Thanks everyone for pointing me in the right direction, I didn't know about configuration data in ME.
I did a quick comparison of the ICC profiles in the two ME images and found multiple differences.
FCIM/BTM Specific ICC Registers: ============================= Clock Source Select SRC Source Select PLL Reference Clock Select Divider Enable
ICC Registers: ============================= Flex Clock Source Select Output Clock Enable PI12BiasParms
I need to do more research to find out what all this means, but in theory, if I update the new ME with same values as the old one, then I should have a working SATA disk?
Regards, Mogens Jensen