This allows a user to construct a disc incrementally, as it could be on a rewritable medium like a floppy disk or rewritable CD. Some packet-writing applications do not require writing the entire disc at once, but allow writing of different parts at different times. Otherwise, they must rebuild the image each time they want a copy. If users override this default, telling the application to preserve the image, they can reuse the image to create more copies.
Most disc burning applications silently delete the image from the Temporary folder after making one copy.
However, it is useful to know because creating the disc image is a time-consuming process, while copying the image is much faster. Most optical disc authoring utilities create a disc image and copy it to the disc in one bundled operation, so that end-users often do not know the distinction between creating and burning. Then, one copies the image to the disc (usually write-once media for hard distribution). One may test the image on target devices using rewriteable media such as CD-RW, DVD±RW and BD-RE. To burn an optical disc, one usually first creates an optical disc image with a full file system, of a type designed for the optical disc, in temporary storage such as a file in another file system on a disk drive. This act is usually done illegally, by pirating copyrighted material without permission from the original artists. Optical disc authoring, including CD, DVD, and Blu-ray Disc authoring, is the process of assembling source material-video, audio or other data-into the proper logical volume format to then be recorded ("burned") onto an optical disc (typically a compact disc or DVD).
Compact disc ( CD): CD-DA, CD-ROM, CD-R, CD-RW, 5.1 Music Disc, Super Audio CD ( SACD), Photo CD, CD Video ( CDV), Video CD ( VCD), Super Video CD ( SVCD), CD+G, CD-Text, CD-ROM XA, CD-i, MIL-CD, Mini CD.
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