Different File System Backup Fail

Hi

We are using Symantec Netbackup 7.5 with standalone tape drive connected to it.. Operating System RedHat Linux 6.5

Following 4 Logical Volumes are created the server of which backup needs to be taken

/opt/osi - Logical Vol 1

/opt/osi/monarch/savecase- - Logical Vol 2

/opt/osi/monarch/hrs - Logical Vol 3

/opt/osi/monarch/trendarc - Logical Vol 4

A policy is been created to backup all above mentioned Folders.

Backup is completed successfully but only Logical Vol 1 is backed up whereas other logical volumes are ignored with message(different filesystem, skipping)

Thank You