Mid 2012 rMBP + LaCie Minimus external drive. I've used this drive with no issues for 2 years (it is now 3 weeks out of warranty). Starting this morning it is invisible to the mac. I unmounted and disconnected the drive last night. Did my normal routine this morning and it is nowhere to be found. The drive appears to be acting normally. When I connect it to the computer it starts up, the blue led remains lit, and I can hear the disc spinning. Just as always. However, it does not appear in finder or disc utility. The only place I can see it is when I run a system report. I've looked everywhere for a solution. I've also unplugged it and let it sit, and shut down the mac with it connected. Nothing. Please help! Any suggestions are appreciated.