I performed a simple experiment... I copied several megs to my /tmp (which
is mfs based), ran two "find / -name blah", and ran Mosaic.  I only have
16MB, so the SCSI driver was rather busy.  The following appeared in my
/var/log/messages (the start overlaps what I had in my previous post): 

Apr 27 11:22:54 henric-ppp /netbsd: wesc0: reselect interrupted, sc_nexus == NULL
Apr 27 11:23:20 henric-ppp last message repeated 42 times
Apr 27 11:25:13 henric-ppp last message repeated 63 times
Apr 27 11:31:11 henric-ppp last message repeated 49 times
Apr 27 11:45:36 henric-ppp last message repeated 475 times
Apr 27 11:50:22 henric-ppp last message repeated 1011 times
Apr 27 11:50:22 henric-ppp /netbsd: d, sc_nexus == NULL
Apr 27 11:50:25 henric-ppp /netbsd: wesc0: reselect interrupted, sc_nexus == NULL
Apr 27 11:50:59 henric-ppp last message repeated 106 times
Apr 27 11:52:11 henric-ppp last message repeated 27 times

There were quite a few messages.  Notice also the second 11:50:22 entry;
it really is corrupt (i.e., it's not a bad cut'n'paste on my part). 

-------- Henric Jungheim  -------------------  henric@zoom.com --------