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A disk image is a snapshot of a storage device's structure and data typically stored in one or more computer files on another storage device. [ 1][ 2] Traditionally, disk images were bit-by-bit copies of every sector on a hard disk often created for digital forensic purposes, but it is now common to only copy allocated data to reduce storage ...
Disk image. Standard. ISO 9660, UDF. An optical disc image (or ISO image, from the ISO 9660 file system used with CD-ROM media) is a disk image that contains everything that would be written to an optical disc, disk sector by disc sector, including the optical disc file system. [ 3] ISO images contain the binary image of an optical media file ...
System image. In computing, a system image is a serialized copy of the entire state of a computer system stored in some non-volatile form, such as a file. If a system has all its state written to a disk (i.e. on a disk image ), then a system image can be produced by copying the disk to a file elsewhere, often with disk cloning applications.
A hard disk drive ( HDD ), hard disk, hard drive, or fixed disk[ a] is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magnetic material.
Type of format. Virtual machine disk image. VHD ( Virtual Hard Disk) and its successor VHDX are file formats representing a virtual hard disk drive (HDD). They may contain what is found on a physical HDD, such as disk partitions and a file system, which in turn can contain files and folders. They are typically used as the hard disk of a virtual ...
e. An optical disc is a flat, usually [ note 1] disc-shaped object that stores information in the form of physical variations on its surface that can be read with the aid of a beam of light. Optical discs can be reflective, where the light source and detector are on the same side of the disc, or transmissive, where light shines through the disc ...
A variant of IMG, called IMZ, consists of a gzipped version of a raw floppy disk image. These files use the .imz file extension, and are commonly found in compressed images of floppy disks created by WinImage. QEMU uses the .img file extension for raw images of hard drive disks, calling the format simply "raw".
An accretion disk is a structure (often a circumstellar disk) formed by diffuse material [ a] in orbital motion around a massive central body. The central body is most frequently a star. Friction, uneven irradiance, magnetohydrodynamic effects, and other forces induce instabilities causing orbiting material in the disk to spiral inward toward ...
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