Win 3.11 is ancient, as you know, and newer drives probably have some issues to consider. These include a new sector size, and most likely the drives are too large for DOS and Win 3.11.

If you can find a compatible drive, standard drive cloning software should work.

An alternative, provided you do not need the specific hardware that Win 3.11 is now running on:

http://www.maximumpc.com/article/how..._31_virtual_pc