About persistent DSF pass-through paths
Although NetBackup requires the /dev/rtape DSFs to configure tape drives, NetBackup uses pass-through device files for drive access.
NetBackup creates pass-through paths for all valid /dev/rtape paths. NetBackup creates the paths during device discovery or when you run the /usr/openv/volmgr/bin/scan command. The following is the file name format:
/dev/pt/pt_tape#
The # represents the instance number that matches the number in the /dev/rtape/tape#_BESTnb device file or that is retrieved from the ioscan output.
Although NetBackup uses the pass-through device files during tape drive operations, you specify the /dev/rtape device files if you configure the drives manually in NetBackup. NetBackup then uses the appropriate pass-through device files.