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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 Partner Group

Use this procedure to permanently remove storage array partner groups and their submirrors from a running cluster. To remove a storage array in single-controller configuration, see How to Remove a Storage Array in a Single-Controller Configuration.

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 cluster node that you begin working with. Node B is another node in the cluster.

Caution – Caution –

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

Steps

  1. If necessary, back up all database tables, data services, and volumes 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 Solstice DiskSuite or VERITAS Volume Manager documentation.

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

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

  4. Determine the resource groups and device groups that are running on all nodes.

    Record this information because you use this information in Step 19 of this procedure to return resource groups and device groups to these nodes.


    # 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. Disconnect from both storage arrays the fiber-optic cables connecting to the FC switches, then the Ethernet cable(s).

  7. Is any storage array that you are removing the last storage array connected to an FC switch that is on Node A?

    • If no, skip to Step 11.

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

      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 using your storage arrays in a SAN-configured cluster, you must keep two FC switches configured in parallel. This configuration maintains cluster availability. See SAN Considerations for more information.

  8. Do you want to remove the host adapters from Node A?

    • If no, skip to Step 11.

    • If yes, power off Node A.

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

  12. Shut down Node B.

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

  13. Is any storage array that you are removing the last storage array connected to an FC switch that is on Node B?

    • If no, proceed to Step 14.

    • If yes, 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 T3 and T3+ Array Configuration Guide.

    Note –

    If you are using your storage arrays in a SAN-configured cluster, you must keep two FC switches configured in parallel. This configuration maintains cluster availability. See SAN Considerations for more information.

  14. Do you want to remove the host adapters from Node B

    • If no, proceed to Step 17.

    • If yes, power off Node B.

  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, see your Sun Cluster system administration documentation.

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


    # devfsadm -C
# scdidadm -C

  19. Return the resource groups and device groups that you identified in Step 4 to all nodes.


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