That's solved it. I'd flashed the bios in an attempt to solve my earlier the esata problems. When I was putting in bios the settings I had enabled the onboard SATA controller, now it's disabled I'm back to super fast boots
I thought the enabling onboard controller would be neccessary to operate the hard drives. No idea what that does then! I tend to put settings in to bios and just hope I've done the right thing. Mayby I should read up!