Environment: NBU 6.5.3
Master Server : UNIX Solaris 10
Media Servers: UNIX Solaris 10
Clients: Unix Solaris 10

I have several UNIX clients backing up to disk. The Full backups fail (both "attempts") over the weekend with a status 13. The "retries" (set to 4 hours later) seem to  work just fine. I've moved the schedule to when the "retries" occur to see if this will resolve the caching issue. It did not. I've asked our Physcial Network Infrastructure group to monitor the Activity during these times and cannot seem to pinpoint the issue. I've asked our UNIX Admins to run SAR over the weekend and processes seem normal. I've called Symantec Tech Support and they seem to have minimal knowledge of all the logs i've given them (from master to client logs). If I bakcup to tape, I am certain that it WILL work. But, it defeats the purpose for DR.  What am I missing here? Has anyone else gone through this and found a permanent solution?

Thank you
Jay Son