I'm trying to write Debian 7.5 (2014-05-14) onto a BeagleBoneBlack 
Industrial from Element14, but following the instructions at 
http://elinux.org/Beagleboard:BeagleBoneBlack_Debian#Flashing_eMMC didn't 
work. It doesn't flash the image at reboot (at least, there is no LED 
flashing pattern).

Here is no init-eMMC-flasher-v3.sh file in the Debian 7.5 image, so I ran a 
git pull from /opt/scripts and got the script.

What do I need to do to flash the eMMC at reboot? Should I use a different 
script that the v3 one? Or will it fail for other reasons?

I am willing to do it manually with dd. It looks like I want something like 

dd if=/dev/mmcblk0 of=/dev/mmcblk1

But the drive at /dev/mmcblk0 is 16Gb (the size of my microSD card) and the 
eMMC drive is only 4Gb, so it fails. Maybe I need to make a partition on 
/dev/mmcblk1 and do something like the following. How should I set up that 
partition on the command line?

dd if=/dev/mmcblk0p1 of=/dev/mmcblk1p1


Backstory: I am trying to upgrade from 2Gb BeagleBoneBlack boards to 4Gb 
BeagleBoneBlack Industrial boards from Element14. The old boards have 
Debian 7.5 (2014-05-14) on them and work just fine. The BBB Industrial 
boards come with Debian 7.9, and I haven't been able to get serial 
communication over /dev/ttyO1 working. Serial communication is working fine 
on a BBB Industrial from the SD card boot of 7.5, so if I could just flash 
7.5 on the new boards, that might be a quicker fix that diagnosing the 
serial communication issues.

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