Hi all,

 

I have a Allwinner box (A31s, 1G memory, 8G eMMC).  Armbian worked very well when I booted it from SDCard.  But after I installed Armbian to its eMMC by following the guide, my box could not boot again from either eMMC or SDCard.   I guess "dd if=/dev/zero of=/dev/mmcblk0 bs=1024 seek=8 count=1" killed the box. The TTL shows below error message  

 

================================================================

U-Boot SPL 2017.01-armbian (Feb 02 2017 - 01:58:31)
DRAM: 1024 MiB
Trying to boot from MMC2MMC Device 1 not found
spl: could not find mmc device. error: -19
SPL: failed to boot from all boot devices
### ERROR ### Please RESET the board ###

 

================================================================

 

I also tried to boot it from SDCard or USB. Neither of them could work.  

 

Is there any way that I can de-brick it?  Or, the box is already died.  Thanks.

 

 

 

The command you mentioned above is erasing the first sector of the u-boot. This command is only to make sure that SD Card won't stay bootable for people wishing to boot from eMMC with still the SDcard inserted.

It should not have been executed until you are sure that you eMMC is actually bootable and working properly.

 

And most likely u-boot was compiled without eMMC support in SPL.