The data sectors of a floppy diskette are "storage areas" for data on the disk. The data is "written" in a rust-like material on the disk by the |read/write head| of the disk drive. When writing, the head creates a magnetic field with its bias coil, and this field alters the polarity of the magnetic charge on the disk. This is interpreted as a 'zero' if the polarity is in one orientation, and a 'one' if in another. On reading, the head detects which orientation the media is in and send this information along to the computer to be processed.