (RAID 1).
In the next days I will be setting up all the functionality (which I used on the Synology) on the Asustor. Maybe I'll run into something and find some supporting info here.