The patches which enable reading from raid5 without going through the stripe cache have a bug which causes corruption when reading from a raid6. It might be appropriate to put out a hotfix for rc5-mm1 which reverts md-enable-bypassing-cache-for-reads.patch The follow 4 patches fix this bug and a few other bugs I found while re-reviewing and re-testing this code. There are actually about 9 separate bugs here, but I grouped some of them to avoid having lots of tiny patches. NeilBrown [PATCH 001 of 4] md: Fix innocuous bug in raid6 stripe_to_pdidx [PATCH 002 of 4] md: Fix newly introduced read-corruption with raid6. [PATCH 003 of 4] md: Misc fixes for aligned-read handling. [PATCH 004 of 4] md: Fix a couple more bugs in raid5/6 aligned reads - 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