One of those Unix tools that would deserve to be better known is dcfldd (http://dcfldd.sourceforge.net/ http://dcfldd.sourceforge.net/). It is basically dd with

One of those Unix tools that would deserve to be better known is dcfldd (http://dcfldd.sourceforge.net/ http://dcfldd.sourceforge.net/). It is basically dd with extra powers including on-the-fly hashing, progression, multiple outputs...