On Wed, Mar 21, 2018 at 9:50 AM, Menion <men...@gmail.com> wrote: > Hi all > I am trying to understand the status of RAID5/6 in BTRFS > I know that there are some discussion ongoing on the RFC patch > proposed by Liu bo > But it seems that everything stopped last summary. Also it mentioned > about a "separate disk for journal", does it mean that the final > implementation of RAID5/6 will require a dedicated HDD for the > journaling?

Thanks for the interest on btrfs and raid56. The patch set is to plug write hole, which is very rare in practice, tbh. The feedback is to use existing space instead of another dedicate "fast device" as the journal in order to get some extent of raid protection. I'd need some time to pick it up. With that being said, we have several data reconstruction fixes for raid56 (esp. raid6) in 4.15, I'd say please deploy btrfs with the upstream kernel or some distros which do kernel updates frequently, the most important one is 8810f7517a3b Btrfs: make raid6 rebuild retry more https://patchwork.kernel.org/patch/10091755/ AFAIK, no other data corruptions showed up. thanks, liubo -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html