Discontinued Raspberry PI CM4 Quad SATA Support Board Becomes Open Source Hardware


The Wiretrustee Carrier Board for Raspberry Pi CM4 was unveiled about a year ago with four SATA connectors to help people build their own 4-bay NAS. Unfortunately, the company decided to stop the project due to the situation in the semiconductor market.

The good news is that the board is now open source hardware with all publicly shared resources including Allegro schematics and PCB layout, Gerber files, 3D models for the heat sink, and enclosure designs for the drives. 2.5 inch or 3.5 inch. All files are available under “CERN Open Hardware License Version 2 – Permissive”.

Here is a little reminder on the specifications of the Wiretrustee card:

  • Supported SoM – Raspberry Pi 4 and 4 Lite Compute Module
  • Storage
    • 4x SATA 2.0 via Marvell 88SE9215 (PCIe 2.0 x1 to 4 SATA 6Gb / s ports, no hardware RAID)
    • MicroSD card slot
  • Video output – HDMI 2.0 up to 4Kp60
  • Networking – 1x Gigabit Ethernet port
  • USB – 2 USB 2.0 ports
  • Miscellaneous – 4 pin fan, RTC + battery, external control board connected via FPC cable with more LEDs, reset and power buttons.
  • Power supply – 5V via USB-C port up to 5A max, or 12V / 5A via 4-pin connector
  • Dimensions – 100 × 100 mm

While in theory you can build your own, the project was scrapped due to supply issues, I’m guessing mostly due to lack of supply for Raspberry Pi CM4 modules, but maybe because of Marvell 88SE9215 (TBC), which means the board may need to be changed with a new PCIe to SATA chip unless you plan to manufacture the board in 2023… There are pin-to-pin alternatives to the Raspberry Pi CM4 like Radxa CM3 or Pine64 SoQuartz, but I don’t think the software is there yet.

By the way, Wiretrustee is still running but is focusing on a completely different project: a Wireguard-based peer-to-peer open source VPN project designed to “make it easier to build secure private networks for your organization or home.” If you are interested, you will also find it on Github.

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