WHAT WE ALL KNOWS ABOUT HARD DISK...

From the info that i knows and get, hard disk have a many definitions and many people have a difference meaning. Below i tell all of you about definition of hard disk:

• hard disc: a rigid magnetic disk mounted permanently in a drive unit
  
• A hard disk drive (often shortened as hard disk, hard drive, or HDD) is a non-volatile storage device that stores digitally encoded data on rapidly rotating rigid (i.e. hard) platters with magnetic surfaces. ...
  
• One of a series of parallel magnetic recording disks in a drive unit, used for the recording and retrieval of digital information; used especially in personal computers; The unit itself, and all the disks within it
  
• The hard disk drive (HDD) of the computer is where information is stored. Applications as well as files are stored on the HDD. The bigger the HDD the more data that can be stored.
  
• Often called the 'C-Drive' or 'C:' in computers running Microsoft Windows, the Hard Disk is the nonvolatile magnetic storage device used to retain data for extended periods of time. Unlike a 'network' or 'server' drive, it is often NOT backed up. ...
  
• Is a fixed disk inside the computer and is used to store vast amounts of data on it. On a PC it is often referred to as the C: drive.
  
• part of the hard drive that stores and provides relatively quick access to large amounts of data on an electromagnetically charged surface or set of surfaces.
  
• A rigid non-removable disk in a computer and the drive that houses it. Hard disks store more data and can be accessed quicker than floppy disks.
  
• Common digital storage component in a computer.
  
• A computer storage medium that is a fixed part of the computer's hardware (specifically, the data storage part of the computer's hard disk drive). As contrasted to floppy disk, a portable computer storage medium that can be inserted into or removed from various computers easily and quickly.
  
• Hard Drive
  
• The main disk inside a computer used for storing programs and information. It is hard because it is metal. See floppy disk.
  
• Used to store data and programs outside of the computer's RAM. Hard disk systems have faster read/write access times, high storage capacity, and a greater reliability than do floppy or micro-floppy disk systems.
  
• As its name suggests this is a circular material made from either a metal alloy or hardened glass. It is coated with a magnetic material that is composed of many particles which align themselves under the influence of a magnetic field. ...
  
• A storage medium that uses several ridged disks, housed together with a recording head in a sealed mechanism. The hard disk is usually found inside the main computer box, and is often denoted as drive C. Some computers have more than one hard disk, the drives may then be denoted C, D, etc.