Assuming you used HDDHackr, then use your UNDO.BIN file to restore your drive to its original state.
If you’ve lost your UNDO.BIN, then don’t be tempted to use one from another drive. You will probably brick your drive if you do. Instead there are ways to recreate the UNDO.BIN from information in the reserved System Area on the drive, but you will need to do a bit of work in DOS. I can help you with this.
