How is data stored on magnetic storage devices?
Data in a computer is stored magnetically on the hard disk drive (HDD). All of a computer’s data, including the operating system (OS) and user documents, are permanently stored inside the HDD.FormThe HDD is a rectangular metallic box found inside a desktop computer’s tower casing. The data is physically written on round, disk-shaped objects called platters, stacked vertically inside the HDD. The platters are aluminum disks, layered with a thin magnetic film.HeadsThe platters inside the HDD spin very fast, with components known as read/write heads hovering above the disks. There are two read/write head for each double-sided platter, one for the top and one for the bottom.Actuator & ArmsData is written magnetically on the platters by the read/write heads as sequences of 0s and 1s. When a piece of information is about to be accessed or recorded, tiny movable components known as actuators and arms position the heads in the region on the platter where the information is (or will be) recorde
