The zeroer utility can be used to wipe empty space (unallocated disk space around files) on a hard disk. zeroer doesn't wipe existing files on a partition. It overwrites the unallocated disk space around existing files, which means that deleted files cannot be recovered after processing a certain partition with zeroer. The utility's principle consists in writing huge zero-padded memory blocks to a file. To a certain extent, this works similar to dd, but zeroer dynamically reduces the blockwriter's buffer size when the filesystem is going to be full. zeroer's principle is quite simple and there is no guarantee, that zeroer works reliably on every file system, since zeroer doesn't know the way a file system works exactly. zeroer has been multi-pass tested on UFS, FAT and NTFS and the test's results showed, that zeroer operates quite reliably on these file systems. Warning: The current version of zeroer (version 0.1) doesn't remove file or directory meta data like file and directory dates, modes, names, sizes,. Only a file's content is overwritten. Meta data scrambling will be implemented in a future release.
Homepage: http://critical.ch/zeroer/
Download: http://critical.ch/zeroer/zeroer-0.1.tar.gz
Author: David Schneider (davidschneiderATgmxDOTch)
License: GNU General Public License (GNU GPL)
