Hi,
Please notice this error from your log:

----------------
01/10/2005 13:48:50 albus.ucdavis.edu albus.ucdavis.edu  FREEZING media id
040004, External event caused rewind during write, all data on media is lost
01/10/2005 13:48:54 albus.ucdavis.edu albus.ucdavis.edu  CLIENT
albus.ucdavis.edu  POLICY IR-ISM_02  SCHED WeeklyFull  EXIT STATUS 84 (media
write error)
01/10/2005 13:48:54 albus.ucdavis.edu albus.ucdavis.edu  backup of client
albus.ucdavis.edu exited with status 84 (media write error)
----------------
Either you have some program on the sun box scanning the SCSI bus, or you
have another machine on the SAN that can see the device and is rewinding the
tape drive, or resetting the tape drive. (Thus the External event message)

Things like Compaq insight manager (windows)
HP (forget where it's done but it does an IO scan, which will reset the
drive), etc. will cause this type of error.
Check all you cron jobs on the Solaris machine.

You might want to check you're zoning at the switch make sure that the Sun
machine and the tape devices are all that's in the zone.

FYI, you should not have to make a change to the st.conf file for the LTO
drives, native support is in the ST driver.


Gary






Gary Andresen
Impossible Happens, Plan Ahead
Pacific Northwest Data Inc. 
Tel: 503.701.5185
Fax: 503.692.3910
gary.andresen AT pnwdata DOT com
www.pnwdata.com