What Does Disk Image Mean?
A disk image is a single file or storage device that holds a replica of all data on a storage medium or device, such as a hard drive, tape drive, CD, DVD, floppy disk or key drive. A disk image is usually created through a sector-by-sector replication of the original - or source - storage medium, including the structure (directories and folders) and contents (files).
Techopedia Explains Disk Image
Disk images were first used to back up and clone floppy disks. Exact disk structuring was necessary to have a similar copy of a floppy disk. Disk imaging became an efficient means of backing up data.
