Add hardware raid to an existing installation

[xtraspecialj]

So I already have a 300 GB SATA drive with Ubuntu 8.04 installed on it. It is currently running off my mobo's onboard SATA 1.0 Raid Controller. I recently purchased a SATA 2.0 Raid PCI controller card that I will be putting in the computer and 2 new 750 GB Western Digital Caviar Green Hard drives. I wish to add the two drives in a Raid 1 configuration to store all my Pictures, Files, and Movies on. Every instruction and tutorial I can find on setting up Raid on Linux assumes you are performing a fresh install on Linux and gives no tips or instructions for current installations. ( I have found some explanations for doing it with software raid) I already have Ubuntu installed and do not wish to have to reinstall it. I want to leave my installation on the 300 GB drive and just add in the 2 750GB drives for storage. I feel like I should just be able to add the card, install the drivers, mount the drives and that is it, but rarely are things that simple I have found. Any tips or links?

[cariboo]

If the raid card is supported, you should just be able to plug it in boot the computer, do the setup in the raid card bios, then setup your array when you have booted to the desktop.

[xtraspecialj]

Awesome, thanks. I will find out today as I finally have a day off to mess with it. Like I said, I figured that was all I had to do, just wanted to make sure.