CM4 SATA NAS by mebs_t
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This Compute Module 4 carrier board design exposes a subset of the CM4’s interfaces, including its single PCIe gen 2 lane to accept an external SATA controller card. This design is based off of the official Raspberry Pi Foundation’s CM4 IO board (the KiCad project is available on the IO board official page).
The project includes PCB Gerber files you can have printed, and a Thingiverse case design that holds the board, a fan, up to 4 3.5” hard drives, and an optional OLED display for NAS statistics.