What is ISO image?

  • An ISO image or .ISO file is a computer file that acts as an archive file.
  • It is an exact copy of an existing file system.
  • An ISO image is a type of disc image that contains the complete contents of a CDDVD, or other disc or disk.
  • An ISO file generally created via software application which will create, open, and extract CD or DVD image files.
  • Then, convert the extracted image into an ISO file.
  • It enables users to burn an exact copy of the original file onto a CD or DVD.
  • The .iso is a file extension of ISO file.
  • Some ISO image files also contain .img file extension.
  • Sometimes .udf extension is also used for indicating the file system is not ISO 9660, and it is UDF (universal disk format).
  • ISO images may also have UDF (Universal Disk Format) file system, which is used in Blu-ray discs and DVDs.
  • ISO image becomes smaller than the raw data on the optical media because it only stores data, not control headers, and correction data.
  • The term ISO image is widely used to refer to any disc image file of an optical disc, as there is no single standard format.
  • ISO image uses the temporary storage.
  • It creates an identical copy of the original disc before written to a blank CD-R or DVD-R.
  • ISO image file contents may be copied to a local folder as these files may be opened.

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