I just purchased a LaCie P'9231, which is advertised as an Apple Store Exclusive. I've been having problems with it and Time Machine and I'm starting to think its due to the Eco Mode feature. I'd rather have the HD on all the time and turn "Eco Mode" completely off and I've unchecked the "Put the Hard Disk to Sleep..." option in Energy Saver. Still I'm looking at it right in front of me in Eco Mode (so it didn't help). Any drivers to instal or are others experienceing this problem? Thank you so much!!!!
Just to close this question, I ended up returning the LaCie after contacting customer support. No help at all. Ended up purchasing a G-Drive 750 GB and have had no problems with it since September 2011. Never purchasing a LaCie drive again.