This a very old Pascal code written as a homework for the Operating Systems course given by Dr. Mohamed Said Ouerghi at ENSI as a simple filesystem reverse engineering. It's not of great use but it reminds me of some hard days nights :)

You can download the Pascal source code which is very sticky to M$ DOS. I only tried it with MS DOS and the version 6.0 of the Borland Turbo Pascal Compiler for DOS.