We have Netbackup 6.0 MP2 installed on Solaris 9.0

I am taking raw backup of a veritas volume manager diskgroup.

and specifying "/dev/vx/rdsk/diskgroupname/volumename" in the backup selection.

The backup completes successful ..

however the volume size which is 2GB in vxprint -htg diskgroupname is shown
as only 1GB in the backup/restore window ..

However while taking backup it shows backed up 2Gb data ..

why it is not showing correct volume sizer in backup /restore window of netbackup

any help ...