Raxda ROCK Pi 4 is a single board computer (SBC) powered by Rockchip RK3399 hexa-core processor and inspired by Raspberry Pi 3 Model B+.
The company has now designed ROCK Pi SATA HAT expansion board to design 4-bay NAS based on Raspberry Pi 4 and ROCK Pi 4.
There are 3 models with support for 2, 4 or 5 drives:
- Dual/Quad SATA HAT connected over two USB 3.0 ports and working with both boards
- Penta SATA HAT connected over PCIe and compatible with ROCK Pi 4 only
![](https://www-cnx--software-com.cdn.ampproject.org/i/s/www.cnx-software.com/wp-content/uploads/2019/12/4-Bay-NAS-Raspberry-Pi-4-Large-1024x486.jpg)