Removing a node from a device domain

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


Be cautious when removing a node from a device domain. If you remove a node from a device domain, and that node is the current primary point of access for any independent disk pools, those independent disk pools remain with the node being removed. This means that those independent disk pools are no longer accessible from the remaining nodes in the device domain.

After a node is removed from a device domain, it cannot be added back to the same device domain if one or more of the existing cluster nodes still belong to that same device domain. To add the node back to the device domain, you must:

  1. Delete the independent disk pools currently owned by the node being added to the device domain.
  2. Restart the system by performing an IPL on the node.
  3. Add the node to the device domain.
  4. Re-create the independent disk pools that were deleted in step 1.

To remove a node from 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 on 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. Clear the Device Domain field and click Save.