How to Remove a Storage Array

Use this procedure to permanently remove a storage array. This procedure provides the flexibility to remove the host adapters from the nodes that are attached to the storage array that you are removing.

This procedure defines Node A as the node with which you begin working. Node B is another node in the cluster.

If you need to remove a storage array from more than two nodes, repeat Step 15 through Step 22 for each additional node that connects to the storage array.

During this procedure, you lose access to the data that resides on the storage array that you are removing.

Steps

1. If necessary, back up all data and migrate all resource groups and disk device groups to another node.

2. Determine if the storage array that you plan to remove is configured as a quorum device.

   # scstat -q

   • If the storage array is not a quorum device, proceed to Step 3.

   • If the storage array is configured as a quorum device, choose and configure another device to be the new quorum device. Then remove the old quorum device.

     To add and remove a quorum device in your configuration, see your Sun Cluster system administration documentation.

3. If necessary, detach the submirrors from the storage array that you are removing in order to stop all I/O activity to the storage array.

   For more information, see your Solstice DiskSuite/Solaris Volume Manager or VERITAS Volume Manager documentation.

4. Run the appropriate Solstice DiskSuite/Solaris Volume Manager or VERITAS Volume Manager commands to remove the references to the logical volume(s) from any diskset or disk group.

   For more information, see your Solstice DiskSuite/Solaris Volume Manager or VERITAS Volume Manager documentation.

5. Are your nodes enabled with the Solaris dynamic reconfiguration (DR) feature?

   • If yes, disconnect the fiber-optic cables and, if desired, remove the host adapters from both nodes. Then perform Step 22 on each node that was connected to the storage array

     For the procedure about how to remove a host adapter, see the documentation that shipped with your host adapter or updated information on the manufacturer's web site.

   • If no, proceed to Step 6.

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

   Record this information because that you use this information in Step 21 of this procedure to return resource groups and device groups to these nodes.

   # scstat

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

7. Do you want to remove any multipathing software?

   • If no, proceed to Step 8.

   • If yes, remove the multipathing software packages.

8. Stop the Sun Cluster software on Node A, and then shut down Node A.

   For the procedure about how to shut down and power off a node, see your Sun Cluster system administration documentation.

9. Disconnect the fiber-optic cable between the storage array and Node A.

10. Do you want to remove the host adapter from Node A?

    • If no, skip to Step 13.

    • If yes, power off Node A.

11. Remove the host adapter from Node A.

    For the procedure about how to remove host adapters, see the documentation that shipped with your host adapter or updated information on the manufacturer's web site.

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

    For more information, see the documentation that shipped with your server.

13. Boot Node A into cluster mode.

    For more information about how to boot nodes, see your Sun Cluster system administration documentation.

14. On Node A, update the device namespace.

    # devfsadm -C

15. Stop the Sun Cluster software on Node B, and then shut down Node B.

    For the procedure about how to shut down and power off a node, see your Sun Cluster system administration documentation.

16. Disconnect the fiber-optic cable between the storage array and Node B.

17. Do you want to remove the host adapter from Node B?

    • If no, skip to Step 20.

    • If yes, power off Node B.

18. Remove the host adapter from Node B.

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

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

    For more information, see the documentation that shipped with your server.

20. Boot Node B into cluster mode.

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

21. Return the resource groups and device groups that you identified in Step 6 to Node B.

    # scswitch -z -g resource-group -h nodename # scswitch -z -D device-group-name -h nodename

22. On Node B, update the device namespace.

    # devfsadm -C

23. Repeat Step 15 through Step 22 for each additional node that connects to the storage array.

24. From one node, remove device ID references to the storage array that was removed.

    # scdidadm -C