Magnetic Disk

The Magnetic Disk is Flat, round platter with metallic coating that is rotated beneath read/write heads. It is a Random access device; read/write head can be moved to some place on the platter.

A memory device, like a floppy disk, a hard disk, or a removable cartridge, that is covered with a magnetic coating on which digital information is stored in the type of microscopically small, magnetized needles.