your question is hard to parse grammatically.
im going to answer this question: 'what firmware image can i use to reset the rootfs on my n9?'

use NaviFirm to find this out. you have a code like 059**** on your sim card tray if you take it out. you select your phone, choose a revision that sounds new and exciting, enter your code, and download the 1.1GB file.

you can get NaviFirmEx here: https://code.google.com/p/navifirmex/
works fine in linux with wine. you can copy the url and use wget.
also works with windows, obviously.