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In magnetic disk ________ stores information on a sector magnetically as reversals of the direction of magnetization of the magnetic material. (a) Read–write head (b) Read-assemble head (c) Head–disk assemblies (d) Disk arm This question was posed to me in homework. I want to ask this question from Magnetic Disk and Flash Storage in division Storage and File Structures of Database Management

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The correct option is (d) Disk arm The best explanation: Each side of a platter of a disk has a read–write head that moves across the platter to access different tracks.

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