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Controller Assignment

Assigning a Server to Manage a Controller

To manage and monitor an array, the agent needs to have access to a host logical unit number (LUN) mapped to a partition of a logical drive assigned to the primary controller of the array. The agent ignores all host LUNs mapped to a partition of a logical drive assigned to a secondary controller in a redundant configuration of an array.

If the same array is connected to multiple servers, it is possible to have the agent running on each of these servers trying to manage and monitor the same array. Due to a restriction on monitoring commands to be sent to the array controller by only one server at a time, some monitoring commands might fail if sent simultaneously by multiple servers. This could cause inaccurate reporting or the processes to stop responding. To prevent this from happening, the agent can be configured to enable and disable array monitoring on a server.

CAUTION: SANscape can monitor and manage up to 32 arrays at one time. However, console response time can decrease as the number of arrays increases.

Perform the following procedure to assign a server to manage an array:

  1. Make sure all directly attached servers were added following the procedures in Adding a Server. This ensures that all Host names are present under Controller Assignments.
  2. From the main window, choose Array Administration > Controller Assignment. The Assign Server to Manage a RAID Controller window is displayed.
  3. Select the controller that you want to manage.

  4. Select a server from the Server to Manage this controller list and click Apply.
  5. This enables the selected server to manage an array controller. It also disables all other servers listed on the list box from managing the same array.

  6. Click Close to close the view.
  7. The main window shows the array controller device icon only under the server where the monitoring is enabled for this array.

    For information on changing a server assignment, see Changing a Server Assignment.

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