Hi Piergiorgio, > How about par2? How does this work? I checked the matrix they use, and sometimes it contains some singular square submatrix. It seems that in GF(2^16) these cases are just less common. Maybe they were just unnoticed. Anyway, this seems to be an already known problem for PAR2, with an hypothetical PAR3 fixing it: http://sourceforge.net/p/parchive/discussion/96282/thread/d3c6597b/ Ciao, Andrea -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html