hi , I think it isn't complicated for raid5 to add bad block remap. "bad block remap" is means that if a bio is written error, we not fauty the disk, and try to write this bio to other place which alloced for bad block remap. i dont know why MD/raid5 add this function ? THS -- 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