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Sun Cluster 3.0-3.1 With SCSI JBOD Storage Device Manual for Solaris OS

ProcedureDisconnect the Node from Shared Storage

You must maintain proper SCSI-bus termination during this procedure. The process by which you disconnect the node from shared storage depends on whether you have host adapters available on Node B. If you do not have host adapters available on Node B and your storage device does not have auto-termination, you must use terminators.

Note –

To determine the specific terminator that your storage array supports, see your storage documentation. For a list of storage documentation, see Related Documentation.

Steps

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

    Record this information because you use this information in Step 6 to return resource groups and device groups to these nodes.


    # scstat

  2. Identify the submirrors on the storage array that is connected to Node A.

  3. Move all resource groups and device groups off Node A.


    # scswitch -S -h nodename

  4. (Optional) If necessary, detach the submirrors on the storage array that is connected to Node A.

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

  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. To maintain proper SCSI-bus termination during this procedure, perform one of the following steps. The approach you choose depends on whether you have an available host adapter on Node B.

    • Disconnect the SCSI cable between Node A and the storage array. Attach this SCSI cable to Node B on the storage array. For an illustration, see Figure 2–1.

      Figure 2–1 Disconnecting the Node from Shared Storage by Using Host Adapters on Node B

      Illustration: The following context describes the graphic.

    • Disconnect the SCSI cable between Node A and the storage array. Install an appropriate SCSI terminator to this SCSI connector on the storage array. For an illustration, see Figure 2–2.

      Figure 2–2 Disconnecting the Node from Shared Storage by Using Terminators

      Illustration: The following context describes the graphic.

  7. Boot Node A into cluster mode.

  8. If you detached the submirrors in Step 4, reattach the submirrors. Wait for the submirrors to resynchronize.

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

  9. Repeat Step 4 through Step 8 for each remaining storage array that is connected to Node A.

  10. Reconnect the node to the shared storage as outlined in Reconnect the Node to Shared Storage.