I editted my post but I took a bit long because I was doing other stuff as well. meanwhile thetopic continued.

so for clarity, I'll repost 😉

sorry, misread your post. forget about what I just wrote.

Instead:

can you look at the waitstats during your backup and post the results.

you can find a good waitstat query here:

http://www.sqlskills.com/BLOGS/PAUL/post/Wait-statistics-or-please-tell-me-where-it-hurts.aspx%5B/quote%5D

Edward