Have you tried the lsscsi and lsblk commands to see what the system thinks
that device is?


On Sun, May 16, 2021, 12:49 PM John Dammeyer <[email protected]> wrote:

> If it's like the Beaglebone Black, when you apply power,  you have to
> hold the boot button down for quite a while.    That's what tells the
> system to boot from the sd card.
>
>
>
> It won't matter if you form the card as Balena etcher will write the
> image in the format required for the Beagle.
>
> John
>
>
>
>
>
> *From:* [email protected] [mailto:[email protected]]
> *On Behalf Of *Shrikumar Sharma
> *Sent:* May-16-21 4:52 AM
> *To:* BeagleBoard
> *Subject:* [beagleboard] Unable to boot from SD card or mount a blank one
>
>
>
> Hi
>
>
>
> I am new to the BB AI. I have been facing some issues with the SD-card
> boot.
>
> The board boots just fine off of the eMMC. However,  I would like to boot
> it from the SD card.
>
> I have used a number of images from the BB images page, written them into
> the SD card with Balena etcher, no use - the board always boots off of the
> eMMC.
>
>
>
> I then tried formatting the card with FAT32 , allocation unit size 4096,
> and then checked if I could at least mount it from the eMMC booted system.
> The SD card is never recognized and there is no entry in /dev for this
> device.
>
>
>
> I tried using dtc on the am5729-beagleboardai.dtb to generate the dts,
> followed the post at:
>
>
> https://www.element14.com/community/thread/74281/l/beaglebone-ai-booting-from-sd-card-issue
>
>
>
> specifically, I did this:
>
> "*converted the am5729-beagleboneai.dtb to xx.dts using "dtc". Then, I
> found out mmc1 node (mmc@4809c000), and modify some places as follows:*
>
> *1. compatible = "ti,dra7-sdhci";   >>>>>      compatible =
> "ti,dra7-sdhci", "ti,omap4-hsmmc";*
>
> *2. add: vmmc_aux-supply = <0xd0>; (same node with vqmmc-supply)*
>
> *3. max-frequency = <0xb71b000>;     >>>>>      max-frequency =
> <0x16e3600>; (to lower the frequency of mmc)*
>
>
>
> *Save and exit, then convert the .dts file to am5729-beagleboneai.dtb,
> replace the old one.*
>
>  "
>
> (copied the steps from the above site)
>
>
>
> This does not work either.
>
>
>
> I dont have a serial interface for the board just yet so I dont have the
> serial output.
>
>
>
> I would appreciate any input or help. I am not sure what I should do to
> get this board booting off of the SD card.
>
>
>
> Thank you and Best regards!
>
>
>
> --
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