I for one just leave the beast on, I understand that spin-ups and downs are the main thing that wreck harddrives (and my beast has a lot.)
For me, power outages were/are a big issue, lost one of the HDD recently then, did not want to risk the new one.
I for one just leave the beast on, I understand that spin-ups and downs are the main thing that wreck harddrives (and my beast has a lot.)