To my knowledge, NDD stands for Norton Disk Doctor
and is part of the Norton System Utilities
marketed by Symantec. This, I believe, is an old product and has been replaced by Norton System Works
In effect the function of the NDD is similar to Scandisk of Windows.
Alternately, Samsung/TriGem has their own set of Utilities, one of which is Disk Manager
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards. Thank you for using FixYa.