Mobius only sees one drive when connected via eSATA

The eSATA port on your motherboard will need to support “Port Multiplier” functionality in order for it to see multiple drives on the eSATA connection. If it does not support this, it will only see one drive.

We recommend Sonnet Tempo eSATA PCIe cards, http://www.sonnettech.com/product/computercards/index.html