The thing I like about Unraid that’s dead simple, which I’m sure more technically-minded people can do with many solutions, is use drives of different sizes as long as each drive is less than the size of the parity drive(s). Since content shares are automatically distributed across drives, and those drives are different sizes, is that not very similar functionality?

I guess my question is, is the hybrid RAID solution above different only in that the array presents as a single drive to the user, rather than a single (multi-drive-apportioned) share?