[NTLUG:Discuss] Setting up a RAID

[Blue Dragon]

I have a RAID enclosure that is empty and I would like to use to setup a 
RAID and manage it on a Linux box.  I bought a 64U rack locally and the 
RAID enclosure was included.  There is nothing in it other than 2 fans.  
Also it looks like there are 2 spaces for standard ATA power supplies 
and a panel on the back to place something to allow for external cables 
to be plugged in.  On the front are 2 switches and each switch has a 
small cord attached to it.

I am thinking about using 4 or 6 SATA drives on it and maybe having half 
of the drives for the main RAID array while the other half of the drives 
will be used to backup everything if possible.  I am trying to determine 
what I will need for the case to get it running.

Also if it is possible to use half of the hard drives to backup 
everything when needed how would I do that?

Also I am using Fedora Core 8.

Here are a couple pictures of the RAID enclosure:
http://img.photobucket.com/albums/v620/uselesscrap1234/Photo_040608_001.jpg
http://img.photobucket.com/albums/v620/uselesscrap1234/Photo_040608_002.jpg