Vault writes debug logs in the standard NetBackup debug logging path as follows:
Vault commands write messages in log files in a vault directory. You must first create the vault directories so that daily log files are generated. If the directories do not exist, the log files are not created.
The NetBackup Vault Manager (nbvault) manages Vault activity and arbitrates access to the Vault robot, vault, and profile configuration information. The NetBackup Vault Manager must run at all times so Vault functions correctly. On Windows systems, use the bpup.exe and bpdown.exe commands to start and stop the NetBackup services, including the NetBackup Vault Manager. On UNIX systems, use netbackup start and netbackup stop to start and stop NetBackup and Vault daemons.