In fact, the Android program itself features a setting for the reading speed of the memory card, so

Use pen drive data recovery free to enter sys / dev / block / 179: 0 / bdi in turn, discover read_ahead_kb, long press to select and open having a text editor, you are going to see the data inside, just adjust it right here, you may change to 1024 or 2048, Or 3072, etc., nevertheless it is greatest to seek out the one particular that suits you, not only a image height!

Note that data recovery flash memory is going to be restored just after booting!