Remove a node from a device domain

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

Important:

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 will no longer be accessible from the remaining nodes in the device domain.

Once 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. In order 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. Perform a system restart (IPL) on the node.
  3. Add the node to the device domain. See Add a node to a device domain.
  4. Recreate the independent disk pools deleted in Step 1.

Using iSeries™ Navigator

This requires Option 41 (HA Switchable Resources) to be installed and licensed.

To remove a node from a device domain in iSeries Navigator, follow these steps:

  1. In iSeries Navigator, expand Management Central.
  2. Expand Clusters.
  3. Expand the cluster that contains the node you want to remove from the device domain.
  4. Click Nodes.
  5. Right-click the node you want to remove from the device domain, and select Properties.
  6. On the Clustering page, remove the entry in the Device domain field.

Using CL commands and APIs

You can also use the following to remove a node from a device domain:

Parent topic: Manage clusters
Related concepts
Device domains
Related tasks
Add a node to a device domain
Adding a disk unit or disk pool