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Hard Disk Drive Definition
DocumentID: 655599
Revision Date: 29-Feb-96 8:29:37 PM

The information in this document applies to:
WordPerfect® 5.1 for DOS

Problem

Solutions: Hard Disk Drive: A disk drive that uses multiple, non-removable platters turning non-stop at high speed to store much more data than can fit on a diskette, and to access the data more quickly.

Hard disk drives are used to store program instructions which the computer cannot store on its own. Invented by IBM in 1973, the hard disk sometimes called the winchester after the code name assigned to the development project. A typical hard disk will contain 3 to 5 disks which are covered with magnetically sensitive material necessary for program storage. The disks rotate at about 3600 RPM (Rotations Per Minute) or 60 times per second. Extended arms called read/write heads float on a thin pocket of air over the disks so that no wear on the disk itself occurs.

As the computer gives the hard disk commands, the read/write heads either read information from the hard disk or write information to the hard disk. Hard disks can store mass amounts of information; some are capable of storing up to 8 gigabytes.

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