It has an internal hard drive that came with the system. So I believe it is official. I don't kn ow how to tell if it is "Partition 2", as you said, unless all official Xbox 360 hard drives ...

I am aware of that.
What I am looking for is a workaround solution for those original Xbox discs that normally will not play on the Xbox 360, but can play on it with an update to the 360's hard driv ...

I have many original Xbox games I want to play on my Xbox 360.
I didn't want to buy a wireless adapter so I could connect my 360 to my home WI-fi network, and download the necessary file that way.
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I tried playing Dead or Alive 3 on my Xbox 360. I got an error message stating that "this original Xbox game is not supported on your Xbox 360 console."

Problem is, there in this list of ...