I posted this elsewhere on the forum, but since I was running Raid 5 on my Quad when the machine went down, and it was making a slight "read" noise but not booting, I simply removed the drives, one at a time, and attempted to reboot the machine. (I had used TFTP to get to the EM with no success. I had used this link to try to force update to no success.) My bad drive was on Disk #2 and when I removed it and rebooted the noise disappeared and the machine came back online. I was able to retrieve all of my data. I now just need to reformat or get a new disk to replace the damages one. Hope this helps.