My power consumption went from 65watt idle to 29watt idle: What did I do: Move system dataset to the freenas-boot pool gui -> system -> system dataset Enable power saving deamon gui -> system -> advanced -> enable powerd Configure smart to check only spinning disk (prevent unnecessary disk spinup) gui -> storage -> view disk > smart extra option -> -n standy Check disk power state script (run commandline) !/bin/bash devlist=(ada0 ada1 ada2 ada3 ada4 ada5) timeout=30 while [ 1 ] do echo -n `date` for LINE in "${devlist[@]}"; do CM=$(camcontrol cmd $LINE -a "E5 00 00 00 00 00 00 00 00 00 00 0 0" -r - | awk '{print $10}') if [ "$CM" = "FF" ] ; then ...