this post was submitted on 26 Feb 2026
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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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[–] worhui@lemmy.world 10 points 1 day ago* (last edited 16 hours ago)

Lto tape. But I only have 15tb

It quickly becomes cost effective when you actually need the data to be safe. Far easier to have off site backups. I have never had a problem , but I like to have offline backup. Most of the time my data is static. So I am only backing up projects files ans changes for the most part.

If you have 40+ tb of dynamic data I can’t help there.

Edit: I buy used drives that are usually 2 generations old, so I got lto-5 drives when lto 7 was new. The used drives may be less reliable but used drives can be 1/10th the price of the newest ones.