The eMMC is definitely borked. I tried several times to get the eMMC to do
anything with it.
mmc gives the following result
mmc extcsd read /dev/mmcblk1 | grep "Life" | awk '{print $6,$7}'
[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]: 0x0b
[EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]: 0x08
As far as I understood, 0x01 means dead cell is between 0 and 10 percent.
In that understanding 0x0b means that between 100 and 110 percent is dead,
and 0x08 means between 70 and 80 percent is dead.
Thanks for bootloadertip, I did
sudo dd if=/dev/zero of=/dev/mmcblk1 bs=1M count=1
After that the machine booted off the sdcard without having to press the
boot button, as the Beaglebone could not find a bootloader on the eMMC.
On Tuesday, November 26, 2019 at 2:54:25 PM UTC+1, Graham Haddock wrote:
>
> It might not be an eMMC failure.
> Could just be an old bootloader.
> Did you update the bootpoader in the eMMC?
>
>
> https://elinux.org/EBC_Exercise_07_Updating_an_Old_U-Boot#Fixing_the_Problem.2C_Blow_Away_Old_Boot_Loader
>
> --- Graham
>
> ==
>
> On Monday, November 25, 2019 at 11:38:32 PM UTC-6, Jim F wrote:
>>
>> Should be easy to do. Change the boot configuration so that you don't try
>> to boot from mmc1.
>>
>> I think if it's a black, it should be r68 out, r93 in. Look up that
>> platform manual to see the boot options. Chip is Am3358.
>>
>> Here a handy chunk of schematic to help with that.
>> https://e2e.ti.com/support/processors/f/791/t/661109?AM3358-SYSBOOT-configuration
>>
>> J
>>
>> On Mon, Nov 25, 2019, 10:16 PM Johan Henselmans <[email protected]>
>> wrote:
>>
>>>
>>> I have a BeagleBone Wireless with a damaged eMMC card.
>>>
>>> I got mmcutils from
>>> https://git.kernel.org/pub/scm/linux/kernel/git/cjb/mmc-utils.git, and
>>> mmc extcsd read /dev/mmcblk1
>>> gives me this for the lifetime estimation:
>>> eMMC Life Time Estimation A [EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_A]: 0x0b
>>> eMMC Life Time Estimation B [EXT_CSD_DEVICE_LIFE_TIME_EST_TYP_B]: 0x08
>>> Not good, should be something like 0x01 (less that 10 percent),
>>> according to
>>>
>>> https://www.cnx-software.com/2019/08/16/wear-estimation-emmc-flash-memory/
>>>
>>> Also, looking at the devices I do not see a mmcbl1p1.
>>> root@beaglebone:~# lsblk
>>> NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
>>> mmcblk0 179:0 0 14.9G 0 disk
>>> └─mmcblk0p1 179:1 0 3.5G 0 part /
>>> mmcblk1 179:8 0 3.6G 0 disk
>>> mmcblk1boot0 179:16 0 2M 1 disk
>>> mmcblk1boot1 179:24 0 2M 1 disk
>>> mmcblk1rpmb 179:32 0 512K 0 disk
>>>
>>> I am trying to boot the beaglebone from SD-card for the moment, until i
>>> get another one, but it will only boot when i use press the power and the
>>> boot button next to the sd-card.
>>>
>>> I tried to get rid of the boot flag on /dev/mmcblk1, as per instructions
>>> on
>>> https://www.erdahl.io/2016/12/beaglebone-black-booting-from-sd-by.html
>>> but I get errors getting to the eMMC:
>>> fdisk: cannot open /dev/mmcblk1: Input/output error
>>>
>>> Is there any way I can disable the eMMC somehow, so that it does not
>>> interfere with the booting of the sd-card and automatically boots the
>>> sd-card?
>>>
>>> Kind Regards,
>>> Johan Henselmans
>>>
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>>>
>>
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