I Have just installed FC7, ("upgrade" from windows 2003 server) and am trying to get our raid array to be recognized. lspci gives me the following information on the controller
01:0a.0 RAID bus controller: Silicon Image, Inc. SiI 3112 [SATALink/SATARaid] Serial ATA Controller (rev 02)
I have read about this being fake raid etc, and ive read that the linux support for software raid is much better, i dont know if this is true, however, i need the data of that array and i cannot get fedora to recognize the two drives as a single one, dmraid -b shows me the following
/dev/sda: 156355584 total, "664243752569"
/dev/sdb: 488397168 total, "WD-WMAEP2871453"
/dev/sdc: 488397168 total, "WD-WMAEP2871304"

i am using an 80 gb IDE drive for fedora.

it appears that fedora sees the drives, how can i make them mountable as a single drive, without destroying any data.

I apologize for any of my ignorance in advance, thank you!

The Silicon Image 3112 is a "fake" RAID device, not actually a true "hardware" RAID device.
As such, under linux you will see the individual drives connected to this controller instead of the array, as the 3112 is heavily dependent on proprietary software within a Windows OS.

I would recommend reinstalling Windows/getting the 3112 and its drives back to a working state, copying the data to another machine/network share, and then creating a _new_ linux software-based RAID array on these drives within Fedora.

To create a software RAID array in linux the best tool available is "mdadm" . You also can create and initialize the array during the graphical installation of FC7, I think, which probably would be a bit easier. Essentially, you will need to create identical partitions on each of your two 400GB WD drives, set them as type "linux software RAID" and then create the drives, such as /dev/md0 for the first, /dev/md1 for the second etc.
With two drives you're going to want a mirror/RAID1, I imagine.

Try googling for mdadm and get a little familiar with the terminology and its use...

The 3112 can be used to host the two drives, so there's no need to throw it out.

Thanks for your reply! i have started to do this already, takes time to keep moving 500gb back and fourth. to different devices. this seems like the only solution after doing so much reading.

Unfortunately so. However, once you've recreated your array with linux software RAID, you actually can move the drives to another physical computer and import the config into a running linux system installed on it (tricky, but works). Much more portable than some solutions!

Good luck, and welcome to linux!