I have a strange problem with my GEMINI. For some time, let's say in the middle of the shooting day, it suddenly stops recognizing the MINI-MAG drive and reports the need to format it. After using RED Undead, it manages to recover the files, but it's starting to worry me. I am using 4 MINI-MAG drives (480 GB), and this problem occurred on two of them during last month. What could be causing this?