Unconfiguring a Cluster Node

This procedure describes how to unconfigure a cluster node to standalone operation. A cluster node that has been unconfigured cannot be restored to the same cluster configuration because the unconfigure operation is destructive and results in data loss.

Caution:

In general, do not unconfigure a cluster node yourself. Unconfiguring a cluster node results in data loss. Contact Oracle Support.

The following are reasons that you might want to unconfigure clustering:

• You no longer want to use clustering. Instead, you want to configure two independent storage appliances.

• You are replacing a failed storage controller with:

  • New hardware

  • A storage controller with factory-fresh appliance software

  Note:

  This replacement should be performed by your service provider.

1. Back up the data on the cluster storage resources.
2. On the first controller (controller-a), perform a factory reset.

   See Factory Resetting Clustered Controllers in Oracle ZFS Storage Appliance Customer Service Manual, Release OS8.8.x.

3. When controller-a starts to reboot, immediately turn off its power.

   Verify the power off and controller state. See Clustered Controller States.

4. Completely disconnect controller-a, including all network, SAS, and clustering cables.
5. On the second controller (controller-b), from the Configuration BUI menu, select Cluster, and click UNCONFIG.

   Controller-b can still serve data.

6. Optional: Reconfigure the cluster.

   Controller-b is now a standalone appliance, and controller-a is factory reset and powered off. If you want to reconfigure these into a cluster, follow the instructions in Upgrading a Standalone Appliance to a Clustered Configuration (BUI).