I have a Mac Pro and currently have two drives in it, a system drive that's using as the startup disc and for most of my use. The 2nd drive is more like a server drive which is used on that system but also shared with all computers on my home network. i use it for things like clipart, backups of itunes from the laptops, media files, etc. I just installed a 3rd hard drive and have been planning to set it up as a Time Machine drive for my Mac Pro. I have several questions though. I assume when I do this it will just work as a Time Machine drive for my main system/startup drive, correct? Is there a way I can use Time Machine for the 2nd drive in my system? In a sense setting up two Time Machine backups, one from the main drive to this new backup drive and the 2nd from the server drive to a 4th drive I can add in the future? If the 2nd question is a No, is there a way I can set it up so that Time Machine simply backs up both the main drive and that 2nd, server drive, to the Time Machine drive? I really prefer not to use this option since both drives are 1TB and the hard drive I have just gotten as the time machine drive is 1.5TB. I think that should be okay for my main drive since it is only 30% used or so but with backing both onto it I don't think I have enough space to do it well.