IMG , in computing, refers to binary files with the .img filename extension that store raw disk images of floppy disks , hard drives , and optical discs or a bitmap image – .img .
23-428: IMZ may refer to: IMZ (file format) , a compressed floppy disk image Irbitskiy Mototsikletniy Zavod , a Russian motorcycle manufacturer The International Music and Media Centre Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title IMZ . If an internal link led you here, you may wish to change
46-506: A FAT boot sector , which can be used to identify its file system. Disc images of optical media are usually accompanied by a descriptor file which describes the layout of the disc, and includes information such as track limits which are not stored in the raw image file. The .img file extension was originally used for floppy disk raw disk images only. A similar file extension, .ima , is also used to refer to floppy disk image files by some programs. A variant of IMG, called IMZ, consists of
69-441: 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". CloneCD stores optical disc images in .img files and generates additional CloneCD Control Files (with .ccd extension) for each image to hold
92-439: A magnetic disk or of an optical disc . Since a raw image consists of a sector -by-sector binary copy of the source medium, the actual format of the file contents will depend on the file system of the disk from which the image was created (such as a version of FAT ). Raw disk images of optical media (such as CDs and DVDs ) contain a raw image of all the tracks in a disc (which can include audio, data and video tracks). In
115-460: A sector -by-sector copy of the data on an optical disc, stored inside a binary file. Other than ISO 9660 media, an ISO image might also contain a UDF (ISO/IEC 13346) file system (commonly used by DVDs and Blu-ray Discs ), including the data in its files in binary format, copied exactly as they were stored on the disc. The data inside the ISO image will be structured according to the file system that
138-407: A collection of files by optical disc authoring software , or from a different disk image file by means of conversion . Software distributed on bootable discs is often available for download in ISO image format. And like any other ISO image, it may be written to an optical disc such as CD, DVD and Blu-Ray. Optical-disc images are uncompressed and do not use a particular container format; they are
161-728: A continuous stream of encoded audio data. This audio is stored on sectors of 2352 bytes different from those that store a file system and it is not stored inside files; it is addressed with track numbers , index points and a CD time code that are encoded into the lead-in of each session of the CD-Audio disc. Video CDs and Super Video CDs require at least two tracks on a CD, so it is also not possible to store an image of one of these discs inside an ISO image file, however an .IMG file can achieve this. Formats such as CUE/BIN , CCD/IMG and MDS/MDF formats can be used to store multi-track disc images, including audio CDs. These formats store
184-473: A header and many subfiles and used to store the maps for its GPS units. The raw IMG file format is used by several tools: ISO image 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 . ISO images contain
207-424: A multiple of 2,048. Any single- track CD-ROM , DVD or Blu-ray disc can be archived in ISO format as a true digital copy of the original. Unlike a physical optical disc, an image can be transferred over any data link or removable storage medium. An ISO image can be opened with almost every multi-format file archiver . Native support for handling ISO images varies from operating system to operating system. With
230-437: A raw disc image of the complete disc, including information from all tracks, along with a companion file describing the multiple tracks and the characteristics of each of those tracks. This would allow an optical media burning tool to have all the information required to correctly burn the image on a new disc. For audio CDs, one can also transfer the audio data into uncompressed audio files like WAV or AIFF , optionally reserving
253-400: A raw disk image of a magnetic disk corresponds to: E.g. for 80 cylinders (tracks) and 2 heads (sides) with 18 sectors per track: For optical discs such as CDs and DVDs, the raw sector size is usually 2,352, making the size of a raw disc image a multiple of this value. ISO images are another type of optical disc image files, which commonly use the .iso file extension, but sometimes use
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#1732780924274276-431: A single ISO image; at most, an ISO image will contain the data inside one of those multiple tracks, and only if it is stored inside a standard file system. This also means that audio CDs , which are usually composed of multiple tracks, can not be stored inside an ISO image. Furthermore, not even a single track of an audio CD can be stored as an ISO image, since audio tracks do not contain a file system inside them, but only
299-447: A suitable driver software, an ISO can be " mounted " – allowing the operating system to interface with it, just as if the ISO were a physical optical disc. Most Unix -based operating systems, including Linux and macOS , have this built-in capability to mount an ISO. Versions of Windows, beginning with Windows 8 , also have such a capability. For other operating systems, separately available software drivers can be installed to achieve
322-542: Is also a planar bitmap graphics file using simple run-length encoding, originating with Digital Research 's GEM . It was commonly used on the Atari ST line of home computers, but also with some GEM-based PC software such as Corel Ventura or Timeworks Publisher . In addition, .img is an Apple Disk Image used by the Mac OS X or macOS operating system. Garmin .img is a hard-disk image file format which contains
345-614: The .img file extension as well. They are similar to the raw optical disc images, but contain only one track with computer data obtained from an optical disc. They cannot contain multiple tracks, nor audio or video tracks. They also do not contain the control headers and error correction fields of CD-ROM or DVD sectors that raw disc images usually store. Their internal format follows the structure of an optical disc file system, commonly ISO 9660 (for CDs) or UDF (for DVDs). The CUE/BIN and CCD/IMG formats, which usually contain raw disc images, can also store ISO images instead. .img
368-420: The binary image of an optical media file system (usually ISO 9660 and its extensions or UDF ), including the data in its files in binary format, copied exactly as they were stored on the disc. The data inside the ISO image will be structured according to the file system that was used on the optical disc from which it was created. ISO images can be created from optical discs by disk imaging software , or from
391-408: The case of CD-ROMs and DVDs, these images usually include not only the data from each sector, but the control headers and error correction fields for each sector as well. Since IMG files hold no additional data beyond the disk contents, these files can only be automatically handled by programs that can detect their file systems . For instance, a typical raw disk image of a floppy disk begins with
414-417: The file system inside the ISO image is actually UDF and not ISO 9660. ISO files store only the user data from each sector on an optical disc, ignoring the control headers and error correction data, and are therefore slightly smaller than a raw disc image of optical media. Since the size of the user-data portion of a sector (logical sector) in data optical discs is 2,048 bytes, the size of an ISO image will be
437-453: The link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=IMZ&oldid=760208829 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages IMA (file format) The .img filename extension is used by disk image files, which contain raw dumps of
460-505: The metadata (see CD ripping ). Most software that is capable of writing from ISO images to hard disks or recordable media (CD / DVD / BD) is generally not able to write from ISO disk images to flash drives . This limitation is more related to the availability of software tools able to perform this task, than to problems in the format itself. However, since 2011, various software has existed to write raw image files to USB flash drives. .ISO files are commonly used in emulators to replicate
483-410: The necessary metadata . The CUE/BIN format stores disc images in .bin files, which are functionally equivalent to .img image files, and uses .cue files as descriptor files. The file size of a raw disk image is always a multiple of the sector size. For floppy disks and hard drives this size is typically 512 bytes (but other sizes such as 128 and 1024 exist). More precisely, the file size of
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#1732780924274506-452: The same objective. A CD can have multiple tracks , which can contain computer data, audio, or video. File systems such as ISO 9660 are stored inside one of these tracks. Since ISO images are expected to contain a binary copy of the file system and its contents, there is no concept of a "track" inside an ISO image, since a track is a container for the contents of an ISO image. This means that CDs with multiple tracks can not be stored inside
529-423: Was used on the optical disc from which it was created. The .iso file extension is the one most commonly used for this type of disc images. The .img extension can also be found on some ISO image files, such as in some images from Microsoft DreamSpark ; however, IMG files , which also use the .img extension, tend to have slightly different contents. The .udf file extension is sometimes used to indicate that
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