Posted by admin in Presently almost every desktop computer, and server today consists of one or more hard drives. Even laptops can have a good hard drive with about 1 terabyte of space in it. Each mainframe and supercomputer is generally connected to hundreds of such HDD’s. One shall also find a VCR-type device and camcorders which hard disks use instead of tapes.
Hard drives store changing digital information in comparatively permanent form and give the capability to remember things when the power is out. A hard disk drive is frequently shortened as “hard disk”, ”hard drive” or “HDD” and is a non-volatile storing device that digitally stores encoded data on fast rotating platters of magnetic surfaces. Actually “drive” refers to device unique from its medium like a tape drive and its tape or floppy disk drive and its floppy disk.
Initially HDD’s were removable media nevertheless now they are sealed unit having fixed media. A normal desktop machine shall consist of a hard disk with capacity of 10 and 40 gigabytes. Data on the computer is stored on the disk in the form of files. A file is actually a collection of bytes and the bytes may be the ASCII codes for the characters of a text file or even instructions of a software application for the computer to execute or records of a data base.
On running of a computer program, when the computer asks for a file, the hard drive retrieves its bytes and sends them to the CPU individually.
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