Hi Piergiorgio, Checking better I found that for PAR3 it was also evaluated a Cauchy matrix, but they preferred to use a RS with FFT in GF(2^16 +1). http://sourceforge.net/mailarchive/forum.php?forum_name=parchive-devel&max_rows=25&style=nested&viewmonth=201006 Note that using a Cauchy matrix for a MDS is something well known. What I did is just to adapt a Cauchy matrix to be compatible with the present Linux kernel implementation. I think it has a value only for Linux or compatible implementations. Ciao, Andrea On Sat, Nov 23, 2013 at 11:10 PM, Piergiorgio Sartor <piergiorgio.sartor@xxxxxxxx> wrote: > Hi Andrea, > > On Sat, Nov 23, 2013 at 08:55:08AM +0100, Andrea Mazzoleni wrote: >> 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/ > > you did a pretty damn good research work! > > Maybe you should consider to contact them too. > I'm not sure if your approach can be extended > to GF(2^16), I guess yes, in that case they > might be interested too. > > bye, > > -- > > piergiorgio -- 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
