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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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[–] Cyber@feddit.uk 5 points 3 months ago (1 children)

What's your recovery needs?

It's ok to take 6 months to backup to a cloud provider, but do you need all your data to be recovered in a short period of time? If so, cloud isn't the solution, you'd need a duplicate set of drives nearby (but not close enough for the same flood, fire, etc.

But, if you're ok waiting for the data to download again (and check the storage provider costs for that specific scenario), then your main factor is how much data changes after that initial 1st upload.

[–] NekoKoneko@lemmy.world 1 points 3 months ago (1 children)

Sorry. Shortly after posting this and the initial QA I left for a trip.

I could definitely wait those time periods for a first backup and a restore, since I assume it'll be a once in 10 year at worst situation. Data changes after the first upload should be show enough to keep up.

[–] Cyber@feddit.uk 2 points 3 months ago (1 children)

No worries, I don't have a time limit on responses 😉

But... I took somethong like ~3 days to get an initial baxkup done.

Then ~3 years later I was at a different provider doing the same thing.

What I did do differently was to split the data into different backup pools (ie photos, music, work, etc) rather than 1 monolithic pool... that'll make a difference.

[–] NekoKoneko@lemmy.world 2 points 3 months ago

That does make sense - also matches how I have currently sperated files so it's a valuable idea. Thanks!