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Is it safe to remove a single drive ZFS?


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I have a 3 drive Z1 setup. To prevent 2 of them fail at the same time, I got another drive for cold backup. I formatted it ZFS because TrueNAS likes it.

That drive is just for periodically and back up important stuff, so it's mostly offline...and now the OS is freaking out "BRO YOUR POOL "BACKUP" IS OFFLINE NOOOO"

Is it safe to just remove the pool from the OS? Like, if I plug it in later, can I still parse the content?

If not, what data should I grab beforehand? I can go TrueNAS UI if necessary.

Thanks for reading.

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