I have a Mac Pro 1,1 with 4 HD's. Drive 1: Mac OS X, Drive 2: Window 7 on Boot Camp, Drive 3: Time Machine Drive 4: Win Data Backup. I want to know the best way to add 2 HD's for Raid 1 (optical Drive install ?) and a SSD for the Boot Drive. Do I still need the TM drive? I was thinking about replacing OS X drive with 256 GB and adding 2-2.5" drives in the 2nd Optical Drive Bay for Raid 1 using OWC Multi-mount. http://eshop.macsales.com/item/OWC/MM352A52MP8/ I would like to know for any suggestions.