I have a pioneer 111d drive that is in a external enclosure,that I don't use anymore. I would like to put it in my mac pro. How much current do the drives draw when in idle or stand by mode. The only reason I ask. Is because, I have no need for a mac pro with two drives, as of now. I would be adding the second drive just because I can. I would pass on this if I new it was just sitting their wasting energy.