These sorts of codes are not really the thing you want for RAID-N. They work best with coding groups of thousands of packets or more.
For adding redundant blocks to a read-mostly/only file (e.g. to correct for sector errors) they could be useful indeed. as that's a case where you might have a few dozen correction packets protecting millions. I'd really like to see some FS develop support for file protection because on SSDs I'm seeing a LOT more random sector failures that disk failures.
RS codes are optimal for erasures so you really only want to use something else where there are so many packets in the group that RS code performance would be poor... or where a rateless code would be useful.
For adding redundant blocks to a read-mostly/only file (e.g. to correct for sector errors) they could be useful indeed. as that's a case where you might have a few dozen correction packets protecting millions. I'd really like to see some FS develop support for file protection because on SSDs I'm seeing a LOT more random sector failures that disk failures.
RS codes are optimal for erasures so you really only want to use something else where there are so many packets in the group that RS code performance would be poor... or where a rateless code would be useful.