ROCK Pi SATA HAT Targets ROCK Pi 4 & Raspberry Pi 4 NAS

Radxa 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




  • 2x or 4x SATA connectors supporting 2.5″ or/and 3.5″ HDD/SSD
  • 2x USB 3.0 port to connect to RPi 4 via one or two JMS561  USB to SATA controllers
  • Storage Features – HDD suspend mode, UASP, software RAID 0/1/5
  • Misc
    • Fan and heatsink header for Raspberry Pi 4 CPU cooling
    • Optional PWM control fan for HDD heat dispatching
    • Optional OLED display for IP Address/Storage info
  • Power Supply
    • 1x USB Type C power input with USB PD/QC to power both the SBC and 2.5″ drives
    • External standard ATX power supply support for 3.5″ HDD

You can see the Raspberry Pi 4 connected to four 3.5″ SATA drives plus an external power supply (60W+ required), and Raspberry Pi4 connected to 4 2.5″ drive plus the SATA HAT Top Board with fan, a power button, and an OLED display to show information such as  IP address and storage information.

4-Bay NAS Raspberry Pi 4
Click to Enlarge

The company provides a utility to control the top board:

The system can deliver up to 400MB/s sequential reading/writing performance with four disks in RAID0 mode. You’ll find additional details in the Wiki.


Rock Pi Penta SATA HAT

The penta SATA HAT does not work on the Raspberry Pi 4 because it relies on the M.2/PCIe interface on ROCK Pi 4 to offer up 5x SATA ports, namely up to four SATA port, and one eSATA port for external drives.


  • 4x SATA interfaces + 1x eSATAp for up 100TB storage via 5x 2.5″ or 3.5″ HDD/SSD
  • Host Connection – Flat cable with 2-lane PCIe 2.1 via JMB585 PCIe to SATA controller
  • Storage Features – HDD suspend mode, software RAID 0/1/5
  • Misc
    • Optional PWM control fan for HDD heat dispatching
    • Optional OLED display for IP/Storage info
  • Power Supply
    • 1x USB Type C power input with USB PD support for both 2.5″ HDD/SSD and ROCK Pi 4
    • External standard ATX power supply support for 3.5″ HDD

Rock Pi 4 5 SATA + eSATA drives

Rock Pi 4 SBC connected to five 3.5″ SATA hard drives, including on eSATA drive. Performance is quite better over the USB solution for the first design, as the Penta SATA HAT can achieve up to 803 MB/s with 5 SSD’s attached in RAID0 mode. Check out the Wiki for more information.

RPi 4 NAS Enclosure

This is all good, but if you don’t quite feel making your own case, Radxa will also offer the one shown below.

Rock Pi 4 4-Bay NAS
Rock Pi 4 4-Bay NAS – Coke Bottle for Scale

The SATA HAT Top Board (with fan) is supposed to be at the top of the NAS, so maybe they could consider some ventilation holes at the top as well.

At this stage, we do not have availability nor pricing information, but it will certainly be cost-effective. [Update: the boards and kit can now be pre-ordered as follows:

  • $25 Quad SATA HAT for Raspberry Pi 4 / Rock Pi 4
  • $49 Penta SATA HAT for Rock Pi 4
  • $8 SATA HAT Top Board
  • $99 for Quad SATA kit for Raspberry Pi 4 with enclosure. Raspberry Pi 4 not included.

See comment for purchase link]

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