I have a RAID 0 setup with two 36gb SATA WD Raptors. It worked quite well for 2.5 years until the inevitibale happened a few nights ago after rebooting, I got a SMART error on one of the drives telling me to backup and replace it. I ran the diagnostic tool provided by Western Digital and it gave me a "drive not ready" error. Below is the full description of the error from WD. "The drive did not properly respond to test commands. This may be due to a defect with the drive or the drive may not have responded properly due to a bad connection. Check cabling and retest. Replace the drive if the error repeats." I have no idea what triggered this failure, my connections are solid and the other drive in my RAID is working error free. I have most of my important things already backed up but I wanted to know if someone has an idea of how to get the drive to work for a few minutes so I can retrieve a few more critical files before I send the drive in for a replacement. Also if anyone has a suggestion on some more diagnostic software to try out, it would be much appreciated.