usboot

No one is delayed.

my new USB disk 

I did not use g_mass_storage because I found that the kernel would crash when unloading this module. I used the Android gadget and I recommend this gadget because it can be used with one more gadgets at the same time.
You are right. I will upload the full sources during my spare time. The following are the core codes :
if [ -b "/dev/mmcblk0p2" ]; then echo "$_disk" > /sys/class/android_usb/f_mass_storage/lun1/file echo "$_disk2" > /sys/class/android_usb/f_mass_storage/lun2/file else echo "0" > /sys/class/android_usb/f_mass_storage/lun2/ro echo "0" > /sys/class/android_usb/f_mass_storage/lun2/removable echo "/dev/mmcblk0" > /sys/class/android_usb/f_mass_storage/lun2/file fi echo "USBoot" > /sys/class/android_usb/android0/iManufacturer echo "USBootPi" > /sys/class/android_usb/android0/iProduct echo "f833" > /sys/class/android_usb/android0/idVendor echo "0001" > /sys/class/android_usb/android0/idProduct echo "mass_storage" > /sys/class/android_usb/android0/functions echo "2" > /sys/bus/platform/devices/sunxi_usb_udc/otg_role echo "1" > /sys/class/android_usb/android0/enable

8G Class4

8G Class4

The english readme is ready: https://github.com/usboot/USBootPi