Dieharder file_input_raw format

I am generating true physical random numbers, and I want to test them with dieharder. It is not quite clear to me how the input file should look like. I just put the data in a data.txt where in each line I write 32 bits, and I used the following command: "dieharder -g 201 -f data.txt -a" . Is that correct? It says that it keeps rewinding the file for many times. Is it this related with the wrong format or with a limited size of my input file (120MB)? Thanks for your help. Regards