In the course of debugging something which later turned out to be a bad ethernet cable, I enabled autotune on my FreeNAS server. The next time I rebooted it, the server was completely nonfunctional. The console spammed mDNSResponder errors (EVERY TWO SECONDS: helpful) and was generally...

My FreeNAS install is up and running and powering the office - I notice that powerd and autotuning are disabled by default so presumably there is some disadvantage to having them on - why is this? Should I enable them?