-Is there anyway I can try it with my NTFS drive without using a USB flash drive and without formating?
From the Unslung web pages:
The root device for Unslung must be natively formatted by the NSLU2 (i.e. it is not sufficient that it simply be formatted as ext3).
I have heard most people like the performance of the datastick in port 2 for the unslung drive and hard drives in port 1 for data and music.