7 times is the DoD standard, 35 times is considered "almost impossible to recover from" I've used eraser to do the 35 time thing on my drive, takes 18+ hours or so for the entire thing (23gb or so of ...
You will find the complete list of MS-DOS commands below. However, MS-DOS commands are not the same as Windows command line commands or Powershell commands. MS-DOS (Microsoft Disk Operating System) is ...