I may have misunderstood the posting, I thought he was insinuating that the only reason would be circumventing copy protections, hence my comment
What!!! Me insinuate??? lol! No but I do remember how useful it was to know that. I think there may be a few white papers at Microsoft on how NTFS works... Of interest also (and probably easier to find) are pages on how the various file systems in Linux are constructed AND there still may be resources online fromthe book Designing Your Own 32 bit Operating System out and about and the chapters therein that detail this and how the OS uses this etc.Still have a copy of that book (and the CD C++ Code Disk) I think... If the wife hasn't Spring Cleaned it!