Mario Blaum, John L. Fan, et al.
IEEE International Symposium on Information Theory - Proceedings
We present a method to encode an array of disks in such a way that the information is protected against two disk failures. The encoding requires two redundant disks and this performance is optimal. The encoding and decoding circuits require only exclnsive-OR. operations giving them an advantage over other methods involving finite field operations, like Reed Solomon codes.