Hi, >>> > the parameter is file=/dev/mmcblk0p1 >> >> Perhaps you have already realized this... mmcblk0p1 is the first >> partition of the mmcblk0 device. Block 0 of the partition is the boot >> sector, not the MBR. The MBR is block 0 of the mmcblk0 device. So >> perhaps you really meant to use: >> >> file=/dev/mmcblk0 >> >>> I see a problem here. The first 32 bytes of the boot sector is >>> correct. The rest of the bytes are 00000000, which is wrong. See the >>> usbmon trace below. >>> >> >> Are you certain this is wrong? All those 0's could be unoccupied >> entries in a FAT. > > For testing purpose, i would like to create a backing file, and then > use it with g_file_storage, such as below: > > # modprobe g_file_storage file=/tmp/backing_file > > Can i use an ordinary text file as the backing file? I find a link which contains answers to my question above. http://www.linux-usb.org/gadget/file_storage.html Thanks, victor -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
