Configuring more tape libraries

How to add another tape library to an existing IBM Storage Archive Enterprise Edition system. A maximum of two tape libraries are allowed in one IBM Storage Archive Enterprise Edition system.

1. Stop the control nodes on all tape libraries by using the eeadm cluster stop command.
2. If you are creating a new cluster for your library, go to the topic Configuring the first tape library, and follow the steps, beginning with step 1, to configure your library.

   If you are configuring your new library to use an existing cluster, proceed with the following the steps. However, if you are going to reassign any nodes from an existing tape library to the new tape library, follow the steps in Removing a node to make those nodes available for reassignment before you configure the new library.

3. Log on to the operating system as a root user.
4. If it is not already started, start the General Parallel File System (GPFS) by using the following command:

   # mmstartup -a

5. If it is not already mounted, mount the GPFS file system by using the following command:

   # mmmount all

6. Add the tape library and a control node to the cluster configuration by using the ltfsee_config -m ADD_CTRL_NODE [-c] [-g] command.

   Both the library and the control node for that library are configured with this command. There is one control node per tape library.

   The control node is assigned to a node group, and it is assigned one or more tape drives. A node group consists of one or more nodes that are connected to the same library.

   Issue one of the following commands on the node that you want to become the control node:

   • To check the current configuration without changing it, use the -m ADD_CTRL_NODE -c option. Use the following command:

     # /opt/ibm/ltfsee/bin/ltfsee_config -m ADD_CTRL_NODE -c

   • To configure a control node and assigned it to a default node group use -m ADD_CTRL_NODE without any additional options. Use the following command:

     # /opt/ibm/ltfsee/bin/ltfsee_config -m ADD_CTRL_NODE

   • To configure a control node and assign it to a specific node group, use the -m ADD_CTRL_NODE -g option. Use the following command:

     # /opt/ibm/ltfsee/bin/ltfsee_config -m ADD_CTRL_NODE -g

7. When a list of tape libraries is displayed, select the number that corresponds to the correct library and press Enter.
   See the configuration worksheet to verify which library serial number is assigned to the control node.
8. Provide a name for the selected library, or press Enter and a default name is assigned.
   The default name of the library is lib<i> where <i> is the lowest available number. For example, the first default library name that is assigned is lib1, and a subsequent library is lib2.

   The library ID is the serial number of the library.

9. When prompted to select the control node from a list of nodes, select the number that corresponds to the correct node and press Enter.
   See the configuration worksheet to verify which node serial number is assigned as the control node.

   If the -g option was not used with the ltfsee_config -m ADD_CTRL_NODE command, the control node is automatically assigned to the default node group for the library. If a default node group does not exist, it is created and assigned the name G0.

   If the -g option was used with the ltfsee_config -m ADD_CTRL_NODE command, any previously configured node groups and nodes are displayed.

   • To associate the control node with an existing node group, select the number that correspond to that node group and press Enter.
   • To create a new node group for the control node, don't select anything and press Enter. You can provide a name for the new node group, or press Enter to assign a default name. The default node group name is G<i> where <i> is the lowest available number. For example, the first default node group name that is assigned is G0, and a subsequent node group is G1.
10. When prompted to select tape drives, enter the number or numbers on the displayed list that correspond to the drives that you want to select, and press Enter.
    See the configuration worksheet to verify which drives to assign to the control node.

    After you finish assigning tape drives to the control node, the following information is stored in the configuration files:

    • The library to control node IP mapping.
    • The library ID to library name mapping.
    • The node ID.
    • The IP address.
    • The assigned node group.

    The configuration information for resources, such as libraries, nodes, node groups, drives, and tape pools, is stored in a file named libresources.<library_id>.db. The file is stored in the ltfsee/config/ directory under the file system that is reserved for IBM Storage Archive Enterprise Edition internal usage.

11. When you complete the configuration, start the control nodes on all tape libraries with the eeadm cluster start command.