Synopsis: afd0: READ_BIG command timeout - resetting State-Changed-From-To: open->closed State-Changed-By: sos State-Changed-When: Mon May 5 05:24:57 PDT 2003 State-Changed-Why: Sounds like HW trouble to me. You should try -current and see if that handles the situation better. http://www.freebsd.org/cgi/query-pr.cgi?pr=50220