Adding a node to a device domain

A device domain is a subset of nodes in a cluster that shares device resources.

If you are implementing a high-availability solution that contains independent disk pools-based technologies, such as switched disk or cross-site mirroring, you must define the node as a member of a device domain. After you add the node to a device domain, you can create a device cluster resource group (CRG) that defines the recovery domain for the cluster. All nodes that will be in the recovery domain for a device CRG must be in the same device domain. A cluster node can belong to only one device domain.

To create and manage device domains, you must have PowerHA® Option 41 (HA Switchable Resources) installed. A valid license key must exist on all cluster nodes in the device domain.

The PowerHA graphical interface simplifies device domain management by ensuring that the required nodes are in a device domain when a device CRG is created or when a node is added to a device CRG.

To add a node to a device domain using the PowerHA graphical interface, follow these steps:

  1. In a Web browser, enter http://mysystem:2001, where mysystem is the host name of the system.
  2. Log on to the system with your user profile and password.
  3. Click PowerHA from the IBM® Navigator for i window.
  4. On the PowerHA page, click Cluster Nodes.
  5. On the Cluster Nodes page, select Properties ... from the context menu of the node you want to add to a device domain.
  6. Click Edit in the General section of the Properties page.
  7. Specify the name of the device domain to which you want to add the node in the Device Domain field and click Save.