Write zeros to a hard drive – Wipe/Erase unused or free space

Windows: Format and write zeros to every sector of the drive.

Windows: Format and write zeros to every sector of the drive. After the first pass write randome numbers.

Windows: Fill free space.

Unix: Fill free space.

Unix: Fill free space on FAT32 drive (4GB limit per file).

forfiles – run commands for each file in a location

forfiles allows command line users to run commands for each file in a location. Some of the tasks that the forfiles command can be used to do are deleting old files and renaming files. It a native command in Vista or newer. For WinXP you can find it in the Recource Kit.

Example: