Hi 

I've been following the steps at 
https://eewiki.net/display/linuxonarm/BeagleBone+Black; Trying build the 
latest mainline kernel with the minimum Debian filesystem.

I don't quite understand what is happening in the following steps under "Setup 
microSD/SD card"












*sudo dd if=/dev/zero of=${DISK} bs=1M count=10sudo dd if=./u-boot/MLO 
of=${DISK} count=1 seek=1 conv=notrunc bs=128ksudo dd 
if=./u-boot/u-boot.img of=${DISK} count=2 seek=1 conv=notrunc bs=384kCreate 
Partition Layout:sudo sfdisk --in-order --Linux --unit M ${DISK} 
<<-__EOF__1,,0x83,*__EOF__Format Partitions:for: DISK=/dev/mmcblk0sudo 
mkfs.ext4 ${DISK}p1 -L rootfs*

I realise the a card is being wiped and then formatted but I'm not sure 
why. 
The default Debian sd card image (and other images I found)  Have separate 
boot partition, however in this example only one partition is created.  

Why is this tutorial different? 

Is it just a new feature of U-boot?

Also after following the all the steps in the tutorial the the beagelbone 
black will boot from the SD card but it will hang on the line "net eth0: 
phy 4a101000.mdio:01 not found on slave 1" for about 30 sec before showing 
the login prompt but that is probably a question for another thread. 

David

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