I ran the toolbox from OCZ to update the firmware and my drive didn't appear in the list! So I opened a ticket with OCZ whom then asked if I was in "AHCI mode" which I was. He then asked if I was running the intel rapid storage technology drivers. Which I wasn't sure, but I don't think so.
I noticed, in bios, that my ssd didn't appear in the list of sata devices connected. Even though I can boot off it, and read/write data to it, it was "unconfigured" .
I am now being asked to return my vertex 2 for a replacement. f'ing brilliant.