/boot/boot/ in encrypted root_fs on SSD (Jetpack 5.1.2 Orin Nano )

I have flashed encrypted root for Jetson Orin Nano using Jetpack 5.1.2
During installing some drivers I found out that my device have folder /boot/boot/ and bunch of symbolic links from /boot/ to /boot/boot/

For example, all /boot/*.dtbo files are linked, dtb' and extlinux` folders as well.

Question: is it okay or I should fix something?

System is working, I’m faced to some troubles with installation custom Arducam drivers for IMX477 - try to separate the possible factors of my issues.

I prepared examples on freshly flashed system

/boot dir structure

tree -h /boot
/boot
├── [ 12K]  boot
│   ├── [4.0K]  dtb
│   │   └── [339K]  kernel_tegra234-p3767-0003-p3768-0000-a0.dtb
│   ├── [4.0K]  extlinux
│   │   ├── [1.0K]  extlinux.conf
│   │   └── [ 727]  extlinux.conf.nv-update-extlinux-backup
│   ├── [ 32M]  Image
│   ├── [ 32M]  Image.t19x
│   ├── [4.0K]  Image.t19x.sig
│   ├── [ 13M]  initrd
│   ├── [9.3M]  initrd.t19x
│   ├── [4.0K]  initrd.t19x.sig
│   ├── [430K]  kernel_tegra234-p3701-0005-p3737-0000.dtb
│   ├── [339K]  kernel_tegra234-p3767-0003-p3768-0000-a0.dtb
│   ├── [ 13K]  tegra194-p2822-camera-dual-imx274-overlay.dtbo
│   ├── [3.2K]  tegra194-p2822-camera-e2832-overlay.dtbo
│   ├── [4.3K]  tegra194-p2822-camera-e3326-overlay.dtbo
│   ├── [4.1K]  tegra194-p2822-camera-e3331-overlay.dtbo
│   ├── [ 18K]  tegra194-p2822-camera-e3333-overlay.dtbo
│   ├── [8.1K]  tegra194-p2822-camera-eCAM130A_CUXVR-overlay.dtbo
│   ├── [8.5K]  tegra194-p2822-camera-imx185-overlay.dtbo
│   ├── [6.9K]  tegra194-p2822-camera-imx390-overlay.dtbo
│   ├── [1.1K]  tegra194-p2888-0001-p2822-0000-adafruit-sph0645lm4h.dtbo
│   ├── [1.1K]  tegra194-p2888-0001-p2822-0000-adafruit-uda1334a.dtbo
│   ├── [1.3K]  tegra194-p2888-0001-p2822-0000-csi.dtbo
│   ├── [385K]  tegra194-p2888-0001-p2822-0000.dtb
│   ├── [4.0K]  tegra194-p2888-0001-p2822-0000.dtb.sig
│   ├── [3.9K]  tegra194-p2888-0001-p2822-0000-fe-pi-audio.dtbo
│   ├── [4.5K]  tegra194-p2888-0001-p2822-0000-hdr40.dtbo
│   ├── [1.8K]  tegra194-p2888-0001-p2822-0000-m2ke.dtbo
│   ├── [385K]  tegra194-p2888-0001-p2822-0000-maxn.dtb
│   ├── [4.0K]  tegra194-p2888-0001-p2822-0000-maxn.dtb.sig
│   ├── [1.0K]  tegra194-p2888-0001-p2822-0000-overlay.dtbo
│   ├── [3.1K]  tegra194-p2888-0001-p2822-0000-respeaker-4-mic-array.dtbo
│   ├── [3.1K]  tegra194-p2888-0001-p2822-0000-respeaker-4-mic-lin-array.dtbo
│   ├── [1.0K]  tegra194-p2888-0004-e3900-0000-adafruit-sph0645lm4h.dtbo
│   ├── [1.0K]  tegra194-p2888-0004-e3900-0000-adafruit-uda1334a.dtbo
│   ├── [1.8K]  tegra194-p2888-0004-e3900-0000-csi.dtbo
│   ├── [396K]  tegra194-p2888-0004-e3900-0000.dtb
│   ├── [4.0K]  tegra194-p2888-0004-e3900-0000.dtb.sig
│   ├── [4.8K]  tegra194-p2888-0004-e3900-0000-dual-imx274.dtbo
│   ├── [3.9K]  tegra194-p2888-0004-e3900-0000-fe-pi-audio.dtbo
│   ├── [4.3K]  tegra194-p2888-0004-e3900-0000-hdr40.dtbo
│   ├── [3.0K]  tegra194-p2888-0004-e3900-0000-imx274.dtbo
│   ├── [3.1K]  tegra194-p2888-0004-e3900-0000-respeaker-4-mic-array.dtbo
│   ├── [3.1K]  tegra194-p2888-0004-e3900-0000-respeaker-4-mic-lin-array.dtbo
│   ├── [386K]  tegra194-p2888-0008-p2822-0000.dtb
│   ├── [4.0K]  tegra194-p2888-0008-p2822-0000.dtb.sig
│   ├── [386K]  tegra194-p2888-0008-p2822-0000-maxn.dtb
│   ├── [ 883]  tegra194-p2888-0008-p2822-0000-overlay.dtbo
│   ├── [319K]  tegra194-p3668-0000-p3509-0000.dtb
│   ├── [4.0K]  tegra194-p3668-0000-p3509-0000.dtb.sig
│   ├── [319K]  tegra194-p3668-0001-p3509-0000.dtb
│   ├── [4.0K]  tegra194-p3668-0001-p3509-0000.dtb.sig
│   ├── [1.1K]  tegra194-p3668-all-p3509-0000-adafruit-sph0645lm4h.dtbo
│   ├── [1.1K]  tegra194-p3668-all-p3509-0000-adafruit-uda1334a.dtbo
│   ├── [2.7K]  tegra194-p3668-all-p3509-0000-camera-imx219-dual.dtbo
│   ├── [3.0K]  tegra194-p3668-all-p3509-0000-camera-imx477-dual.dtbo
│   ├── [2.9K]  tegra194-p3668-all-p3509-0000-camera-imx477-imx219.dtbo
│   ├── [319K]  tegra194-p3668-all-p3509-0000.dtb
│   ├── [4.0K]  tegra194-p3668-all-p3509-0000.dtb.sig
│   ├── [3.9K]  tegra194-p3668-all-p3509-0000-fe-pi-audio.dtbo
│   ├── [5.5K]  tegra194-p3668-all-p3509-0000-hdr40.dtbo
│   ├── [2.1K]  tegra194-p3668-all-p3509-0000-m2ke.dtbo
│   ├── [3.1K]  tegra194-p3668-all-p3509-0000-respeaker-4-mic-array.dtbo
│   ├── [3.1K]  tegra194-p3668-all-p3509-0000-respeaker-4-mic-lin-array.dtbo
│   ├── [2.1K]  tegra194-p3668-p3509-overlay.dtbo
│   ├── [337K]  tegra234-p3701-0000-as-p3767-0000-p3737-0000.dtb
│   ├── [337K]  tegra234-p3701-0000-as-p3767-0001-p3737-0000.dtb
│   ├── [337K]  tegra234-p3701-0000-as-p3767-0003-p3737-0000.dtb
│   ├── [337K]  tegra234-p3701-0000-as-p3767-0004-p3737-0000.dtb
│   ├── [430K]  tegra234-p3701-0000-p3737-0000.dtb
│   ├── [430K]  tegra234-p3701-0000-p3737-0000-kexec.dtb
│   ├── [245K]  tegra234-p3701-0002-p3711-0000.dtb
│   ├── [286K]  tegra234-p3701-0002-p3740-0002-b01.dtb
│   ├── [286K]  tegra234-p3701-0002-p3740-0002.dtb
│   ├── [430K]  tegra234-p3701-0004-p3737-0000.dtb
│   ├── [430K]  tegra234-p3701-0005-p3737-0000.dtb
│   ├── [429K]  tegra234-p3701-0008-p3737-0000.dtb
│   ├── [295K]  tegra234-p3701-0008-p3740-0002-c01.dtb
│   ├── [ 830]  tegra234-p3701-overlay.dtbo
│   ├── [1.1K]  tegra234-p3737-0000-p3701-0000-adafruit-sph0645lm4h.dtbo
│   ├── [1.1K]  tegra234-p3737-0000-p3701-0000-adafruit-uda1334a.dtbo
│   ├── [2.0K]  tegra234-p3737-0000-p3701-0000-csi.dtbo
│   ├── [3.9K]  tegra234-p3737-0000-p3701-0000-fe-pi-audio.dtbo
│   ├── [3.9K]  tegra234-p3737-0000-p3701-0000-hdr40.dtbo
│   ├── [1.5K]  tegra234-p3737-0000-p3701-0000-m2ke.dtbo
│   ├── [3.2K]  tegra234-p3737-0000-p3701-0000-respeaker-4-mic-array.dtbo
│   ├── [3.2K]  tegra234-p3737-0000-p3701-0000-respeaker-4-mic-lin-array.dtbo
│   ├── [4.3K]  tegra234-p3737-audio-codec-rt5658-40pin.dtbo
│   ├── [ 10K]  tegra234-p3737-camera-dual-hawk-ar0234-e3653-overlay.dtbo
│   ├── [ 13K]  tegra234-p3737-camera-dual-imx274-overlay.dtbo
│   ├── [4.1K]  tegra234-p3737-camera-e3331-overlay.dtbo
│   ├── [ 18K]  tegra234-p3737-camera-e3333-overlay.dtbo
│   ├── [ 27K]  tegra234-p3737-camera-hawk-owl-overlay.dtbo
│   ├── [8.0K]  tegra234-p3737-camera-imx185-overlay.dtbo
│   ├── [7.0K]  tegra234-p3737-camera-imx390-overlay.dtbo
│   ├── [3.3K]  tegra234-p3737-overlay.dtbo
│   ├── [ 26K]  tegra234-p3740-camera-hawk-owl-overlay.dtbo
│   ├── [3.2K]  tegra234-p3740-camera-p3785-overlay.dtbo
│   ├── [1.3K]  tegra234-p3767-0000-p3509-a02-adafruit-sph0645lm4h.dtbo
│   ├── [1.3K]  tegra234-p3767-0000-p3509-a02-adafruit-uda1334a.dtbo
│   ├── [ 812]  tegra234-p3767-0000-p3509-a02-csi.dtbo
│   ├── [4.1K]  tegra234-p3767-0000-p3509-a02-fe-pi-audio.dtbo
│   ├── [4.0K]  tegra234-p3767-0000-p3509-a02-hdr40.dtbo
│   ├── [1.7K]  tegra234-p3767-0000-p3509-a02-m2ke.dtbo
│   ├── [3.3K]  tegra234-p3767-0000-p3509-a02-respeaker-4-mic-array.dtbo
│   ├── [3.4K]  tegra234-p3767-0000-p3509-a02-respeaker-4-mic-lin-array.dtbo
│   ├── [ 812]  tegra234-p3767-0000-p3768-0000-csi.dtbo
│   ├── [2.8K]  tegra234-p3767-camera-imx219-dual.dtbo
│   ├── [3.0K]  tegra234-p3767-camera-imx477-dual.dtbo
│   ├── [3.0K]  tegra234-p3767-camera-imx477-imx219.dtbo
│   ├── [2.8K]  tegra234-p3767-camera-p3768-imx219-dual.dtbo
│   ├── [3.4K]  tegra234-p3767-camera-p3768-imx477-dual-4lane.dtbo
│   ├── [3.0K]  tegra234-p3767-camera-p3768-imx477-dual.dtbo
│   ├── [3.0K]  tegra234-p3767-camera-p3768-imx477-imx219.dtbo
│   ├── [1.3K]  tegra234-p3767-overlay.dtbo
│   └── [ 910]  tegra234-p3768-overlay.dtbo
├── [  10]  dtb -> ./boot/dtb
├── [  15]  extlinux -> ./boot/extlinux
├── [  29]  extlinux.conf -> ./boot/extlinux/extlinux.conf
├── [  55]  extlinux.conf.nv-update-extlinux-backup -> ./boot/extlinux/extlinux.conf.nv-update-extlinux-backup
├── [  12]  Image -> ./boot/Image
├── [  17]  Image.t19x -> ./boot/Image.t19x
├── [  21]  Image.t19x.sig -> ./boot/Image.t19x.sig
├── [  13]  initrd -> ./boot/initrd
├── [  18]  initrd.t19x -> ./boot/initrd.t19x
├── [  22]  initrd.t19x.sig -> ./boot/initrd.t19x.sig
├── [  48]  kernel_tegra234-p3701-0005-p3737-0000.dtb -> ./boot/kernel_tegra234-p3701-0005-p3737-0000.dtb
├── [  55]  kernel_tegra234-p3767-0003-p3768-0000-a0.dtb -> ./boot/dtb/kernel_tegra234-p3767-0003-p3768-0000-a0.dtb
├── [ 16K]  lost+found [error opening dir]
├── [  53]  tegra194-p2822-camera-dual-imx274-overlay.dtbo -> ./boot/tegra194-p2822-camera-dual-imx274-overlay.dtbo
├── [  47]  tegra194-p2822-camera-e2832-overlay.dtbo -> ./boot/tegra194-p2822-camera-e2832-overlay.dtbo
├── [  47]  tegra194-p2822-camera-e3326-overlay.dtbo -> ./boot/tegra194-p2822-camera-e3326-overlay.dtbo
├── [  47]  tegra194-p2822-camera-e3331-overlay.dtbo -> ./boot/tegra194-p2822-camera-e3331-overlay.dtbo
├── [  47]  tegra194-p2822-camera-e3333-overlay.dtbo -> ./boot/tegra194-p2822-camera-e3333-overlay.dtbo
├── [  56]  tegra194-p2822-camera-eCAM130A_CUXVR-overlay.dtbo -> ./boot/tegra194-p2822-camera-eCAM130A_CUXVR-overlay.dtbo
├── [  48]  tegra194-p2822-camera-imx185-overlay.dtbo -> ./boot/tegra194-p2822-camera-imx185-overlay.dtbo
├── [  48]  tegra194-p2822-camera-imx390-overlay.dtbo -> ./boot/tegra194-p2822-camera-imx390-overlay.dtbo
├── [  63]  tegra194-p2888-0001-p2822-0000-adafruit-sph0645lm4h.dtbo -> ./boot/tegra194-p2888-0001-p2822-0000-adafruit-sph0645lm4h.dtbo
├── [  60]  tegra194-p2888-0001-p2822-0000-adafruit-uda1334a.dtbo -> ./boot/tegra194-p2888-0001-p2822-0000-adafruit-uda1334a.dtbo
├── [  46]  tegra194-p2888-0001-p2822-0000-csi.dtbo -> ./boot/tegra194-p2888-0001-p2822-0000-csi.dtbo
├── [  41]  tegra194-p2888-0001-p2822-0000.dtb -> ./boot/tegra194-p2888-0001-p2822-0000.dtb
├── [  45]  tegra194-p2888-0001-p2822-0000.dtb.sig -> ./boot/tegra194-p2888-0001-p2822-0000.dtb.sig
├── [  54]  tegra194-p2888-0001-p2822-0000-fe-pi-audio.dtbo -> ./boot/tegra194-p2888-0001-p2822-0000-fe-pi-audio.dtbo
├── [  48]  tegra194-p2888-0001-p2822-0000-hdr40.dtbo -> ./boot/tegra194-p2888-0001-p2822-0000-hdr40.dtbo
├── [  47]  tegra194-p2888-0001-p2822-0000-m2ke.dtbo -> ./boot/tegra194-p2888-0001-p2822-0000-m2ke.dtbo
├── [  46]  tegra194-p2888-0001-p2822-0000-maxn.dtb -> ./boot/tegra194-p2888-0001-p2822-0000-maxn.dtb
├── [  50]  tegra194-p2888-0001-p2822-0000-maxn.dtb.sig -> ./boot/tegra194-p2888-0001-p2822-0000-maxn.dtb.sig
├── [  50]  tegra194-p2888-0001-p2822-0000-overlay.dtbo -> ./boot/tegra194-p2888-0001-p2822-0000-overlay.dtbo
├── [  64]  tegra194-p2888-0001-p2822-0000-respeaker-4-mic-array.dtbo -> ./boot/tegra194-p2888-0001-p2822-0000-respeaker-4-mic-array.dtbo
├── [  68]  tegra194-p2888-0001-p2822-0000-respeaker-4-mic-lin-array.dtbo -> ./boot/tegra194-p2888-0001-p2822-0000-respeaker-4-mic-lin-array.dtbo
├── [  63]  tegra194-p2888-0004-e3900-0000-adafruit-sph0645lm4h.dtbo -> ./boot/tegra194-p2888-0004-e3900-0000-adafruit-sph0645lm4h.dtbo
├── [  60]  tegra194-p2888-0004-e3900-0000-adafruit-uda1334a.dtbo -> ./boot/tegra194-p2888-0004-e3900-0000-adafruit-uda1334a.dtbo
├── [  46]  tegra194-p2888-0004-e3900-0000-csi.dtbo -> ./boot/tegra194-p2888-0004-e3900-0000-csi.dtbo
├── [  41]  tegra194-p2888-0004-e3900-0000.dtb -> ./boot/tegra194-p2888-0004-e3900-0000.dtb
├── [  45]  tegra194-p2888-0004-e3900-0000.dtb.sig -> ./boot/tegra194-p2888-0004-e3900-0000.dtb.sig
├── [  54]  tegra194-p2888-0004-e3900-0000-dual-imx274.dtbo -> ./boot/tegra194-p2888-0004-e3900-0000-dual-imx274.dtbo
├── [  54]  tegra194-p2888-0004-e3900-0000-fe-pi-audio.dtbo -> ./boot/tegra194-p2888-0004-e3900-0000-fe-pi-audio.dtbo
├── [  48]  tegra194-p2888-0004-e3900-0000-hdr40.dtbo -> ./boot/tegra194-p2888-0004-e3900-0000-hdr40.dtbo
├── [  49]  tegra194-p2888-0004-e3900-0000-imx274.dtbo -> ./boot/tegra194-p2888-0004-e3900-0000-imx274.dtbo
├── [  64]  tegra194-p2888-0004-e3900-0000-respeaker-4-mic-array.dtbo -> ./boot/tegra194-p2888-0004-e3900-0000-respeaker-4-mic-array.dtbo
├── [  68]  tegra194-p2888-0004-e3900-0000-respeaker-4-mic-lin-array.dtbo -> ./boot/tegra194-p2888-0004-e3900-0000-respeaker-4-mic-lin-array.dtbo
├── [  41]  tegra194-p2888-0008-p2822-0000.dtb -> ./boot/tegra194-p2888-0008-p2822-0000.dtb
├── [  45]  tegra194-p2888-0008-p2822-0000.dtb.sig -> ./boot/tegra194-p2888-0008-p2822-0000.dtb.sig
├── [  46]  tegra194-p2888-0008-p2822-0000-maxn.dtb -> ./boot/tegra194-p2888-0008-p2822-0000-maxn.dtb
├── [  50]  tegra194-p2888-0008-p2822-0000-overlay.dtbo -> ./boot/tegra194-p2888-0008-p2822-0000-overlay.dtbo
├── [  41]  tegra194-p3668-0000-p3509-0000.dtb -> ./boot/tegra194-p3668-0000-p3509-0000.dtb
├── [  45]  tegra194-p3668-0000-p3509-0000.dtb.sig -> ./boot/tegra194-p3668-0000-p3509-0000.dtb.sig
├── [  41]  tegra194-p3668-0001-p3509-0000.dtb -> ./boot/tegra194-p3668-0001-p3509-0000.dtb
├── [  45]  tegra194-p3668-0001-p3509-0000.dtb.sig -> ./boot/tegra194-p3668-0001-p3509-0000.dtb.sig
├── [  62]  tegra194-p3668-all-p3509-0000-adafruit-sph0645lm4h.dtbo -> ./boot/tegra194-p3668-all-p3509-0000-adafruit-sph0645lm4h.dtbo
├── [  59]  tegra194-p3668-all-p3509-0000-adafruit-uda1334a.dtbo -> ./boot/tegra194-p3668-all-p3509-0000-adafruit-uda1334a.dtbo
├── [  60]  tegra194-p3668-all-p3509-0000-camera-imx219-dual.dtbo -> ./boot/tegra194-p3668-all-p3509-0000-camera-imx219-dual.dtbo
├── [  60]  tegra194-p3668-all-p3509-0000-camera-imx477-dual.dtbo -> ./boot/tegra194-p3668-all-p3509-0000-camera-imx477-dual.dtbo
├── [  62]  tegra194-p3668-all-p3509-0000-camera-imx477-imx219.dtbo -> ./boot/tegra194-p3668-all-p3509-0000-camera-imx477-imx219.dtbo
├── [  40]  tegra194-p3668-all-p3509-0000.dtb -> ./boot/tegra194-p3668-all-p3509-0000.dtb
├── [  44]  tegra194-p3668-all-p3509-0000.dtb.sig -> ./boot/tegra194-p3668-all-p3509-0000.dtb.sig
├── [  53]  tegra194-p3668-all-p3509-0000-fe-pi-audio.dtbo -> ./boot/tegra194-p3668-all-p3509-0000-fe-pi-audio.dtbo
├── [  47]  tegra194-p3668-all-p3509-0000-hdr40.dtbo -> ./boot/tegra194-p3668-all-p3509-0000-hdr40.dtbo
├── [  46]  tegra194-p3668-all-p3509-0000-m2ke.dtbo -> ./boot/tegra194-p3668-all-p3509-0000-m2ke.dtbo
├── [  63]  tegra194-p3668-all-p3509-0000-respeaker-4-mic-array.dtbo -> ./boot/tegra194-p3668-all-p3509-0000-respeaker-4-mic-array.dtbo
├── [  67]  tegra194-p3668-all-p3509-0000-respeaker-4-mic-lin-array.dtbo -> ./boot/tegra194-p3668-all-p3509-0000-respeaker-4-mic-lin-array.dtbo
├── [  40]  tegra194-p3668-p3509-overlay.dtbo -> ./boot/tegra194-p3668-p3509-overlay.dtbo
├── [  55]  tegra234-p3701-0000-as-p3767-0000-p3737-0000.dtb -> ./boot/tegra234-p3701-0000-as-p3767-0000-p3737-0000.dtb
├── [  55]  tegra234-p3701-0000-as-p3767-0001-p3737-0000.dtb -> ./boot/tegra234-p3701-0000-as-p3767-0001-p3737-0000.dtb
├── [  55]  tegra234-p3701-0000-as-p3767-0003-p3737-0000.dtb -> ./boot/tegra234-p3701-0000-as-p3767-0003-p3737-0000.dtb
├── [  55]  tegra234-p3701-0000-as-p3767-0004-p3737-0000.dtb -> ./boot/tegra234-p3701-0000-as-p3767-0004-p3737-0000.dtb
├── [  41]  tegra234-p3701-0000-p3737-0000.dtb -> ./boot/tegra234-p3701-0000-p3737-0000.dtb
├── [  47]  tegra234-p3701-0000-p3737-0000-kexec.dtb -> ./boot/tegra234-p3701-0000-p3737-0000-kexec.dtb
├── [  41]  tegra234-p3701-0002-p3711-0000.dtb -> ./boot/tegra234-p3701-0002-p3711-0000.dtb
├── [  45]  tegra234-p3701-0002-p3740-0002-b01.dtb -> ./boot/tegra234-p3701-0002-p3740-0002-b01.dtb
├── [  41]  tegra234-p3701-0002-p3740-0002.dtb -> ./boot/tegra234-p3701-0002-p3740-0002.dtb
├── [  41]  tegra234-p3701-0004-p3737-0000.dtb -> ./boot/tegra234-p3701-0004-p3737-0000.dtb
├── [  41]  tegra234-p3701-0005-p3737-0000.dtb -> ./boot/tegra234-p3701-0005-p3737-0000.dtb
├── [  41]  tegra234-p3701-0008-p3737-0000.dtb -> ./boot/tegra234-p3701-0008-p3737-0000.dtb
├── [  45]  tegra234-p3701-0008-p3740-0002-c01.dtb -> ./boot/tegra234-p3701-0008-p3740-0002-c01.dtb
├── [  34]  tegra234-p3701-overlay.dtbo -> ./boot/tegra234-p3701-overlay.dtbo
├── [  63]  tegra234-p3737-0000-p3701-0000-adafruit-sph0645lm4h.dtbo -> ./boot/tegra234-p3737-0000-p3701-0000-adafruit-sph0645lm4h.dtbo
├── [  60]  tegra234-p3737-0000-p3701-0000-adafruit-uda1334a.dtbo -> ./boot/tegra234-p3737-0000-p3701-0000-adafruit-uda1334a.dtbo
├── [  46]  tegra234-p3737-0000-p3701-0000-csi.dtbo -> ./boot/tegra234-p3737-0000-p3701-0000-csi.dtbo
├── [  54]  tegra234-p3737-0000-p3701-0000-fe-pi-audio.dtbo -> ./boot/tegra234-p3737-0000-p3701-0000-fe-pi-audio.dtbo
├── [  48]  tegra234-p3737-0000-p3701-0000-hdr40.dtbo -> ./boot/tegra234-p3737-0000-p3701-0000-hdr40.dtbo
├── [  47]  tegra234-p3737-0000-p3701-0000-m2ke.dtbo -> ./boot/tegra234-p3737-0000-p3701-0000-m2ke.dtbo
├── [  64]  tegra234-p3737-0000-p3701-0000-respeaker-4-mic-array.dtbo -> ./boot/tegra234-p3737-0000-p3701-0000-respeaker-4-mic-array.dtbo
├── [  68]  tegra234-p3737-0000-p3701-0000-respeaker-4-mic-lin-array.dtbo -> ./boot/tegra234-p3737-0000-p3701-0000-respeaker-4-mic-lin-array.dtbo
├── [  51]  tegra234-p3737-audio-codec-rt5658-40pin.dtbo -> ./boot/tegra234-p3737-audio-codec-rt5658-40pin.dtbo
├── [  64]  tegra234-p3737-camera-dual-hawk-ar0234-e3653-overlay.dtbo -> ./boot/tegra234-p3737-camera-dual-hawk-ar0234-e3653-overlay.dtbo
├── [  53]  tegra234-p3737-camera-dual-imx274-overlay.dtbo -> ./boot/tegra234-p3737-camera-dual-imx274-overlay.dtbo
├── [  47]  tegra234-p3737-camera-e3331-overlay.dtbo -> ./boot/tegra234-p3737-camera-e3331-overlay.dtbo
├── [  47]  tegra234-p3737-camera-e3333-overlay.dtbo -> ./boot/tegra234-p3737-camera-e3333-overlay.dtbo
├── [  50]  tegra234-p3737-camera-hawk-owl-overlay.dtbo -> ./boot/tegra234-p3737-camera-hawk-owl-overlay.dtbo
├── [  48]  tegra234-p3737-camera-imx185-overlay.dtbo -> ./boot/tegra234-p3737-camera-imx185-overlay.dtbo
├── [  48]  tegra234-p3737-camera-imx390-overlay.dtbo -> ./boot/tegra234-p3737-camera-imx390-overlay.dtbo
├── [  34]  tegra234-p3737-overlay.dtbo -> ./boot/tegra234-p3737-overlay.dtbo
├── [  50]  tegra234-p3740-camera-hawk-owl-overlay.dtbo -> ./boot/tegra234-p3740-camera-hawk-owl-overlay.dtbo
├── [  47]  tegra234-p3740-camera-p3785-overlay.dtbo -> ./boot/tegra234-p3740-camera-p3785-overlay.dtbo
├── [  62]  tegra234-p3767-0000-p3509-a02-adafruit-sph0645lm4h.dtbo -> ./boot/tegra234-p3767-0000-p3509-a02-adafruit-sph0645lm4h.dtbo
├── [  59]  tegra234-p3767-0000-p3509-a02-adafruit-uda1334a.dtbo -> ./boot/tegra234-p3767-0000-p3509-a02-adafruit-uda1334a.dtbo
├── [  45]  tegra234-p3767-0000-p3509-a02-csi.dtbo -> ./boot/tegra234-p3767-0000-p3509-a02-csi.dtbo
├── [  53]  tegra234-p3767-0000-p3509-a02-fe-pi-audio.dtbo -> ./boot/tegra234-p3767-0000-p3509-a02-fe-pi-audio.dtbo
├── [  47]  tegra234-p3767-0000-p3509-a02-hdr40.dtbo -> ./boot/tegra234-p3767-0000-p3509-a02-hdr40.dtbo
├── [  46]  tegra234-p3767-0000-p3509-a02-m2ke.dtbo -> ./boot/tegra234-p3767-0000-p3509-a02-m2ke.dtbo
├── [  63]  tegra234-p3767-0000-p3509-a02-respeaker-4-mic-array.dtbo -> ./boot/tegra234-p3767-0000-p3509-a02-respeaker-4-mic-array.dtbo
├── [  67]  tegra234-p3767-0000-p3509-a02-respeaker-4-mic-lin-array.dtbo -> ./boot/tegra234-p3767-0000-p3509-a02-respeaker-4-mic-lin-array.dtbo
├── [  46]  tegra234-p3767-0000-p3768-0000-csi.dtbo -> ./boot/tegra234-p3767-0000-p3768-0000-csi.dtbo
├── [  45]  tegra234-p3767-camera-imx219-dual.dtbo -> ./boot/tegra234-p3767-camera-imx219-dual.dtbo
├── [  45]  tegra234-p3767-camera-imx477-dual.dtbo -> ./boot/tegra234-p3767-camera-imx477-dual.dtbo
├── [  47]  tegra234-p3767-camera-imx477-imx219.dtbo -> ./boot/tegra234-p3767-camera-imx477-imx219.dtbo
├── [  51]  tegra234-p3767-camera-p3768-imx219-dual.dtbo -> ./boot/tegra234-p3767-camera-p3768-imx219-dual.dtbo
├── [  57]  tegra234-p3767-camera-p3768-imx477-dual-4lane.dtbo -> ./boot/tegra234-p3767-camera-p3768-imx477-dual-4lane.dtbo
├── [  51]  tegra234-p3767-camera-p3768-imx477-dual.dtbo -> ./boot/tegra234-p3767-camera-p3768-imx477-dual.dtbo
├── [  53]  tegra234-p3767-camera-p3768-imx477-imx219.dtbo -> ./boot/tegra234-p3767-camera-p3768-imx477-imx219.dtbo
├── [  34]  tegra234-p3767-overlay.dtbo -> ./boot/tegra234-p3767-overlay.dtbo
└── [  34]  tegra234-p3768-overlay.dtbo -> ./boot/tegra234-p3768-overlay.dtbo

Partition structure

lsblk -o NAME,SIZE,FSTYPE,MOUNTPOINT,PARTLABEL

NAME             SIZE FSTYPE      MOUNTPOINT     PARTLABEL
loop1             16M vfat                       
zram0          622.6M             [SWAP]         
zram1          622.6M             [SWAP]         
zram2          622.6M             [SWAP]         
zram3          622.6M             [SWAP]         
zram4          622.6M             [SWAP]         
zram5          622.6M             [SWAP]         
nvme0n1        223.6G                            
├─nvme0n1p1      400M ext4        /boot          APP
├─nvme0n1p2    220.6G crypto_LUKS                APP_ENC
│ └─crypt_root 220.6G ext4        /              
├─nvme0n1p3      128M                            A_kernel
├─nvme0n1p4      768K                            A_kernel-dtb
├─nvme0n1p5     31.6M                            A_reserved_on_user
├─nvme0n1p6      128M                            B_kernel
├─nvme0n1p7      768K                            B_kernel-dtb
├─nvme0n1p8     31.6M                            B_reserved_on_user
├─nvme0n1p9       80M                            recovery
├─nvme0n1p10     512K                            recovery-dtb
├─nvme0n1p11      64M vfat                       esp
├─nvme0n1p12      80M                            recovery_alt
├─nvme0n1p13     512K                            recovery-dtb_alt
├─nvme0n1p14      64M                            esp_alt
├─nvme0n1p15     400M crypto_LUKS                UDA
│ └─crypt_UDA    384M ext4        /mnt/crypt_UDA 
└─nvme0n1p16   479.5M                            reserved

Filesystem

df -h
Filesystem              Size  Used Avail Use% Mounted on
/dev/mapper/crypt_root  217G  6.8G  199G   4% /
/dev/mapper/crypt_UDA   374M   14K  350M   1% /mnt/crypt_UDA
none                    3.6G     0  3.6G   0% /dev
tmpfs                   3.7G     0  3.7G   0% /dev/shm
tmpfs                   748M   19M  729M   3% /run
tmpfs                   5.0M  4.0K  5.0M   1% /run/lock
tmpfs                   3.7G     0  3.7G   0% /sys/fs/cgroup
/dev/nvme0n1p1          371M  182M  162M  53% /boot
tmpfs                   748M  4.0K  748M   1% /run/user/1000

Config actual:
extlinux.conf (1.0 KB)

Config backup during installation:
extlinux.conf.nv-update-extlinux-backup (727 Bytes)

Hi isapient,

Are you using the devkit or custom board for Orin Nano?

I don’t have /boot/boot on the devkit as yours.
Do you modify anything or you are using custom BSP package?

Please confirm if the node in device tree has been enabled and if there’s any message in dmeg

Thank you @KevinFFF for your prompt reply.

boot/boot/dir is on production board with encrypted root_fs;
I’m flashing devkit at the moment to check the differences.

My modifications were focused only to enabling LUKS encrypted partition:

At the moment, I just want to understand if it is typical to have boot\boot structure for APP_ENC mounted to root anb APP mounted to /boot

Custom IMX477 drivers are separate complicated topic, Arducam deb package trying to mount /mnt/APP because detected that not APP mounted as root (some automation for NFS case) It seems wrong operation for my case and we are trying to prevent it with @naxty

Flashed devkit by encrypted root_fs: /boot/boot is presented there exactly as on the production module. Devkit flashed with not encrypted root has single /boot

Collected as much as possible data about my encrypted disk system
disk_report.txt (31.1 KB)

The same disk info for non-encrypted root_fs on the production board
nonencrypted_disk_report.txt (27.1 KB)

And this is properly installed arducam driver config
extlinux.conf.txt (1.4 KB)