Ok, my Vertex drive caused my (Mac) system to lock up. Thought nothing of it. I have a Mac Pro with the 250GB Vertex on one drive slot 1. And a back up of this Vertex SSD (Carbon Copy Clone of it) on another HD on another slot. I rebooted. but didn't realize I was working on my HD back-up version till I looked at my desktop and realize the SSD drive wasn't mounted! I opened Disk Utility and it did the scan - nothing! I shutdown the machine. Took out the Vertex and re-seated it. Took out the back up HD. Rebooted the system, and it came up with a blank folder with a question mark on it! Shutdown and reseated the Vertex in another slot. Reboot and still no luck. LUCKY I BACKED UP the day before, so very few files lost!. If I didn't have this back up HD, I'd be totally screwed out of about 2 weeks work! What should I do next? Disk Utility isn't even seeing it so I can't even try to reformat the SSD. Any suggestions/ideas?