What Does ISO Image Mean?
An ISO image is a type of disc image that acts as an archive file that is comprised of all sector data contained in an optical disc, including its file system. Image files have a file extension of .iso, which is taken from the ISO 9660 file system used in CD-ROM media. However, ISO images may also contain a Universal Disk Format (UDF) file system, which is used in DVDs and Blu-ray discs.
Techopedia Explains ISO Image
An ISO image contains exact copies of an optical media file system with the data in binary format and copied exactly as it was stored on the disc. The data within an ISO image is ordered according to the file system used on the optical disc from which it was created. ISO Images only store data, disregarding control headers and correction data, hence they become smaller than the raw data on the optical media.
