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Hard disk drive - Wikipedia, the free encyclopedia
A hard disk drive (HDD), commonly referred to as a hard drive, hard disk or fixed disk drive, is a non-volatile storage device which stores digitally encoded data on rapidly ...
What is hard disk? - a definition from Whatis.com
A hard disk is part of a unit, often called a "disk drive," "hard drive," or "hard disk drive," that stores and provides relatively quick access to large amounts of data on an ...
HowStuffWorks "How Hard Disks Work"
Nearly every desktop computer uses one or more hard-disk drives. Your hard disk holds all of the information available on your computer. Take a look inside this incredibly precise ...

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Hard Disk, in computer science, one or more inflexible platters coated with material that allows the magnetic recording of computer data. Hard disks provide faster access to data than floppy disks and are capable of storing much more information. Because platters are rigid, they can be stacked so that one hard-disk drive can access more than one platter. Most hard disks have from two to eight platters.

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