Disable boot of SD Card

[Jeremy Simon]

Hi all,

I have a BBB and have flashed the latest Debian image. By default it will still boot off the SD card if it is inserted and has a valid boot image on it. I want to disable this behaviour so that it always boots off the eMMC flash.
I understand that I have to modify the uEnv.txt settings to achieve this but can anyone give me some help on what settings I need to change?

Thanks

[Robert Nelson]

insert/mount microSD:

sudo rm ./uEnv.txt
sudo rm ./boot.scr
sudo rm ./boot/boot.scr
sudo rm ./boot/uEnv.txt

All documented here:

http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0

Regards,

--
Robert Nelson
https://rcn-ee.com/

[Jeremy Simon]

Thanks Robert.
Yes that will work but I also want it to boot from the eMMC flash even if the SD card is inserted and there is a valid boot partition on it.
Cheers,
Jeremy

[Robert Nelson]

Then un-patch u-boot...

[William Hermans]

Thanks Robert.
Yes that will work but I also want it to boot from the eMMC flash even if the SD card is inserted and there is a valid boot partition on it.

Cheers,
Jeremy

Jeremy, What are your concerns here ? If you're just worried about the boot flag being set . . .

sudo fdisk /dev/sdx <--- make sure you get the path to the sdcard correct.

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[Jeremy Simon]

Hi William,

No concens. Just want to have bootable image on the SDCard but boot from eMMC by default. Then press boot button to boot from SD Card.

Cheers,
Jeremy

[Grzesiek Stawik]

Hi, have you ever solved this problem ? Because i'm facing this exact issue myself, and i'd love to know if there is a known solution.

Best Regards, Greg.

[Robert Nelson]

HI Greg,

On Sat, Jun 11, 2016 at 10:54 PM, Grzesiek Stawik <sta...@gmail.com> wrote:
> Hi, have you ever solved this problem ? Because i'm facing this exact issue
> myself, and i'd love to know if there is a known solution.
>
> Best Regards, Greg.

See this thread:

https://groups.google.com/forum/#!topic/beagleboard/nIZzqm46ilI

[Grzesiek Stawik]

Thank You !

Pozdrawiam, Grzegorz Stawik.

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