Hello Lee,

my process is that I have a running Linux on a bootable SD card.
As a autostart service, there is a scripted executed, which performs

1) partitioning of the eMMC card
2) copy u-boot.bin and MLO to the first sectors of the eMMC 
3) format the 1st (and only) partition with ext4 file system
4) unzip/untar a master tar.gz from the boot media to the data partition
5) patch the extracted uEnv.txt with the actual UUID of the partition on 
eMMC
6) initiate regeneration of ssh host keys (touch /etc/ssh/ssh.regenerate)
7) sync
8) power off

That takes about 1min to flash one Beaglebone. It takes somewhat longer if 
the BBB is not connected to a network, because then it needs a network 
timeout to proceed

cheers, Günter (dl4mea)



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