How is El Capitan treating 3,1 machines? I have a core storage pool, SSD (samsung 840) to a Hitachi 2TB for the OS. (are the tools available for working with multiple disks in core storage yet?) Utilizing a Apricorn Velocity Solo VEL-SOLO-X2 Can I simply upgrade OK, or do I have to do a full reinstall? This is for a MacPro 3.1 early 2008 currently running Yosemite. Any issues or problems to read up on first?