Boot from sd

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  • Here's tutorial to copy the root file system to SD card, and booting from the SD card.
  • If the root file system will be on an SD card, execute the below script to flash the device - mentioned at Jetson TX1 and TX2 developer kits user guide
sudo ./ <platform name> mmcblk1p1         

Pick a device to place your rootfs

  • Use these procedures to copy the file system to the Tegra device.
  1. If you are using the internal EMMC, skip ahead to Flashing the Bootloader and Kernel.
  2. If you prefer to use an external storage device for the root filesystem, use the following procedure to copy the file system to an external storage device.
  • Plug your rootfs device into the host system, If your device is not formatted as Ext4, enter the following command to format it with an Ext4 file system:
$ sudo mkfs.ext4 /dev/sd<port><device_number>
<port> is the port to which your device is mounted.
<device_number> is the device number of the device attached to the port. You can use the dmesg command to determine the port.
  • If needed, mount your device with the following command:
sudo mount /dev/sdX1 <mntpoint>
Where <mntpoint> is the mount point on the host system for your rootfs device.
  • Copy the file system. If LDK_ROOTFS_DIR is set, execute these commands:
$ sudo cp -a * <mntpoint> && sync
  • If it is not set, copy the rootfs directory that is included in the release by executing the following commands:
$ cd <your_L4T_root>/Linux_for_Tegra/rootfs
$ sudo cp -a * <mntpoint> && sync
  • After copying the content to the external disk or device, unmount the disk and connect it to the target Tegra device.
    unplug SD card and plug-in SD card in TX2
    modify exlinux.conf in sdcard and boot up the device
change /dev/mmcblk0p1 to /dev/mmcblk1p1 (/boot/extlinux/extlinux.conf)
  • Device is booting using /dev/mmcblk1p1