Veritas NetBackup™ Commands Reference Guide
- Appendix A. NetBackup Commands
tl4d — Tape library 4MM (TL4) daemon (UNIX) or process (Windows)
On UNIX systems, the directory path to this command is /usr/openv/volmgr/bin/
On Windows systems, the directory path to this command is install_path\Volmgr\bin\
tl4d interfaces with Media Manager to mount and unmount tapes in a tape library 4MM (TL4) robot.
ltid is the Media Manager device daemon on UNIX systems and the NetBackup Device Manager service on Windows systems. ltid starts tl4d if the Media and Device Management of the Administration Console shows drives in the robot. Stopping ltid stops tl4d.
UNIX systems: You can stop or start tl4d independently of ltid by using
/usr/openv/volmgr/bin/vmps or your server's ps command to identify the tl4d process ID. Then enter the following commands:
kill tl4d_pid /usr/openv/volmgr/bin/tl4d [-v] &
tl4d communicates with the robotics through a SCSI interface. When the connection is established (the path for robotics can be opened), tl4d puts the TL4 robot in the UP state. It then can mount and unmount tapes. If the robotics are inaccessible, tl4d changes the robot to the DOWN state. In this state, tl4d is still running and returns the robot to the UP state if it is able to make a connection.
Before you access any tapes, must define the following information: the media ID and slot number information for 4-mm tapes in a robot in the Enterprise Media Manager Database.
If a cleaning volume is used, it must be defined in the volume configuration. See tpclean for information on setting the frequency to clean the drive automatically.
On UNIX systems, the Internet service port number for tl4d must be in
/etc/services. If you use NIS (Network Information Service), place the entry in this host's
/etc/services file in the master NIS server database for services.
On Windows systems, the Internet service port number for tl4d must be in
The default service port number is 13713.
You must have administrator privileges to execute this command.
This option applies only to UNIX systems. It logs debug information using syslogd. If you start ltid with -v, tl4d also starts with -v.
tl4d returns an error message if a copy of tl4d is in operation.
Media Manager logs any tape library 4MM and robotic errors to syslogd. Log entries are also made when the state changes between UP and DOWN.
Media Manager logs any tape library 4MM and robotic errors to the Windows application event log. Log entries are also made when the state changes between UP and DOWN.