i've been using a gnutella client (LW) for about a year now and i am curious about something. if all of my shared files are on my hard drive, how come it never seems like my HD is being read when someone uploads from me? where are they getting the shared files from?

also, it's the same with searches. how do the searches coming in to my PC know what files i am sharing if my HD never seems to get read???

i've read lots about gnutella, but cant seem to find my answer anywhere.