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The Wednesday 2007-02-21 at 00:40 -0000, David Bolt wrote: ... > And for the last few years, just to make sure my backups are going to be > recoverable, I have a quite decent[2] backup system: > > 1, use tar to create an archive; > 2, split the archive into 100MB pieces; > 3, use par2 to create parity files for recovery in case of a media > failure, using a 1MB block-size and 535 recover blocks; > 4, burn about 3.5GB of data, plus the 530MB of par2 files to DVD; > 5, make a duplicate of the DVD. What is par2? I have a guess, looking at sourceforge, that is somekind of parity file standard for data recovery, but I don't see how to generate them. What are you using, where did you get it from? I have found parchive... (<http://en.wikipedia.org/wiki/Par2>) > Results are that if there is a failure of the disc, I can use dd to > salvage the readable files, recreate the broken ones and burn a fresh > couple of copies. The only time this would fail is if both copies of the > DVD, or more than 530MB of data on both discs, were unreadable. This phrase in the wikipedia is interesting: | Parchive files can be used for other purposes than Usenet transmission. | | * A patch is available for the DAR backup program SaraB here that | uses PAR or PAR2 to ensure robust backups. Now I wonder if the "dar" we have in the distro has that implemented [...] it seems it does. I'll have to investigate. - -- Cheers, Carlos E. R. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Made with pgp4pine 1.76 iD8DBQFF3tVjtTMYHG2NR9URAoCDAKCYvP/7bFcwaKWfSpELGNXFM/0GoACeNh54 T1e7EEXk4qyBiUSA12nhtFM= =RSim -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
