I have a question , nx emmc install the system and the ssd install system under jetpack4.6. I do it from modify /boot/extlinux/extlinux.con lang lang ago , How to choice which storage device to start from now

hello 392415830,

Xavier series uses Cboot for bootloader,
you may check [Kernel Boot Sequence Using extlinux.conf] session for default booting scan sequence.

Thank you,

I looked at the link you provided. How can I modify the settings to boot from fixed storage,Or how do I configure this file

You have to create a file called boot/extlinux/extlinux.conf inside emmc partition. CBoot will check for that file and load the kernel and dtb based on the configuration mentioned in the file. This is a sample configuration.

DEFAULT primary

MENU TITLE L4T boot options

LABEL primary
      MENU LABEL primary kernel
      LINUX /boot/Image
      INITRD /boot/initrd
      FDT /boot/dtb/tegra194-p3668-all-p3509-0000.dtb
      APPEND ${cbootargs} root=/dev/mmcblk0p1 rw rootwait rootfstype=ext4 console=ttyTCU0,115200n8 console=tty0 fbcon=map:0 net.ifnames=0

# When testing a custom kernel, it is recommended that you create a backup of
# the original kernel and add a new entry to this file so that the device can
# fallback to the original kernel. To do this:
# 1, Make a backup of the original kernel
#      sudo cp /boot/Image /boot/Image.backup
# 2, Copy your custom kernel into /boot/Image
# 3, Uncomment below menu setting lines for the original kernel
# 4, Reboot

# LABEL backup
#    MENU LABEL backup kernel
#    LINUX /boot/Image.backup
#    INITRD /boot/initrd
#    APPEND ${cbootargs}

I have a general understanding, but I don’t know how to operate it. Figure 1 and Figure 2 are two different storage devices respectively, but figure 3 does not achieve the desired effect

What effect are you looking for? Are you trying to load from nvme or emmc? If you are trying to boot from nvme change DEFAULT to nvme. DEFAULT dictates from where the kernel can be loaded.

I see. Thank you. I forgot to change it “DEFAULT”

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