The fact is that these lacies are dodgy!!!
The internet is full of people who have had problems with them – mostly with that ole clicking sound followed by the drive dismounting itself (and all fcp media going off line) while it thinks about what it should do next, then spinning back up when the two drives inside decide they’ll communicate with each other. – This seems to get worse untill one day the drive wont spin up at all or the power supply seems to pack up.
The company I’m working for have just bought a different drive for me to play with tomorrow. I’m sure it wont be a lacie!!!!