The Hardwipe program isn't developed to delete any data. But it creates large dummy files that overcome the location from your hard drive that were previously packed with data. If you used the program on your local drive, there is no way to recover your data. However, depending on the option that you used, Wipe Logical Volume or Clean Free Space, you might need to format your drive in order to access it. According to your description of the problem, this is the case which requires a format. There is no other way to access your D:\ drive. For additional information, check the product's official website.