It's a similar idea but they distribute the copies between machines, not just across disks in the same machine. https://www.backblaze.com/blog/reed-solomon/ htt

It's a similar idea but they distribute the copies between machines, not just across disks in the same machine. https://www.backblaze.com/blog/reed-solomon/ https://www.backblaze.com/blog/reed-solomon/ So the drives in each box are not in a RAID configuration.