What Does Platter Mean?
A platter is a circular magnetic plate that is used for storing data in a hard disk. It is often made of aluminum, glass substrate or ceramic. A hard disk drive contains several platters that are mounted on the same spindle. The platters rotate when the hard disk is performing read/write operations; the rotations per minute depend on the hard disk model. The platter is very sensitive, and any contamination can often make the affected area unreadable, leading to data loss. The platter is capable of holding large amount of data.
Techopedia Explains Platter
A platter is capable of storing information on both sides. A head is provided between each platter to help in sensing and modifying the states of the platter. This results in two heads on each platter. Sometimes multiple arms are also provided, especially in the case of hard drives that use more than one platter for storing data.
