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![](https://lemmy.dbzer0.com/pictrs/image/a18b0c69-23c9-4b2a-b8e0-3aca0172390d.png)
There is btrfs - a linux filesystem. It keeps hashes for blocks to prevent data rot. And you can configure it into a raid that duplicates data across drives but doesn’t require the exact same drives. You can just group any old drives together to create one large volume where everything is duplicated. At least that is how I understand this, I’m new to this too.
Most useful application so far seems to have been to predict protein folding. Have to check up on that, it should allow to cure all sorts of bad things.