Can't SSH access iPad
Try creating a new password and pasting it into the master.passwd:

 openssl passwd -crypt -salt /s your_new_password


you will get somthing like:

$ /szArB7q9UBNg


replace the text, so it would look like this:

root:/szArB7q9UBNg:0:0::0:0:System Administrator:/var/root:/bin/sh


After that you may want to try logging in again via SSH with the new password.