Difference between revisions of "Hard drive"

Latest revision as of 18:07, 1 March 2016

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+#REDIRECT [[Storage devices]]
-[[File:Seagatefourterabyte.jpeg|350px|thumb|right|A 4TB Seagate Hard Drive]]
-A '''Hard Drive''' is a data storage device used for storing and retrieving digital information using one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. Invented in 1972 by IBM under the name "Smart Drives", hard drives work by a magnetic head on an acutator arm "inscribing" (or writing) data to the platter. Think of someone writing in a book, where the pen is the magnetic head and the platter is the paper. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order rather than sequentially.