I am looking for a Software that add efficient redundancy to perform reliable backup files (those are also compressed) the idea :

• 1 Gb of data
• 500 Mb of compressed file
• 650 Mb of protected compressed files (fit on one CD)

If there is not tool like that i will provide a script shell

apropos redundancy

ras /  redundant archive system : Adds redundancy files to archives for data recovery.

mkisofs -R -J ./ | cdrecord -
mkisofs -J  -D -joliet-long  -force -o /tmp/backup.iso $HOME

http://www.muempf.de/cdbackup.html

tar cvz - $HOME | cdbackup -d /dev/scd0 -r 2,0 -a "$HOME backup"
cdrestore -d /dev/scd0 -t 1 | tar -xv

rsync -az -e ssh --delete --exclude='*/*tmp*/*' $HOME server:$DESTDIR

• http://slencyclopedia.berlios.de/backup.html
• http://www.linuxboxen.dk/show_software.php?ttype=-1&dat_table=Backup
• http://www.technology-and-computers.com/Computers/Software/Backup/
• http://dar.linux.free.fr/

• http://slashdot.org/articles/01/03/31/0516216.shtml
• https://web.archive.org/web/20090401000000*/http://www.linuxdevices.com/news/NS3386655708.html