How to Boot from NVMe SSD?

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
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50

Hi, @jocover
Sorry for the late answer.

  1. Update, mentioned in my previous post ( 4.4 DP), reflashed CBO partition with default root device path root=/dev/mmcblk0p1 . In this case boot folder copy couldn’t help. I don’t know, was it my local error or previous update feature :)

  2. According current update to JetPack 4.4 - L4T R32.4.3 production release:
    In autoupdate window I have choosen “Reboot later” and have manually copied boot folder to eMMC. Xavier have rebooted succesfully and even with customized kernel, that I have used.
    Interesting features:
    This update regenerated extlinux.conf file ( /boot/extlinux/extlinux.conf on SSD). It succesfully parsed my manually edited config (was: extlinux.conf.bak.log (883 Bytes) , now: extlinux.conf.log (1.2 KB) )
    root= parameter was added to APPEND:
    Before update:

LABEL primary
MENU LABEL primary kernel
LINUX /boot/Image-exp2
INITRD /boot/initrd.img-4.9.140-tegra
APPEND ${cbootargs} quiet

After update:

LABEL primary
MENU LABEL primary kernel
LINUX /boot/Image-exp2
INITRD /boot/initrd.img-4.9.140-tegra
APPEND ${cbootargs} quiet root=PARTUUID=84bce66b-f20c-49f0-a6dd-d2d402a01189 rw rootwait rootfstype=ext4 console=ttyTCU0,115200n8 console=tty0 fbcon=map:0 net.ifnames=0 rootfstype=ext4

Kernel command line from dmesg:

[ 0.000000] Kernel command line: console=ttyTCU0,115200 video=tegrafb no_console_suspend=1 earlycon=tegra_comb_uart,mmio32,0x0c168000 gpt tegra_fbmem=0x800000@0xa069c000 lut_mem=0x2008@0xa0697000 usbcore.old_scheme_first=1 tegraid=19.1.2.0.0 maxcpus=8 boot.slot_suffix=_b boot.ratchetvalues=0.4.2 vpr_resize sdhci_tegra.en_boot_part_access=1 quiet root=PARTUUID=84bce66b-f20c-49f0-a6dd-d2d402a01189 rw rootwait rootfstype=ext4 console=ttyTCU0,115200n8 console=tty0 fbcon=map:0 net.ifnames=0 rootfstype=ext4

So, in [JetPack 4.4 - L4T R32.4.3 production release] root device path from CBO partition is not used. I think it’s related to Issue 2926568 from 32.4.3 Release Notes . Problem with init script in initrd has been solved by NVIDIA by removing source of first root= parameter :). Update switched system from your method to boot from SSD to APPEND method.

Your method should be tested on latest JetPack. external option could be unsupported now.