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This command applies only to NetBackup Enterprise Server.
tlmd interfaces with Media Manager to automatically mount and unmount tapes in a tape library multimedia (TLM) robot. ltid is the Media Manager device daemon on UNIX and Linux systems and the NetBackup Device Manager service on Windows systems. ltid initiates tlmd if drives are defined to be in a tape library multimedia robot.
tlmd communicates with the ADIC Distributed AML Server (DAS) that controls the robot. This client and the server software product are designed to provide shared access to the family of ADIC Automated Media Libraries (AML). When the connection is established, tlmd puts the TLM robot in the UP state and can request inventories as well as media mounts and dismounts. If the connection cannot be established or DAS errors occur, tlmd changes the robot to the DOWN state but continues in operation. In this state, tlmd continues in operation and returns the robot to the UP state when the problem no longer exists.
The DAS server attribute
defines the DAS server in the TLM robot entry in the Media and
Device Management of the Administration Console. For each defined
TLM robot, tlmd connects to this DAS
server. From the perspective of DAS, tlmd connects as a DAS client. The host running
tlmd establishes communication as the
DAS client that the DAS_CLIENT entry
in the Media Manager configuration file specifies: /usr/openv/volmgr/vm.conf. If no DAS_CLIENT entry exists, the DAS client name is
the standard host name for the host that is running tlmd.
The drives are configured by using DAS drive names, which are based on the information that is obtained from the DAS server. You can use the robotic test utility, tlmtest (robtest if the robot is configured), to determine the drive names that are associated with the robot. You can also use ADIC's DASADMIN to verify library communications, status, and functionality.
The control daemon, tldcd, is on the host that has the robotic control. tldd on that host automatically starts it (see EXAMPLES).
On UNIX and Linux
systems, the Internet service port number for tlmd 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. To override the services file, create the
/usr/openv/volmgr/database/ports/tlmd
file with a single line that contains the service port number for
tlmd.
On Windows systems, the
Internet service port number for tlmd
must be in %SystemRoot%\system32\drivers\etc\services. To
override the services file, create the install_path\Volmgr\database\ports\tlmd
file with a single line that contains the service port number for
tlmd.