External hard drive no detected in a vista ultimate

Question

I have created a partition in my external HD and later i am trying to install XP over Vista . So i have entered into my DOS prompt and i choose the DISK TYPE and i choose external DD and i tried to CLEAN it , Immediately my external HD is asked for FORMAT and i rejected it . After that i restarted my system , therefore i cannot able to see my external HD on my sysmen

External HD: Seagate Free agent(500GB)

Answer 1

It is possible that the drivers for the external HDD is on the HDD itself, and that you no longer can access it because of this.

I had this issue myself when I tried to format one of my own external HDD's.

Try downloading the drivers from the product website