Hi eneles,
I'm afraid you were right - I couldn't get the drive to work even after changing the geometry and doing a bit more "fiddling".
Still, I have the backup working now as my original drive - had to change all the drive letters around but that was simple enough. So I'm pretty happy.
Tomorrow I'll format and re-partition the bad drive (without the good one switched on

) and then copy all the data back over to it. That'll keep me busy for a few days.
Thanks again for all your help.
