Hi, i see that had a surplus "i" in the arguments of the xorriso run for repacking the image: > -b /boot/boot.img -no-emul-boot -boot-load-size i0 \ This should have been -b /boot/boot.img -no-emul-boot -boot-load-size 0 \ The program run with "i0" succeeds but creates El Torito as with -boot-load-size 1. This may or may not be decisive. Have a nice day :) Thomas