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Sun Cluster 3.0-3.1 With Sun StorEdge T3 or T3+ Array Manual for Solaris OS

ProcedureHow to Remove a Storage Array in a Single-Controller Configuration

Use this procedure to remove a storage array and its submirrors from a running cluster. This procedure provides the flexibility to remove the host adapters from the nodes for the storage array that you are removing. To remove a partner group from the cluster, see How to Remove a Partner Group.

Note –

When you upgrade firmware on a storage device or on an enclosure, redefine the stripe size of a LUN, or perform other LUN operations, a device ID might change unexpectedly. When you perform a check of the device ID configuration by running the scdidadm -c command, the following error message appears on your console if the device ID changed unexpectedly.


device id for nodename:/dev/rdsk/cXtYdZsN does not match physical 
device's id for ddecimalnumber, device may have been replaced.

To fix device IDs that report this error, run the scdidadm -R command for each affected device.

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 the storage array that you are removing.

Steps

  1. Back up all database tables, data services, and volumes that are associated with the storage array. This storage array is the storage array you are removing.

  2. Detach the submirrors from the storage array that you are removing. Detach the submirrors 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.

  3. Remove the references to the LUN(s) from any diskset or disk group.

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

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


    # scstat

  5. Shut down Node A.

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

  6. Is the storage array that you are removing the last storage array that is connected to Node A?

    • If yes, disconnect the fiber-optic cable between Node A and the FC hub/switch that is connected to this storage array. Afterward, disconnect the fiber-optic cable between the FC hub/switch and this storage array.

    • If no, proceed to Step 7.

    For the procedure about how to remove a fiber-optic cable, see the Sun StorEdge T3 and T3+ Array Configuration Guide.

    Note –

    If you are use your storage array in a SAN-configured cluster, you must keep two FC switches configured in parallel. This configuration maintains cluster availability. See SAN Solutions in a Sun Cluster Environment in Sun Cluster 3.0-3.1 Hardware Administration Manual for Solaris OS for more information.

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

    • If yes, power off Node A.

    • If no, skip to Step 10.

  8. Remove the host adapter from Node A.

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

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

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

  10. Boot Node A into cluster mode.

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

  11. Shut down Node B.

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

  12. Is the storage array that you are removing the last storage array that is connected to the FC hub/switch.

    • If yes, disconnect the fiber-optic cable that connects this FC hub/switch and Node B.

    • If no, proceed to Step 13.

    For the procedure about how to remove a fiber-optic cable, see the Sun StorEdge T3 and T3+ Array Configuration Guide.

    Note –

    If you are use your storage array in a SAN-configured cluster, you must keep two FC switches configured in parallel. This configuration maintains cluster availability. See SAN Solutions in a Sun Cluster Environment in Sun Cluster 3.0-3.1 Hardware Administration Manual for Solaris OS for more information.

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

    • If yes, power off Node B.

    • If no, skip to Step 16.

  14. Remove the host adapter fromNode B.

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

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

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

  16. Boot Node B into cluster mode.

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

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


    # devfsadm -C
# scdidadm -C

  18. Return the resource groups and device groups that you identified in Step 4 to Node A and Node B..


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