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Disk drives suck less than they did a couple of years ago. Which is nice

W.S.Gosset Bronze badge

> Mirroring across identical drives (from the same batch) seems like a recipe for trouble.

Yup. I've seen a couple of RAID5 setups collapse for precisely this reason. "Go to backup."

> RAID10

Suggest you look at ZFS rather than RAID. Step-change in what you can do, and serious step-change in reliability, at the bit-level.

https://arstechnica.com/information-technology/2014/01/bitrot-and-atomic-cows-inside-next-gen-filesystems/

Check out the 1-bit error examples in the photos there. (I lost 99% of 20yrs' photos to these errors, coming back from UK to Aus).

But note the ability to, eg: decide to upgrade OS, do Snapshot, Upgrade, discover nightmare, do RevertToSnapshot, and continue as-was In Under A Second without faff. (vastly better lowlevel approach than LVM, btw)

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