Differential backups perform FULL backups

Folks,

Since we have upgraded to SP5 my SAN
attached servers are performing a FULL
backup when I schedule a differential.

NetWare 6.5 SP5
TSA5UP19 installed
Backup Exec 9.1 1158.9

Any suggestions? The new TSAFWGW
fixed my differentials of my Post Offices.
Now I just need to get my file servers
back to differentials.

Bill Morris
Enterprise Technology Services & Support
North Carolina State University