I'm not quite sure what you mean here, but I can take a shot at answering your question. Eraser does have the option to erase free space from a drive, that will effectively erase everything that has been deleted without touching current (no deleted) data. Is that what you wanted? To do this you can either right-click on your drive and select 'Erase Unused Space,' or add the drive to the current task within the main Eraser executable. Hope that helps.
Nate