dvdisaster
 | |
 dvdisaster 0.72 | |
| Developer(s) | Carsten Gnörlich |
|---|---|
| Initial release | ? |
| Written in | C |
| Operating system | Cross-platform |
| Available in | English |
| Type | Data recovery |
| License | GPL |
| Website | dvdisaster.net |
dvdisaster is a computer program aimed to enhance data survivability on optical discs by creating error detection and correction data, which is used for data recovery. This program can be used either to generate Error-Correcting Code (ECC) data from an existing media or to augment an ISO image with ECC data prior to being written onto a medium. dvdisaster is free software available under the GNU General Public License.
Recovery modes
When an optical disc is physically damaged (such as by scratching), or has begun to deteriorate, some parts of the data on the disc may become unreadable. By utilizing the ECC data previously generated by dvdisaster, damaged parts of the disc data can be recovered.
The two modes of ECC data generation in dvdisaster make use of Reed–Solomon codes. In RS01 mode, the generated data is created from a disc image and is stored in a separate file, which must be written on some other medium. Alternatively, in RS02 mode, the ECC data is appended to the end of the disc image before the image is burned to disc.
When a CD or DVD has been augmented in RS02 mode, the 'augmented' section of the data remains invisible to the normal user, and the disc remains fully compatable with computers without knowledge of or installation of dvdisaster. In this way a damaged disc may be fully recoverable by installing the software, accessing the Reed-Solomon error correcting code using dvdisaster and rebuilding the image (to hard disk).
dvdisaster can be helpful to recover the contents of a damaged disc even when no ECC data is available. The entire disc can be read into an image, skipping damaged parts. dvdisaster can then repeatedly rescan just the missing parts until all damaged areas have been filled in by correct data.
See also
- Data recovery
- Error detection and correction
- Optical disc authoring
- Reed–Solomon error correction
- Parchive
- List of data recovery software
References
- Ben Martin (February 7, 2008) Use dvdisaster to protect backups on optical media, Linux.com
- Template:It icon Andrea Ghirardini, Gabriele Faggioli, Computer forensics: Guida completa, Apogeo Editore, 2007, ISBN 88-503-2593-2, pp. 345–347
- Shashank Sharma (March 2009). "DVDisaster". Linux Format (116). United Kingdom: Future Publishing. Retrieved 2010-01-24.
- Mike Martin. "DRAFT PDS CD-DVD Media Test Summary" (PDF). Retrieved 2010-01-23.
- Physical Media Working Group (2007-03-21). "PDS CD-DVD Media Test Summary and Recommendations" (PDF). Retrieved 2010-01-23.
- Krzysztof Daszkiewicz, Arne Arnold, Reto Vogt (5 listopada 2009). "Jak archiwizować dane na lata". PC World (in Polish). Poland: IDG Poland SA. Retrieved 23 January 2010.
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External links
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