So, I can't remember if this happened before Mavericks, but my 4TB RAID LaCie Thunderbolt keeps disconnecting, especially when my laptop goes to sleep. I remember seeing an update in the app store that said it fixed this issue. Obviously it didn't work. And sometimes it gets disconnected when I'm using it? Is there any way I can check if this is the external, cable, computer, etc? Should I just go to the apple store, because every time I go and ask about my drive, they say they don't do troubleshooting with third party items. Also, as a side note, my small HDD external USB drive never has a problem and always stays connected. Please, any help would be necessary because I have a lot of data on that drive and I don't want it to get corrupted.