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A disk image is a computer file containing the complete contents and structure of a data storage device. The term has been generalized to cover any such file, whether taken from an actual physical storage device or not. Image File history File links Please see the file description page for further information. ...
An ISO image (.iso) is an informal term for a disk image of an ISO 9660 file system. ...
In computing, optical disc authoring, including CD authoring and DVD authoring, known often as burning, is the process of recording source material—video, audio or other data—onto an optical disc (compact disc or DVD). ...
In computing, sound reproduction, and video, an optical disc is flat, circular, usually polycarbonate disc whereon data is stored. ...
Optical disc authoring software is computer software for authoring optical discs including CD-ROMs and DVDs. ...
Packet writing is a technique used to allow writeable CD-ROM and DVD-ROM media to be used in a similar manner to a floppy disk. ...
Interference colors. ...
The CD-ROM (an abbreviation for Compact Disc Read-Only Memory (ROM)) is a non-volatile optical data storage medium using the same physical format as audio compact discs, readable by a computer with a CD-ROM drive. ...
A CD-R (Compact Disc-Recordable) is variation of the Compact Disc digital audio disc invented by Philips and Sony. ...
Compact Disc ReWritable (CD-RW) is a rewritable optical disc format. ...
DVD-R writing/reading side DVD-R with purple dye, 4. ...
A DVD+R disc The title given to this article is incorrect due to technical limitations. ...
A DVD+R disc A DVD+R is a writable optical disc with 4. ...
DVD+R DL (Double Layer), also known as DVD+R9, is a derivative of the DVD+R format created by the DVD+RW Alliance. ...
The title given to this article is incorrect due to technical limitations. ...
A spindle with discs of the DVD+RW format A DVD+RW is a rewritable optical disc with equal storage capacity to a DVD+R, typically 4. ...
You can recognize a DVD-RAM immediately because visually there are lots of little rectangles distributed on the surface of the data carrier. ...
The Rainbow Books are a collection of standards defining the allowed formats of compact discs. ...
ISO 9660, a standard published by the International Organization for Standardization, defines a file system for CD-ROM media. ...
Joliet is the name of an extension to the ISO 9660 file system. ...
The Rock Ridge Interchange Protocol (RRIP, IEEE P1282) is an extension to the ISO 9660 volume format which adds POSIX file system semantics. ...
What is the El Torito CD-ROM specification? El Torito is a specification published in 1994 by Phoenix Technologies and IBM that extends the ISO 9660 specification for CD-ROM drives by further adding functionality to the ability to boot from a CD-ROM. In short, it allows a CD...
For other meanings of UDF, see UDF (disambiguation). ...
Mount Rainier is an expansion to the Universal Disk Format (UDF). ...
A file in a computer system is a stream (sequence) of bits stored as a single unit, typically in a file system on disk or magnetic tape. ...
In computing, a data storage device—as the name implies—is a device for storing data. ...
An ordinary backup only backs up the files it can access; boot information, and files locked by an operating system or being changed at the time, may not be saved. A disk image contains all these, and faithfully replicates the data, so it is commonly used for backing up disks with operating systems, or bootable CD/DVDs. A BOOTING is any exercise of the verb to boot. ...
In computing, an operating system (aka, OS) is the system software responsible for the direct control and management of hardware and basic system operations. ...
In computing, booting is a bootstrapping process that starts operating systems when the user turns on a computer system. ...
CD may stand for: Compact Disc Canadian Forces Decoration Cash Dispenser (at least used in Japan) CD LPMud Driver Centrum-Demokraterne (Centre Democrats of Denmark) Certificate of Deposit České Dráhy (Czech Railways) Chad (NATO country code) Chalmers Datorförening (computer club of the Chalmers University of Technology) a 1960s...
DVD-R writing/reading side DVD-R with purple dye, 4. ...
The image is saved as a file, which for a full CD or system disk may be quite large (~10 MB to several GB). This file can be saved onto a hard drive, CD, DVD or other media, for later use. A megabyte is a unit of information or computer storage equal to one million bytes. ...
A gigabyte (derived from the SI prefix giga-) is a unit of information or computer storage equal to one billion bytes. ...
Typical hard drives of the mid-1990s. ...
Disk images can either be compressed using some type of compression algorithm like LZW, or uncompressed ("raw"). Images of CD-ROMs most often carry the file name extension .iso, referring to the ISO 9660 file system commonly used on such discs. The .iso format is the most common format for Linux distributions and other online images. Other common CD image formats are .nrg (Nero Burning ROM's proprietary format), and .bin/.cue. In computer science, data compression or source coding is the process of encoding information using fewer bits, or information units, thanks to specific encoding schemes. ...
LZW (Lempel-Ziv-Welch) is an implementation of a lossless data compression algorithm created by Abraham Lempel and Jacob Ziv. ...
Raw describes material that is in its natural unprocessed form, or has not had the final stages of processing. ...
The CD-ROM (an abbreviation for Compact Disc Read-Only Memory (ROM)) is a non-volatile optical data storage medium using the same physical format as audio compact discs, readable by a computer with a CD-ROM drive. ...
An ISO image (.iso) is an informal term for a disk image of an ISO 9660 file system. ...
ISO 9660, a standard published by the International Organization for Standardization, defines a file system for CD-ROM media. ...
A Linux distribution is a Unix-like operating system comprising the Linux kernel, the GNU operating system (or most of it), other assorted free software/open-source software, and possibly proprietary software. ...
Nero Burning ROM is a popular CD and DVD authoring program for Microsoft Windows and Linux by Nero AG, formerly Ahead Software. ...
CD sector size FAQ - A standard 74 min CD is made by 333,000 sectors.
- Each sector is 2352 bytes, and contains 2048 bytes of PC (MODE1) Data, 2336 bytes of PSX/VCD (MODE2) Data or 2352 bytes of AUDIO.
- The difference between sector size and data content are the Headers info and the Error Correction Codes, that are big for Data (high precision required), small for VCD (standard for video) and none for audio.
- If you extract data in RAW format (standard for creating images) you always extract 2352 bytes per sector, not 2048/2336/2352 bytes depending on data type (basically, you extract the whole sector). This fact has two main consequences:
- You can record data at very high speed (40x) without losing information, but if you try to do the same with PSX or Audio you get unreadable CD (for PSX) or audio CD with lots of clicks because there are no error correction codes (and error are more likely to occur if you record at high speed.)
- On a 74 min CD you can fit very large RAW images,up to 333,000 x 2352 = 783,216,000 bytes (747 Mb). This should be the upper limit for a RAW image created from a 74 min CD. Remember that if you store standard data (backup files), you can burn only 333,000 x 2048 = 681,984,000 bytes (the well known 650 MB limit).
- Please note that an image size is ALWAYS a multiple of 2352 bytes (you extract SECTORS), if extracted in RAW mode.
A sector is a part of a whole. ...
Header may be used in a number of different contexts: Header in automotive engineering refers to an exhaust manifold. ...
Backup in computer engineering refers to the copying of data for the purpose of having an additional copy of an original source. ...
.CUE/.BIN The .cue / .bin format developed by Jeff Arnold for CDRWIN can encode CD Image formats in either 2048 or 2324 bytes per sector. The BIN file is a binary copy of an entire CD/DVD disc. The BIN file contains all the data stored on the original disc, not only its files and folders but also its system-specific information such as, boot loaders, volume attributes and any other data. BIN files are usually bigger than .iso files because in contrast to .iso files they are not a bit for bit copy of the entire CD/DVD. A BOOTING is any exercise of the verb to boot. ...
Introduction and Definition In the context of computer operating systems, volume is the term used to describe a single accessible storage area with a single filesystem, typically (though not necessarily) resident on a single partition of a hard disk. ...
.bin files (or .RAW files) are images extracted in pure RAW format. That is 2352 bytes sectors, the full CD sector content: user data, sector header, error correction codes (ECC) and error detection codes (EDC). Once again, each sector is converted to digital data in the .BIN file, but more stuff is copied and the resulting file will be bigger. The .BIN file should be 251,000 x 2352 = 590,352,000 bytes big. This process will copy ANYTHING on the disc, so it is useful for exotic discs (multiple tracks, mixed track type Audio+Data or Data+Audio) and for non-PC CDs (PSX, VCD, MAC).
The .cue file is a cue sheet that describes the data stored in the .bin file. The .cue file is in fact a plain text file. A typical .cue file is as follows: A cue sheet, or cue file, is an ASCII (plain text) file that specifies how the tracks of a compact disc should be laid out. ...
FILE "IMAGE.BIN" BINARY TRACK 01 MODE1/2352 INDEX 01 00:00:00 The file would be saved as IMAGE.CUE
.ISO The .iso file is a digital copy of CD contents made this way: the ripper searches for the sectors of the CD that have been used, say 251,000 for instance (there are 330,000 sectors on a 74 min CD and 360,000 sectors on a 80 min CD). Each sector is copied on the .ISO file, one by one, and only 2048 bytes for each sector (only the ones containing the user data) are copied. The .ISO file should then be of size 251,000 x 2048 = 514,408,000 bytes. (It will be slightly bigger if the extractor puts a header on the file, like Nero .NRG files that are .ISO files plus a small file header) An ISO image (.iso) is an informal term for a disk image of an ISO 9660 file system. ...
A CD ripper, CD grabber or CD extractor is a piece of software designed to extract raw digital audio (in format commonly called CDDA) from a compact disc to a file or other output. ...
Header may be used in a number of different contexts: Header in automotive engineering refers to an exhaust manifold. ...
Nero Nero Claudius Caesar Augustus Germanicus (December 15, 37–June 9, 68), born Lucius Domitius Ahenobarbus, also called (50–54) Nero Claudius Drusus Germanicus, was the fifth and last Roman Emperor of the Julio-Claudian dynasty. ...
.IMG .img is the filename extension usually use for the disk image of floppy disks, and sometimes, hard disks. First populated by DOS-based software HD-Copy DiskDupe and now WinRaWrite, is a handy way to archive a floppy disk completely, including bootable ones. In fact there is no "format" in it, just a raw dump of the content of the disk. RaWrite is a DOS program that writes a disk image file to a floppy disk. ...
In computing, booting is a bootstrapping process that starts operating systems when the user turns on a computer system. ...
Raw describes material that is in its natural unprocessed form, or has not had the final stages of processing. ...
Look up Dump in Wiktionary, the free dictionary Dump can mean: A landfill (usually a less formal and well-contained one). ...
Some newer software like WinImage supports zipped version of the format and the extension is .imz.
Apple Disk Image
 For Macintosh computers, disk images have been available as a feature of the operating system before System 7. Mounting a compatible disk image is achieved by double-clicking (opening) the image file. The archived volume is then available as a normal disk volume, indistinguishable at first glance from the physical volume. Modern Apple Disk Images for Mac OS X typically end in .dmg. Using NetBoot, client computers can start up over a network from a server-based disk image that contains system software.
Image File history File links Apple_Disk_Image. ...
The Macintosh project started in early 1979 with Jef Raskin, an Apple employee, who envisioned an easy-to-use, low-cost computer for the average consumer. ...
System 7 (codenamed Big Bang) was a version of Mac OS, the operating system of the Apple Macintosh computer. ...
Mouse properties in GNOME, with a setting for double-click speed A double-click is the act of pressing a computer mouse button twice quickly without moving the mouse. ...
Mac OS X is the operating system which is included with all shipping Apple Macintosh computers in the consumer and professional markets. ...
A file with the extension . ...
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Usage A common use of disk images is for remote distribution of software such as Linux distributions: installation floppy disks or CD-ROMs can be recorded as disk image files, transferred over the Internet, and the contents of the original disk(s) duplicated exactly by end users with their own floppy or CD-R drives. So, user can burn the Isos to convert them in LiveCDs, to try an Operating System, without installing it in the hard disk . A Linux distribution is a Unix-like operating system comprising the Linux kernel, the GNU operating system (or most of it), other assorted free software/open-source software, and possibly proprietary software. ...
A floppy disk is a data storage device that is composed of a ring of thin, flexible (i. ...
A CD-R (Compact Disc-Recordable) is variation of the Compact Disc digital audio disc invented by Philips and Sony. ...
Gnoppix 0. ...
Disk images are also routinely used in connection with software piracy, creating an image of a software package and subsequently distributing it. The copyright infringement of software is often called software piracy by those seeking to reduce its incidence. ...
Another common use is to provide virtual disk drive space to be used by emulators (i.e. QEMU) and virtual machines. This can prevent the CD from getting damaged. It can also reduce bulk when one wishes to carry the contents of the CD along with oneself: one can store disk images to a relatively lightweight and bootable storage device which has a higher storage capacity than that of a CD (i.e. a USB keydrive). An emulator reproducing an arcade games playable atmosphere on a Windows computer. ...
QEMU is free software written by Fabrice Bellard that implements a fast processor emulator, allowing a user to run one operating system within another one. ...
In general terms, a virtual machine in computer science is software that creates an environment between the computer platform and the end user in which the end user can operate software. ...
In computing, booting is a bootstrapping process that starts operating systems when the user turns on a computer system. ...
A USB keydrive, shown with a US quarter coin for scale. ...
See also An ISO image (.iso) is an informal term for a disk image of an ISO 9660 file system. ...
DVD Decrypter is a freeware program that creates backup disc images of DVDs. ...
DAEMON Tools is a proprietary disk image emulator for CD/DVD-ROMs able to mount CD images in virtual drives. ...
RaWrite is an DOS program that writes a disk image file to a floppy disk. ...
RAWRITE2 is a floppy image file writer/creator distributed under version 2. ...
QEMU is free software written by Fabrice Bellard that implements a fast processor emulator, allowing a user to run one operating system within another one. ...
Gnoppix 0. ...
In computing, booting is a bootstrapping process that starts operating systems when the user turns on a computer system. ...
This article needs to be cleaned up to conform to a higher standard of quality. ...
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