Back up and Restore System Image on NRU-220S _ JetPack 6.0 Production Release

Prerequisites

• A host computer with L4T environment, e.g., JetPack 6.0 Production Release [link]

• The latest NRU-220S tarball, which could be downloaded from NRU NAS.

• Untar the tarball in L4T folder by

cd $L4T
sudo tar zxpvf nru220_JP60PROD_MP_2024-07-04_1629.tar.gz

The backup procedure of AGX Orin in JP 6.x is slightly different from JP 5.x

• Before backup your system image, or use a pre-built system image, you will have to execute the following command to ensure the flashing environment is properly setup and signed

time sudo ./flash.sh --no-flash nru220-jao32 internal

Backup the System Image

• Turn on NRU-220S, boot into OS, and make sure the NRU-220S is connected to the same local Ethernet with the host computer.

• On NRU-220S, enter the following command

# install CUDA and ACPID
cd /usr/src/nru
sudo ./install.sh

# wait for 20 mins
# reboot

sudo su

# update below parameters
export HOST_IP=192.168.1.67
SYS_IMG_RAW=NRU220_20240704_JP60_PROD
echo u > /proc/sysrq-trigger

# low level backup the whole APP partition (/dev/mmcblk0p1) of AGX Orin
dd if=/dev/mmcblk0p1 | ssh nvidia@$HOST_IP dd of=/e_nvme/$SYS_IMG_RAW.raw status=progress

# After this procedure, you will have a $SYS_IMG_RAW.raw on the root folder(/) host computer

Restore a System Image

• Shutdown NRU-220S, boot NRU-220S into recovery mode [ref], connect the host and NRU-220S with a USB Type A to Type C cable.

• On the host computer, enter the following command

sudo -s

L4T=/e_nvme/JP60_PROD_NRU220_20240620/Linux_for_Tegra
SYS_IMG_RAW=NRU220_20240704_JP60_PROD

cd $L4T/bootloader
mv /e_nvme/$SYS_IMG_RAW.raw .
./mksparse -v --fillpattern=0 $SYS_IMG_RAW.raw $SYS_IMG_RAW.img
sudo cp $SYS_IMG_RAW.img system.img


cd $L4T
sudo ./flash_JAO32GB_JAO64GB_system_image_reuse.sh