So just be be 100% clear, to turn autotune on, all you need to do is start up "afsd" without any of these options: "-stat, -dcache, -daemons, -volumes, -chucksize"? That's right. You can find out what the values got auto-tuned to with "cmdebug -cache". Does auto-tuning work only for disk cache, or also with "-memcache"? I think it's disk cache only.