Windows: Format and write zeros to every sector of the drive.
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format <Driveletter> /fs:NTFS /p:0 |
Windows: Format and write zeros to every sector of the drive. After the first pass write randome numbers.
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format <Driveletter> /fs:NTFS /p:2 |
Windows: Fill free space.
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cipher /w:<Driveletter>[<span class="gmw_">:\foldername]</span> |
Unix: Fill free space.
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dd if=/dev/zero of=/path/to/drive/zeros.file status=progress |
Unix: Fill free space on FAT32 drive (4GB limit per file).
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cat /dev/zero | split -b 2000m - zero -d --additional-suffix=.file |