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Sun Cluster 3.1 - 3.2 With Sun StorEdge 6120 Array Manual for Solaris OS

ProcedureHow to Remove a Dual-Controller Configuration

Use this procedure to remove a dual-controller configuration from a running cluster. This procedure defines Node A as the node with which you begin working. Node B is another node in the cluster.

Caution – Caution –

During this procedure, you lose access to the data that resides on each partner group that you are removing.

Before You Begin

This procedure provides the long forms of the Sun Cluster commands. Most commands also have short forms. Except for the forms of the command names, the commands are identical. For a list of the commands and their short forms, see Appendix A, Sun Cluster Object-Oriented Commands, in Sun Cluster 3.1 - 3.2 Hardware Administration Manual for Solaris OS.

To perform this procedure, become superuser or assume a role that provides solaris.cluster.read and solaris.cluster.modify role-based access control (RBAC) authorization.

  1. If necessary, back up all database tables, data services, and volumes that are associated with each partner group that you are removing.

  2. If necessary, detach the submirrors from each storage array or partner group that you are removing. Detach the submirrors to stop all I/O activity to the storage array or partner group.

    For more information, see your Solaris Volume Manager or Veritas Volume Manager documentation.

  3. Remove references to each LUN. This LUN belongs to the storage array or partner group that you are removing.

    For more information, see your Solaris Volume Manager or Veritas Volume Manager documentation.

  4. Determine the resource groups and device groups that are running on Node A.

    You will need this information to restore resource groups and device groups to the original node in Step 19 and Step 20 of this procedure.

    • If you are using Sun Cluster 3.2, use the following commands: 


      # clresourcegroup status -n NodeA 
# cldevicegroup status -n NodeA

    • If you are using Sun Cluster 3.1, use the following command:


      # scstat

  5. Shut down Node A.

    For the procedure about how to shut down and power off a node, see Chapter 3, Shutting Down and Booting a Cluster, in Sun Cluster System Administration Guide for Solaris OS.

  6. Disconnect from both storage arrays the fiber-optic cables that connect to the FC switches. Then disconnect the Ethernet cables.

  7. If any storage array that you are removing is the last storage array that is connected to an FC switch that is on Node A, disconnect the fiber-optic cable between Node A and the FC switch that was connected to this storage array.

    If no storage array that you are removing is the last array connected to any switch, skip to Step 11.

    For the procedure about how to remove a fiber-optic cable, see the Sun StorEdge 6020 and 6120 Array System Manual.

  8. If you want to remove the host adapters from Node A, power off the node.

    If you do not want to remove host adapters from the node, skip to Step 11.

  9. Remove the host adapters from Node A.

    For the procedure about how to remove host adapters, see the documentation that shipped with your host adapter and nodes.

  10. Without enabling the node to boot, power on Node A.

    For more information, see your Sun Cluster system administration documentation.

  11. Boot Node A into cluster mode.

    For more information about how to boot nodes, see Chapter 3, Shutting Down and Booting a Cluster, in Sun Cluster System Administration Guide for Solaris OS.

  12. Shut down Node B.

    For the procedure about how to shut down and power off a node, see Chapter 3, Shutting Down and Booting a Cluster, in Sun Cluster System Administration Guide for Solaris OS.

  13. If any storage array that you are removing is the last storage array that is connected to an FC switch that is on Node B, disconnect the fiber-optic cable that connects this FC switch to Node B.

    For the procedure about how to remove a fiber-optic cable, see the Sun StorEdge 6020 and 6120 Array System Manual.

  14. If you want to remove the host adapters from Node B, power off the node.

    If you do not want to remove host adapters, skip to Step 17.

  15. Remove the host adapters from Node B.

    For the procedure about how to remove host adapters, see the documentation that shipped with your nodes.

  16. Without enabling the node to boot, power on Node B.

    For more information, see your Sun Cluster system administration documentation.

  17. Boot Node B into cluster mode.

    For more information about how to boot nodes, seeChapter 3, Shutting Down and Booting a Cluster, in Sun Cluster System Administration Guide for Solaris OS.

  18. On all nodes, update the /devices and /dev entries.

    • If you are using Sun Cluster 3.2, use the following command: 


      # devfsadm -C
# cldevice clear

    • If you are using Sun Cluster 3.1, use the following command: 


      # devfsadm -C
# scdidadm -C

  19. (Optional) Restore the device groups to the original node.

    Perform the following step for each device group you want to return to the original node.

    • If you are using Sun Cluster 3.2, use the following command: 


      # cldevicegroup switch -n nodename devicegroup1[ devicegroup2 …]
      -n nodename

      The node to which you are restoring device groups.

      devicegroup1[ devicegroup2 …]

      The device group or groups that you are restoring to the node.

    • If you are using Sun Cluster 3.1, use the following command: 


      # scswitch -z -D devicegroup -h nodename

  20. (Optional) Restore the resource groups to the original node.

    Perform the following step for each resource group you want to return to the original node.

    • If you are using Sun Cluster 3.2, use the following command: 


      # clresourcegroup switch -n nodename resourcegroup1[ resourcegroup2 …]
      nodename

      For failover resource groups, the node to which the groups are returned. For scalable resource groups, the node list to which the groups are returned.

      resourcegroup1[ resourcegroup2 …]

      The resource group or groups that you are returning to the node or nodes.

    • If you are using Sun Cluster 3.1, use the following command: 


      # scswitch -z -g resourcegroup -h nodename