I'm using bpstart_notify to run a script that will run a storage snapshot function and mount some LUNs to directories (/backup/disk1, /backup/disk2...) with several GBs each.
The server is an HP-UX IA-64 NBU Standard Client 6.5.3.1.

At the beginning of the backup job it takes long enough to run the script (the same amount of  time when I run the script manually) and when the Netbackup start writing to tape, it only backs up the empty directories (disk1, disk2...).

When the backup job start, before the script run, Netbackup estimates the backup size and says has only 32Kb of data (the directories are stil empty).

It seems that NetBackup backs up only the data found during the estimate, before the disks are mounted, even the disks are mounted with data in it.

Any ideas?