Uh, what kind of disc? Computer? Back?
Not a bad tool. It will tell you what you should already know.
Personality profiles simply ask you questions about your personality and then tell you what you said.
We use them with our Human Resource Management students each year. They seem to work quite well at identifying the personality traits of the person taking the survey.
Here is a freebie..
http://www.gregwiens.com/disc.htm
I’ve done a number of different types of these personality tests. Like any, the DISC can be revealing, but in my experience none of them lead to any long term benefits. Perhaps others have had different experiences.