-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 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: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org