This was written by DT's original drummer, Mike Portnoy.
You'll note, his replacement Mike Mangini does a pretty good job.
This is pretty much note for note, beat for beat, what they did 30 years ago.
https://www.youtube.com/watch?v=dau5acQfaww
If you want to reply, then
register here. Registration is free and your account is created instantly, so you can post right away.