Good thing you are cruising along.
I made this page documenting my weeks of fun making it work.Software raid and partitions
I learned that checking up on my motherboard manufactureres website was important to see if any issues with linux. I did find an issue and had to disable something in the bios. This was a significant development and one worth checking out. This had to do with my sata onboard card...
I went software raid too and I added all the commands you will need to check on the mirroring, cat /proc/mdstat , how to add a new drive to the array, how to set up a spare, how to re-add a drive you took out, how to make them all bootable, how to LVM partition, and a lot of other stuff.
I had such a hard time trying to get all this info...a real nightmare, that I posted it so others do not have to waste all their time figuring it out.
Even went so far as to tell you to buy drives from different manfacturing batches, so in case a batch is bad, all your drives do not fail, just the one from that batch.
I hope it helps and if you have anything to add to it, shoot me a mail and I will add it...this is for everyone, so the more info the better.