well data care, this is my impression, let me told u my story case, before i worked on Data Recovery , i worked like TS certified, MCP, A+ , etc , and like u on first only did an high level Data Recovery , using software, but that not was only my goal, im always wish to know, whats happening really, on the hdd, like a doctor, on my country at this year, and on this years happens too, many people think, if the hdd cannot be formmatted or not detected by BIOS , the hdd its died, but im not always sure about that, , i feel the impression on that moment where´s the HDD doesnt show any "signal" should be , sending some "sigal" about what´s happening inside, but i need to be patient, because this is not a easy field, was need to left some years, i found an course about data recovery, logical level , where they show a little about how works the File System, Master Boord, Partition Table, and how to recover it manually ,on that course we understand an little about the working of the File System on that time FAT12,16,32,NTFS only the MBR Code, Partition table, code, Boot sector, . at that time im was only an student wich finalized the high school, but my goal, was know more , so at night´s i was searching on internet more about this, ,after return of that course, was an course for Technical support, no data recovery, after that, i did my A+Certification, then MCP, route, on that time Windows NT , that help me to open my mind, to this field, and think like an "engineer" , after some years i return to the university, and start my career System Engineer, but always my goal, was know more about whats happening on the hdd" at nights, i was searching on net, more about that, find many pages, unfortunely, until this day, some pages was closed, where explain´s , more on deep about the File System, at this time , working with an hdd hitachi 2.5 laptop from an client, i told u i was working on tech support, that clent send me the laptop because, no was accessing, to his data, and i lost many time, but was value time , because at this year found the mhdd forum, the first je

, found some people who was working on the same field, with a lot of knowledgment, and i was reading posts, that was like on 2004 , reading posts, and sending my request to that people was the help to know an little and start on the most wonderfull, field for me the Engineering of the HDD¨s, but the people doesnt told me the answers only they were the guide, to know where i should be search, and what i should be to know, to understand an little about the hdd´s, and like many people i want to know on this moment all," how to did a head swap, how to repair sa" etc, but i learned only with patient, and practice, many practice, and of course at that time i was studying the System Engineer career, wich was the help too Thanks God, to undierstand and open my mind, to this field, because at the topics on the career we learned about the Microcontroller system, how do they work, how works RAM, Registers for an microcontroller, at that case was "Atmega Family" and all this story was necessary to understand an little and start my business of Data Recovery ,like u know this is an closed field, because need many wasted time, many hours without no sleep, and of course the "experience" but finally u got the results, now i has 28 years old, but i cant said i wasted my time no, thanks God, and thanks all my friends where find this great forum, so i can told, u the tools its not enough, they only that "tools" and the data recovery field, are not easy solutions, the most important its u need to understand "whats happening inside" this is my share
Regards
Alberto