dvdisaster provides additional ECC protection for optical media
It can loosely be compared to par2 files, but the protection works at the iso level instead of working at the file level. This way, even if metadata from the optical media filesystem is damaged, dvdisaster can still work flawlessly.
This version of dvdisaster supports the following platforms: Linux, FreeBSD, NetBSD on x86, PowerPC, Sparc, and Windows.
Three protection codecs are supported, they're quickly detailed below. Please see the documentation/manual.pdf for more information about these, and everything else.
The codecs
RS01
RS01 creates error correction files which are stored separately from the image they belong to. The artefact is an ecc file, which must be stored on another media than the one we're protecting.
RS02
RS02 creates error correction data which is added to the medium to protect, we call this augmenting the image we're protecting. Damaged sectors in the error correction information reduce the data recovering capacity, but do not make recovery impossible - a second medium for keeping or protecting the error correction information is not required.
RS03
RS03 is a further development of RS01 and RS02. It can create both error correction files and augmented images, with the following added features:
- RS03 can distribute work over multiple processor cores and is therefore much faster than RS01/RS02 on modern hardware.
- RS03 error correction files are - contrary to RS01 - robust against damage. This should not delude you into careless handling of your error correction files though - the disadvan- tages of reading at the filesystem level are still valid.
- RS03 augmented images do not require so-called master blocks holding important in- formation. This makes RS03 a bit more robust, but also more restrictive: The augmented image must completely fill the medium now while the size of augmented images can be freely chosen in RS02. The changes for parallel computation and higher robustness make RS03 a bit less space efficient, e.g. RS03 error correction data has slighly less error correction capacity than its RS01/RS02 counterparts on images with equal size.
Unofficial version
The last upstream version is dated 2017, and the official website is down. The original README has been left untouched in this repository. This version is built on top of the latest upstream version, with the following notable enhancements:
- Most Debian patches have been applied (The Debian version source code can be found here)
- Windows build added back (was dropped upstream a few versions before the last one)
- A Linux CLI-only version can now be compiled, without depending on gtk
- Regression tests confirmed working on Linux64 (normal and CLI-only), Windows32 and Windows64
- Added pre-defined sizes for BD-R Triple Layer (100GB), BD-R Quadruple Layer (128GB)
Screenshots
(todo)