Just curious.. but I am wondering if you took the harddrive that isn't listed on the RAID, and set it as a SLAVE drive using the cable & jumper, if you wouldn't be able to mount it, back up the information, then format & do another RAID config? I'm not entirely sure if this is possible or not.. but it was just an idea. Worth giving it a shot. If it does work, you won't lose your data. If not, you've wasted 15mins. =/ lol.