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How do you effectively backup your high capacity (20+ TB) local NAS? (lemmy.world)

submitted 3 months ago* (last edited 3 months ago) by NekoKoneko@lemmy.world to c/selfhosted@lemmy.world

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I have a 56 TB local Unraid NAS that is parity protected against single drive failure, and while I think a single drive failing and being parity recovered covers data loss 95% of the time, I'm always concerned about two drives failing or a site-/system-wide disaster that takes out the whole NAS.

For other larger local hosters who are smarter and more prepared, what do you do? Do you sync it off site? How do you deal with cost and bandwidth needs if so? What other backup strategies do you use?

(Sorry if this standard scenario has been discussed - searching didn't turn up anything.)

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[–] NekoKoneko@lemmy.world 4 points 3 months ago

For me, I have a bad memory. I might remember a childhood movie (a nickname I give to special Linux ISOs) that I hadn't even thought of for 10 years and track down a copy, sometimes excavating obscure sources, and that may be hours of one-time inspiration and work repeated many times over. Having a complete list is a good helper, but a full backup of course is best.