I’ve bought the HGST drives from ebay. Now that I have them with me, I’m having 2nd thoughts to deploy them due to they may suck more power than my existing SATA drives. Though my SATA drives are pretty old, not sure which sucks more power. I am using Unraid, and there is no SAS powerdown for now with Unraid, it will remain spinning. Can’t decide whether to put them in yet or not.