https://github.com/laenzlinger/granit

Custom carrier board for Raspberry Pi CM4/CM5 — minimal offsite backup appliance with JMS578 USB-to-SATA bridge
https://github.com/laenzlinger/granit

backup carrier-board cern-ohl cm4 kicad open-hardware pcb raspberry-pi sata

Last synced: 2 months ago
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Custom carrier board for Raspberry Pi CM4/CM5 — minimal offsite backup appliance with JMS578 USB-to-SATA bridge

• Host: GitHub
• URL: https://github.com/laenzlinger/granit
• Owner: laenzlinger
• License: cern-ohl-p-2.0
• Created: 2026-04-06T22:47:56.000Z (2 months ago)
• Default Branch: main
• Last Pushed: 2026-04-14T19:59:38.000Z (2 months ago)
• Last Synced: 2026-04-14T21:30:38.907Z (2 months ago)
• Topics: backup, carrier-board, cern-ohl, cm4, kicad, open-hardware, pcb, raspberry-pi, sata
• Language: Shell
• Size: 289 MB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

          
# Granit — Offsite Backup Device

Custom carrier board for the Raspberry Pi CM4 Compute Module, designed as a minimal offsite backup appliance.

📖 **[Documentation](https://laenzlinger.github.io/granit/latest/)**

[![Latest Release](https://img.shields.io/github/v/tag/laenzlinger/granit?label=release)](https://github.com/laenzlinger/granit/releases)

## Overview

![PCB 3D Render](https://laenzlinger.github.io/granit/latest/images/granit-3d.png)

A compact, headless device that connects to a remote network and receives encrypted backups

onto an attached hard disk. Designed to be left at a trusted offsite location and managed remotely.

- Raspberry Pi CM4 with PCIe SATA (ASM1061)

- 2.5" or 3.5" HDD/SSD support

- Software-controlled HDD power (GPIO)

- RTC wake for scheduled backups

- USB-C OTG for eMMC flashing

- Hammond 1455 aluminium enclosure

## Documentation

The full project documentation — including schematics, PCB viewer, assembly instructions,

design notes, and downloads — is available at:

**https://laenzlinger.github.io/granit/latest/**

## License

[CERN Open Hardware Licence Version 2 - Permissive](https://ohwr.org/cern_ohl_p_v2.txt)