I got my Mac Pro about a week ago, a 6-core, and yesterday installed 12 gig of memory from OWC as well as a 40gig SSD, extra 1TB Caviar Black and a 2TB Caviar green. I created RAID0 using the two 1TB CB drives and installed snow leopard on that and the SSD as boot disk. Everything checked out fine. I moved my user/home folder to the raid0 as I planned on using that for mostly everything, although I installed a few apps on the ssd. I have not setup the 2tb caviar green for backing up the raid0 as of yet. About 30 minutes ago the piece of crap crashed on me for no reason. I have been using it for about 24 hours straight with not a single hiccup! Here is what I can remember using when it first started acting up: --> Firefox, installed on the SSD, got the color wheel so I forced quit it, and tried to launch it again when it kept on bouncing. --> BioChemDraw, which was where I was primarily working at the time, PARTIALLY worked (only the main screen was usable, ie I was able to select the molecule I was working with BUT the menus and toolbars were frozen). BioChemDraw was installed on the RAID0 partition, ALTHOUGH I *think* I remember seeing something called Rossette (sp?) that had to be installed be installed on the SSD... --> MarvinSketch, installed on the RAID0 drive if I remember correctly, was working fine... --> Finder was acting up; I booted up in SSD last time I started up the computer I forced-powered down my MP and rebooted, but got the error: "You are unable to log in to the user account..." even though I know my password was correct when trying to log in! I booted from the OSX install DVD and went to disk utility and found out that the 1st drive in the RAID0 (out of two obviously) was "missing" and the RAID0 was "offline"! I *think* I put the Apple harddrive in Bay 2 where the "missing" was being reported, but I don't know if that means anything. Was it maybe moving my home/user folder? It worked for ~12 hours after I did that but I never powered down or anything...would that make 1 of the RAID0 drives "missing"? What happened!? What do I do? I need to use my computer as soon as possible to complete my work and use for studying for exam on Wednesday (~24 hours)! Is my data--even though it was only 24 hours work, I spent most of the time setting everything up and getting the applications I needed working, not to mention ~5 hours of molecular modeling. What should I do? Thanks so much in advance everyone!