SnapVault for NetBackup qtree images follow the default file system naming convention.
.nbu_image_data is a special qtree that contains information specific to the tar images associated with each qtree.
nbu_basename_policyname_suffix is the qtree naming convention where each name is specific to NetBackup client and policy settings.
nbu_online_data is the directory in which data is unpacked. It is a subdirectory of the nbu_basename_policyname_suffix qtree. Data ONTAP 7.2 and later support viewing backed up data in this qtree.
For more information, see the NetBackup documentation.