Hi, I just clean installed 10.8 on a new SSD in my Mac Pro 3,1 and was planning on leaving my old HD for data. This HD still has 10.6.8 installed on it. However, even though I can still see the drive in system profiler, it will not allow me to mount the drive and access the files. How do I access my old files without migrating them over to my new SSD, and just use my old boot drive as a slave? Id like to leave 10.6.8 on it if I can. Thanks!