Got it sorted somehow - this has been irritating me for four months now.
In my frustration i went into system devices and uninstalled the following
system management bios driver
intel 8202 firmware hub device
plug and play software device enumerator
and possibly ACPI embedded controller
rebooted with the drive firmly in place and voila. Four months of trying everything on the web I could find.
Coincidence?? maybe. I don't care its up and running again.
Thanks for your reply though, I was thinking along those lines. Luckily its not the case