What happens when all btrfs LVs are unmounted, and you lvchange -an the LVs (the pair) you do not want mounted; and then btrfs dev scan; and then mount one of the devices? It should only find the matching LV because the others are deactivated. I know this isn't ideal, but it's better than corruption.
Chris Murphy -- 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
