System Migration Instructions:

# Temporarily mount external storage without modifying /etc/fstab. If the system shows the message “Information: You may need to update /etc/fstab.”, it can be safely ignored.

# Set the external storage to GPT format.

# This document uses a TF card as an example device name in Jetson systems. The external storage device name (e.g., “/dev/mmcblk1”) should be adjusted according to the actual device name in your system.

sudo parted /dev/mmcblk1 mklabel gpt

# Create a new partition on the disk

sudo parted /dev/mmcblk1 mkpart primary 0GB 512GB

# The 512GB value can be adjusted according to the actual storage capacity

# Set PARTUUID for external storage

sudo gdisk /dev/mmcblk1

# During this step, you need to enter commands and set the GUID (PARTUUID) as follows:

nvidia@nvidia-desktop:~$ sudo gdisk /dev/mmcblk1

GPT fdisk (gdisk) version 1.0.3

Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: present

Found valid GPT with protective MBR; using GPT.

Command (? for help): x # enter lowercase x to access expert mode

Expert command (? for help): c # set GUID for the partition

Using 1

Enter the partition's new unique GUID ('R' to randomize): 82c4471a-fac6-4f3e-a829-4fb9700d1205

New GUID is 82C4471A-FAC6-4F3E-A829-4FB9700D1205

Expert command (? for help): w # write the GUID to the partition

Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING PARTITIONS!!

Do you want to proceed? (Y/N): Y

# Confirm with uppercase Y to proceed

OK; writing new GUID partition table (GPT) to /dev/mmcblk1. The operation has completed successfully.

# At this point, the PARTUUID has been successfully assigned.

nvidia@nvidia-desktop:~$

# Verify the PARTUUID

sudo blkid /dev/mmcblk1p1

# If the following output appears, the configuration is successful:

# PARTUUID="82c4471a-fac6-4f3e-a829-4fb9700d1205"

# Format the disk

sudo mkfs.ext4 /dev/mmcblk1p1

# Mount the disk to /mnt

sudo mount /dev/mmcblk1p1 /mnt

# Copy all system files to the mounted directory. Ensure the disk is mounted before executing this command.

sudo rsync -axHAWX --numeric-ids --info=progress2 / /mnt

# This completes the disk cloning process. If migrating additional disks, repeat the above steps.

# For first-time system migration, perform the following steps in the x86 host flashing environment:

cd /Linux_for_Tegra/bootloader/

echo 82c4471a-fac6-4f3e-a829-4fb9700d1205 > l4t-rootfs-uuid.txt

echo 82c4471a-fac6-4f3e-a829-4fb9700d1205 > l4t-rootfs-uuid.txt_ext

# Put the Jetson device into recovery mode

# Flash the boot partition using the following command:

cd /Linux_for_Tegra/

sudo ./flash.sh external

# Wait for flashing to complete