well i did some more research online and alot of the time this has to do with viewing something off a dvd. and that's exactly what i was doing.
i was ripping tons and tons of movies from dvds, to this external drive..
and first i got this delayed write error, which i read was something with the usb2.0 and external drives.
Then as it was ripping movies i was browser, winamp and then tried to view one of the movies from the disc at the same time and then when this happened. it hasn't happened since.
so im thinking it was a conflict error in trying to do all that shit at the same time.