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<a accesskey="3" href="page.php?w=Hard_disk_drive&amp;p=2">3.Next</a>
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<p>A <b>hard disk drive</b> (<b>HDD</b>), <b>hard disk</b>, <b>hard drive</b>, or <b>fixed disk</b> is an electro-mechanical <a href="page.php?w=computer_data_storage">computer data storage</a> device that stores and retrieves <a href="page.php?w=digital_data">digital data</a> using <a href="page.php?w=magnetic_storage">magnetic storage</a> with one or more rigid rapidly rotating <a href="page.php?w=hard_disk_drive_platter">platters</a> coated with magnetic material. The platters are paired with <a href="page.php?w=disk_read-and-write_head">magnetic heads</a>,</p><p>
<a accesskey="3" href="page.php?w=Hard_disk_drive&amp;p=2">3.Next</a>
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