Harddisk Drives on Linux

Okay, here's my problem. (I posted this elsewhere but I just reposted this because I cleaned up the description of the problem and added more information more concisely.) I have a computer with 2 Raid0 Harddrives and 1 non-raided harddrives. All my harddrives are SATA. I'm a total newbie to Linux, but I installed the Fedora Operating system on this system which I had just built. (I would have had no problems with Windows this is just me trying to install and manage an operating system I have never used.) Anyway, when I was installing I chose the option which said Boot from my 1 non-raided Harddrive which was what I wanted. I want my opperating system on 1 drive and my data to be read from my Raid0 harddrives. I have a ton of data to deal with and I want the opperating system physically separate from the data. Anyway, the computer installed and everything with no problems. But when I get in there I see an Icon "Computer" I can go into that and I see "File System" inside there there are a ton of folders, Most of them have a free space size that would indicated they are located on the raid0 harddrives set. But I can't find like a "Directory" or anything where I can look and see Yeah! I got 2 logical drives one is the raided set and the other the single. So I really don't know if I'm booting off only my raided drives and nothing else is reading. How can I look at my harddrives? I mean in windows there was "My Computer" and then the various harddrives. That was cool!