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Packet writing
From Wikipedia, the free encyclopedia
| Optical disc authoring | |
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| Optical media types | |
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Packet writing is an optical disc recording technology used to allow writeable CD and DVD media to be used in a similar manner to a floppy disk. Packet writing allows the user to access the contents of a CD-R or CD-RW disc directly through a mounted filesystem (Unix, Linux, Mac OS X) or drive letter (Windows). Without packet writing software, one would have to use regular CD mastering recording software to burn a whole disc.
Packet writing can be used both with once-writeable media such as CD-R, DVD+R and DVD-R, and also with rewriteable media such as CD-RW, DVD+RW and DVD-RW. Once-writeable media cannot however recover space once used; A deleted file does not free space on the disk, and a modified or overwritten file occupies additional space even if the file size has not increased. When the free space on a once-writeable disk is exhausted, no further update to the disk is possible. Rewriteable (RW) media can have all the files deleted on a formatted disc, or information can be overwritten. The downside is CD-RW will fade to the point it isn't readable as the re-crystalized alloy de-crystalizes. Formatted CD-RWs seem to fade out faster than unformatted CD-RWs.[citation needed] People who assume RW media can be updated and reformatted many times just like a floppy disk eventually discover that their data has disappeared. And there are only so many times it can be completely erased and reused - it varies from disc to disc, and can vary with age and use.[citation needed]
Several competing and incompatible packet writing disk formats have been developed, notably those of Roxio Drag-To-Disc (formerly DirectCD), Nero AG InCD, and Sonic Solutions Drive Letter Access. Proposed standards include UDF 1.5 and Mount Rainier.
- Some technical information. Based on Usenet newsgroups FAQ
- Packet Writing on CDRW and DVDRW media - Linux tutorial (published November 10, 2005)
- Understanding CD-R & CD-RW by Hugh Bennett
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