Download
http://debian.beagleboard.org/images/bone-debian-7.8-lxde-4gb-armhf-2015-03-01-4gb.img.xz
MD5: c848627722b7a5f7bc89791cc8949e3b
SHA1: 0d36db80b2ca95c1c44d2b5a05dd13864f963ae4
SHA256: 35961c45e843362f8a8ebce938d42500dffa060a5abd84d172ae9cbdfd28836c
SHA512: dfa4d8a0965125875280d6b423acf8704ab72d156f2b8182d00e3f24dbf57dda2055f72f69b75093dea57e4d0174884158f66f9179c2002be00542ff2dfcd66d

Entpacken

unxz -k -d bone-debian-7.8-lxde-4gb-armhf-2015-03-01-4gb.img.xz

MD5: 725d3fa63c0b1b0cc47b44f5c3f56238
SHA1: dedc4dc2e7fdb037fa78db862becbcf706f29ee0
SHA256: 4958c5efcf05b360e9efb5f054811f32918e6ac0bb1d23318b4adf3297aed838
SHA512: c9a810fc927761a4b9eb1504066047049851876ed1253883a5f4eea97beac406ed135fa073d1e55889a4587d006d4667e62138fe936d7a7642fec8b9761b3b4d

mit sd booten
und in /boot/uEnv.txt

##enable BBB: eMMC Flasher:
#cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh

cmdline entkommentieren