Refinishinng 1970's top nailed oak hardwood. Drum sander went well but......

The floor edger did this (pic). I noticed this long streak about 6 inches wide that was slightly more noticeableAttachment 42613 (http://www.doityourself.com/forum/attachments/solid-hardwood-engineered-laminate-flooring/42613-refinishinng-1970s-top-nailed-oak-hardwood-drum-sander-went-well-but-20141130_205658-001.jpg) than the passing I did with the drum sander. Before I stain my floor next weekend is there a way I can fix this so its not this noticeable ? I did 36, 60, and 80 with the drum sander and just 36 with the power edger. Shall I use my belt sander to fix ?