Define magnetic disk.

Magnetic Disk:

A magnetic disk is a storage device that writes rewrites and accesses data using a magnetization mechanism. In the form of tracks, spots, and sectors, it is covered with a magnetic coating and store data. Popular examples of magnetic discs include hard discs, zip discs, and floppy disks.

A magnetic disc consists mostly of a magnetic surface that rotates (called a platter) and a mechanical arm that passes over it. They shape a 'comb' together. Use the mechanical arm to read and write from the disc. Using a magnetization process, data on a magnetic disc is read and written.

The plate begins to turn with high speed, while the head of the arm rolls around the floor. The head floats on a thin air layer while the whole package is hermetically filtered. Fewer spots on the disc surface are magnetized by applying a small current to the head and storing data. Vice versa, a small current can be added to those small places on the plate when the leader needs to read the information.

A large computer consisting of 50 21-inch (53-cm) discs was the first magnetic hard drive designed by IBM in 1956. It was able to store only 5 megabytes of data, despite its size. Since then, magnetic discs have repeatedly increased their storage space, although their size has decreased significantly.

With their volume easily exceeding one or more terabytes, the scale of current hard discs is just around 3.5 inches (approx. 9 cm). Floppy discs, which shrank from the initial 8 inches in the late 60s, to the much smaller 3.5 inches in the early 90s, had a similar fate. However, following the advent of CD-ROMs in the late 1990s, floppy disks gradually became obsolete and now have all but completely vanished.