Just established a RAID1 with two 3TB WD RED drives in the MAC Pro (2012 model). I am trying to copy a 1.65TB Aperture Library from a 2TB WD Black to the Red(s). Says 21 days, and I believe it as I check the progress (3.35GB in just over 2 hours.....My CF cards transfer faster!!!). What could be slowing this down? 110GB of music transferred pretty quickly just the other day in testing the RAID...Thanks in advance for any comments/suggestions.