Well, I stand corrected (and I don't have much knowledge to argue about this).
Re-reading, I see that in the storage world "simple" correction systems don't tend to be classified as erasure coding.
Were I say "simple", I think I'd say any correction system that's not parametrizable, as in "let's do a 17+3 in this ordinary dataset and 4+2 in this one that's very important"
About RAID 1, technically probably it is... although bit very efficient :D
Re-reading, I see that in the storage world "simple" correction systems don't tend to be classified as erasure coding.
Were I say "simple", I think I'd say any correction system that's not parametrizable, as in "let's do a 17+3 in this ordinary dataset and 4+2 in this one that's very important"
About RAID 1, technically probably it is... although bit very efficient :D