Placing a Controller Offline

$DEV_NAME $FRU_NAME, has been selected.

To prepare for this maintenance activity, be aware of the following important conditions:

  • Enable the reserve the Common Storage Module (CSM) or Common Expansion Module (CEM) function.

    1. Reserve the CSM/CEM for maintenance.

    2. Enter a description of the service action (placing a controller in Offline).

    3. Select the estimated amount of time of the service action from the pull-down.

    4. Select the Reserve button.

      a) Other users will be alerted that this service action is in progress when they login.

  • Verify that the host has multi-path drivers installed. If multi-path drivers are NOT installed I/O errors will occur when the controller is placed Offline.

  • Placing a controller Offline makes it unavailable for I/O operations and moves it's volumes to the other controller without affecting their access.

  • Placing a controller Offline may significantly reduce performance.

  • Before placing a controller Offline make sure the customer is aware of this service action.

    To Place a Controller Offline

    1. Place the controller Offline.

    2. Verify that the controller is now Offline.

      a) The controller card State should be "Enabled but Offline" and the Status will be "Error".

    3. Perform the maintenance activity.

    To Place a Controller Online

    1. Place the controller Online.

    2. Verify that the controller is now Online.

      a) The controller card State should be "Enabled" and the Status "OK".

    3. The volumes will need to be moved back to the "preferred" manager/controller: Redistribute volumes.

    4. The Agent will now need to be run to provide a current update on the volumes and their "preferred" manager/controller.

      a) Run the Agent.

      b) At the Agent Summary window, select the box under the Add Agent column for the appropriate host that the new tray is attached to.

      c) Select the "Run Agent" button to execute the Agent.

    5. After the Agent has executed, verify that the volumes are now on their "preferred" manager/controller Verify volumes.

      a) From the Device Details screen, under Logical Components, select "Volume".

      b) From the Volume Summary screen, select the appropriate "volume name".

      c) From the Volume Details screen, under the Property column, find "On Preferred Manager" and verify that the Value is "true".

    6. If the volumes are not on their "preferred" manager/controller or the controller/IOM "State" and "Status" are not as expected contact your Sun Service provider or your next level of technical support.

    7. Disable the reserve CSM/CEM function.

      a) Select the Release button.