How to securely export a device (HDD)?

So I have a Scientific Linux 6.3 (RHEL clone so basically the question is Redhat related) machine called "B" (with an extra "A" HDD besides the system HDD) and a notebook with SL 6.3. They are in a /24 IPv4 subnet, and can fully reach each other. **Q**: How can I export the "A" HDD device to the notebook, so that on the notebook I could see the "A" HDD as a device /HDD/? (, and locally encrypt it using LUKS - I know this last encrypting part) The important thing is that I need the connection to be secured (SSL?) so that no one can intercept the data that I encrypt on the notebook. **OR**: is it already encrypted via LUKS? (and an SSL connection between the notebook and the "B" machine would be just an overhead?) - extra: I also need that the "exporting of the device" must be routable over network. **ps.: so the main question is: does encrypted communication needed between the notebook and the "B" machine or are ALL the datas on the HDD already encrypted when leaving the notebook (even LUKS pwd too??)**