|Maintainer:||Paul Rubin, David MacKenzie, Stuart Kemp|
|OS:||Linux,Windows,Mac OS X|
dd, sometimes called GNU dd, is the oldest imaging tool still used. Although it is functional and requires only minimal resources to run, it lacks some of the useful features found in more modern imagers such as metadata gathering, error correction, piecewise hashing, and a user-friendly interface. dd is a command line program that uses several obscure command line arguments to control the imaging process. Because some of these flags are similar and, if confused, can destroy the source media the examiner is trying to duplicate, users should be careful when running this program. The program generates raw image files which can be read by many other programs.
Here are two common dd command lines:
dd if=/dev/hda of=mybigfile.img bs=65536 conv=noerror,sync
dd.exe if=\\.\PhysicalDrive0 of=d:\images\PhysicalDrive0.img --md5sum --verifymd5 --md5out=d:\images\PhysicalDrive0.img.md5
Use extreme care when typing the command line for this program. Reversing the if and of flags will cause the computer to erase your evidence!