1) The modules usbcore and musb_hdrc are loaded at boot. Thier presence prerequisite
   recognition and identification of events and external usb devices.

2) Connect memory key to the AVM 7270.

   usb \  usb_endpoint  \   usb   \  usb_endpoint  \ usb_device \  usb_endpoint
   1-1 / usbdev1.2_ep00 / 1-1:1.0 / usbdev1.2_ep81 /  usbdev1.2 / usbdev1.2_ep02
         -------+------                                           -------+------
			       !                                                        !
					 +----------- announce device discovery                   !
                                                                         !
                             load usb-storage ---------------------------+

   usbdev1.2_ep02/device/modalias
   usb:v05E3p07A0d0111dc00dsc00dp00ic08isc06ip50

   alias usb:v*p*d*dc*dsc*dp*ic08isc06ip* usb-storage


3) Load module usb-storage.

    module  \    module   \   drivers   \ scsi_host \   scsi  \ scsi_device
	scsi_mod / usb_storage / usb-storage /   host0   / 0:0:0:0 /   0:0:0:0
                            -----+-----
                                 !
   load sd_mod and sg -----------+


4) Load module sd_mod.

   module \ drivers \ scsi_disk \# usb_endpoint #\ block \ block
	sd_mod /   sd    /  0:0:0:0  /#    bounce    #/  sda  /  sda1
                                                   --+--   --+--
                                                     !       !
   perform disk performance adjustment --------------+       !
                                                             !
   swapon / mount partition ---------------------------------+

   Note: Experienced endpoint "bouncing": cause remains unknown.

               remove              !               add
	 usb_endpoint  \  usb_endpoint  \  usb_endpoint  \  usb_endpoint  \ 
   usbdev1.2_ep81 / usbdev1.2_ep02 / usbdev1.2_ep81 / usbdev1.2_ep02 / 

               remove              !               add
	 usb_endpoint  \  usb_endpoint  \  usb_endpoint  \  usb_endpoint  \ 
   usbdev1.2_ep81 / usbdev1.2_ep02 / usbdev1.2_ep81 / usbdev1.2_ep02 / 

               remove              !               add
	 usb_endpoint  \  usb_endpoint  \  usb_endpoint  \  usb_endpoint
   usbdev1.2_ep02 / usbdev1.2_ep81 / usbdev1.2_ep81 / usbdev1.2_ep02