UEFI cannot boot from USB drive first

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin Nano
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1

Hi Everyone,
When I use the following command to burn UEFI, I find that I cannot boot from the USB drive as the first priority.
ROOTFS_AB=1 ROOTFS_RETRY_COUNT_MAX=1 ./flash.sh --no-systemimg -c bootloader/generic/cfg/flash_t234_qspi.xml jetson-orin-nano-devkit nvme0n1p1
But when I remove ROOTFS_AB=1 ROOTFS_RETRY_COUNT_MAX=1, I can boot from the USB drive first.
So if I want to enable the AB partition and also want to set the image to boot from the USB drive first, how can I do this?

3

Hi,

What do you mean about boot from the USB drive?

Do you mean use USB drive as a rootfs?

Thanks

4

Yes, you are right. my USB（/dev/sda） partition table is as follows:

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048          133119   64.0 MiB    EF00  esp
   2          133120        59725790   28.4 GiB    0700  APP

My SSD（/dev/nvme0n1） partition table looks like this:

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048          133119   64.0 MiB    EF00  esp
   2          133120         8521727   4.0 GiB     8300  APP
   3        10094592        18483199   4.0 GiB     8300  APP_b

But if I enable ROOTFS_AB=1 ROOTFS_RETRY_COUNT_MAX=1, I can not get the USB drive as my first boot device, it will automatic boot from SSD at first.

5

Also.
Some question to confirm:

  • Are you using a Jetson Nano or Jetson Orin Nano?
  • What is your JP version?

Seems like you are using UEFI, which not support Jetson Nano

Thanks

6

Hi,

Please refer to doc to override the default order.

Thanks

7

The answers to the questions are as follows:

  1. We have two types of Jetson, one is nano4g, the other is nx8g, But I am testing nano4g
  2. I use the Jetson Linux 36.4.3

After I burned UEFI, the UEFI settings page looked like this:

image
image706×342 37 KB

8

I added ADDITIONAL_DTB_OVERLAY="BootOrderUsb.dtbo" in the command to execute flash.sh, and then I can boot from the USB drive first. Thank you for your answer.

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10

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11

Hi,

Could you describe more in detail?
How do you enter in SSD system?
In general, add OVERLAY will take effect unless you manually modify in bios setting.

Thanks

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