Dictionary Home »
Computer Definitions » read/write head
read/write head - technical definition
A device that reads (senses) and writes (records) data on a magnetic disk or tape. For writing, the surface of the disk or tape is moved past the read/write head. By discharging electrical impulses at the appropriate times, bits are recorded as tiny, magnetized spots of positive or negative polarity.
Thin Film Read/Write Head
The read/write heads on today's magnetic disks are so tiny you need a microscope to see them. The heads are attached to a pair of aerodynamically designed rails, known as a "slider," that keep the head at the proper distance from the disk platter.
GMR and Inductive Technologies
Typical read/write heads use a giant magnetoreresistive (GMR) head for reading and an inductive coil for writing as in this illustration. (Illustration assistance courtesy of Hitachi Global Storage Technologies.)
Learn more about read/write head
