I just bought a 2 TB portable external HDD and I've got two partitions on it. I've been getting notifications from OS X that I should eject my disk via Finder before removing the disk but I'm not removing the disk at all, it's been plugged in, stationary on my desk since I got it. Does this sound like a software or hardware issue? I'm not sure what the problem could be. Both connections are tight and I'm not bumping the drive or anything.