Hi Mike
Thanks for the input. Yes, both cables are thunderbolt 😉
Tried different ports on the Lacie – yields the same issue; a direct connection to the BM device = signal, going through the Lacie to the BM device = no signal (same setup in software) but the system can recognise there is a device attached. It’s bizarre.
My setup : Macbook air 10.8.2 2011 model
Thanks