Adds redundancy files to archives for data recovery.
Ras is a program that adds m extra files to a set of n files, such
that the contents of the n original files can be regenerated from any
n of the n+m original files and extra files. Normally, these extra
files will all be 6 bytes larger then the largest of the original
files, but ras has a mode in which the extra files are exactly the
same size as the original files.
Ras was originally intended for transporting a large file split over
several floppy disks in a manner resilient to the corruption of a few
of the disks, and a pair of example shell scripts to do this (rassplit
and rasmerge) is included in the distribution.
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