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by pmoriarty 2985 days ago
When I use xz for archival purposes I always use par2[1] to provide redundancy and recoverability in case of errors.

When I burn data (including xz archives) on to DVD for archival storage, I use dvdisaster[2] for the same purpose.

I've tested both by damaging archives and scratching DVDs, and these tools work great for recovery. The amount of redundancy (with a tradeoff for space) is also tuneable for both.

[1] - https://github.com/Parchive/par2cmdline

[2] - http://dvdisaster.net/