I just purchased the NexStar MX External Hard Drive RAID Enclosure (NST-400MX-S3R).
I have two Western Digital 4TB SATA III drives in it with a RAID 1 configuration.
The device shows as one drive and I was able to initialize and partion with Windows 7.
However, whenever I copy a decent volume of data to the drive (> a few GB) it disappears from Windows partway through. The drive reappears shortly after.
What could be causing this?