Copy Rootfs

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin Nano
1

Dear all,

I am setting up a toolchain to directly flash an empty SSD on the Orin Nano via command line using the l4t_initrd_flash.sh script. Before flashing, I use the l4t_create_default_user.sh script to set up the username and hostname for each device, which works as expected.

My goal is to replace the sample rootfs in the Linux_for_Tegra directory with the rootfs of a “golden device” that already has all necessary packages and configurations. Ideally, I would set up this golden device on a Jetson, then copy its rootfs back to the host computer for flashing. For this, I’m following the instructions in NVIDIA’s documentation on Flashing Support — NVIDIA Jetson Linux Developer Guide.

However, I’m encountering a few issues. After running sudo ./tools/kernel_flash/l4t_initrd_flash.sh --initrd jetson-orin-nano-devkit nvme0n1p1, I am able to connect via SSH using the device’s MAC address, but the root password does not match the one I set. Additionally, I’m unsure why initrd mode is required just to copy the rootfs with dd—could I skip that step and run dd directly?

Furthermore, my understanding is that system.img.raw will be the full size of my SSD (512 GB), but I don’t have a USB drive of that capacity. Is there a simpler way to only copy the rootfs (excluding blank space) and replace the sample rootfs on the host system?

Thank you in advance for any guidance!

3

Hi jetsonUser99,

Are you using the devkit or custom board for Orin Nano?
What’s the Jetpack version in use?

Please just use serial console to access the board instead of SSH.

It seems it will only copy the actual size of your current rootfs used.
You can just refer to the instruction and check the size of system.img.raw.

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