What Are Read / Write Heads?
Hard disk read/write heads are mechanisms that read data from or write data to disk drives. The read/write heads have gone through a number of changes over the years. In a hard disk drive, the read/write heads ‘fly’ above the disk surface with clearance of as little as 3 nanometres. The “flying height” is constantly decreasing to enable higher areal density. The flying height of the head is controlled by the design of an air-bearing etched onto the disk-facing surface of the slider.