btrfs-map-logical is the tool that will convert logical to physical and also give what device it's on; but the device notation is copy 1 and copy 2, so you have to infer what device that is, it's not explicit.
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
