Read/ Write head detail is shown in the Figure 7.5.

                                                    

Figure 7.5: Read / Write details

The head is a relatively small device capable of reading from or writing to a portion of the platter rotating beneath it.

The data on the disk are organized in a concentric set of rings, called track. Each track has the same width as the head. Adjacent tracks are separated by gaps. This prevents error due to misalignment of the head or interference of magnetic fields.