Is compression enabled? That's the most likely reason, filefrag gives unreliable results when compression is enabled.
https://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg26127.html 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
