Thanks, excellent article. On Thu, Dec 15, 2011 at 12:27 PM, NeilBrown <neilb@xxxxxxx> wrote: > On Thu, 15 Dec 2011 11:15:42 +0800 Tao Guo <glorioustao@xxxxxxxxx> wrote: > >> Hi all, >> >> Today I checked the raid6's scribbling code, and I think there may be >> some improvements to handle bad sectors: > > I think the common term is "scrubbing" rather than "scribbling". > >> >> If we have one bad sector(with corrupted data) in the data block, >> scribbling thread will find parity mismatch and will try to >> recompute&rewrite P&Q, but that will cause final data loss. >> Since we have P & Q, actually we can try to use them and find out the >> wrong data block then fix it. >> >> But the algorithm to find the bad data block seems not >> straightforward... Does anyone know if there is any paper discussed >> this issue before? >> >> Update: I just found there is one talk about this in FAST08: >> http://www.usenix.org/events/fast08/tech/krioukov.html. >> But that approach will add checksums.etc. For bare-bones raid6, does >> any guru have any better ideas? > > http://neil.brown.name/blog/20100211050355 > > NeilBrown -- 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
