<P> A hard disk drive ( HDD ) , hard disk , hard drive or fixed disk is a data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks ( platters ) coated with magnetic material . The platters are paired with magnetic heads , usually arranged on a moving actuator arm , which read and write data to the platter surfaces . Data is accessed in a random - access manner , meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially . HDDs are a type of non-volatile storage , retaining stored data even when powered off . </P>
<P> A hard disk drive ( HDD ) , hard disk , hard drive or fixed disk is a data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks ( platters ) coated with magnetic material . The platters are paired with magnetic heads , usually arranged on a moving actuator arm , which read and write data to the platter surfaces . Data is accessed in a random - access manner , meaning that individual blocks of data can be stored or retrieved in any order and not only sequentially . HDDs are a type of non-volatile storage , retaining stored data even when powered off . </P>
where is the data stored on a hard drive
where is the data stored on a hard drive
rigid rapidly rotating disks ( platters ) coated with magnetic material
rigid rapidly rotating disks ( platters ) coated with magnetic material