Placing a Controller Online and Offline

Prerequisites:

Placing a offline makes it unavailable for I/O operations and moves its to the other controller if failover protection is enabled.

Placing a controller online sets it to status and places it in an , available for I/O operations.


Note:

The controller might be in an Offline state if it failed a diagnostics check.


Important:

Use this option only under the guidance of a representative.

Placing a Controller Offline


Attention:

Possible loss of data access – When you place a controller offline, you might not be able to access your data. Use this option only under the guidance of a representative.

Keep these guidelines in mind when you place a controller offline:


Note:

This option is only available when the controller is online.

Placing a Controller Online

If the entry is set to Enabled and you are running a host-based, multi-path driver, no action is required. The host-based, multi-path driver automatically initiates a transfer of logical drives to their preferred controller.


Note:

Detection of a restored preferred path by the multi-path driver can take up to 10 minutes.

If the Auto Logical Drive Transfer (ADT) entry is set to Disabled or you are not running a host-based, multi-path driver, select Advanced >> Redistribute Logical Drives to move the formerly ownedlogical drives back to this .


Note:

This option is only available when the controller is offline.

  1. To perform the specified task, go to the indicated step:
  2. To place a controller offline, perform these substeps:
    1. In the Physical pane, select a controller, and select Advanced >> Recovery >> Place Controller >> Offline .
    2. Click Yes.
    When you are done, you can return the controller back to the online status by using the procedure in step 3.
  3. To place a controller online, perform these substeps:
    1. In the Physical pane, select an offline controller, and select Advanced >> Recovery >> Place Controller >> Online .
    2. Click Yes.

Related Links: