Oracle^® Solaris Cluster 4.3 System Administration Guide

Removing or Replacing a Quorum Device

This section provides the following procedures for removing or replacing a quorum device:

• How to Remove a Quorum Device

• How to Remove the Last Quorum Device From a Cluster

• How to Replace a Quorum Device

How to Remove a Quorum Device

When a quorum device is removed, it no longer participates in the voting to establish quorum. Note that all two-node clusters require that at least one quorum device be configured. If this is the last quorum device on a cluster, clquorum(1CL) will fail to remove the device from the configuration. If you are removing a node, remove all quorum devices connected to the node.

The phys-schost# prompt reflects a global-cluster prompt. Perform this procedure on a global cluster.

This procedure provides the long forms of the Oracle Solaris Cluster commands. Most commands also have short forms. Except for the long and short forms of the command names, the commands are identical.

1. Assume a role that provides solaris.cluster.modify authorization on any node in the cluster.
2. Determine the quorum device to be removed.

   # clquorum list -v

3. Execute the clsetup utility.

   # clsetup

   The Main Menu is displayed.

4. Type the number for the option for Quorum.
5. Type the number for the option to remove a quorum device.

   Answer the questions displayed during the removal process.

6. Quit clsetup.
7. Verify that the quorum device is removed.

   # clquorum list -v

Troubleshooting

If you lose communications between the cluster and the quorum server host while removing a quorum server quorum device, you must clean up stale configuration information about the quorum server host. For instructions on performing this cleanup, see Cleaning Up Stale Quorum Server Cluster Information.

How to Remove the Last Quorum Device From a Cluster

This procedure removes the last quorum device from a two-node cluster by using the clquorum force option, –F. Generally, you should first remove the failed device and then add the replacement quorum device. If this is not the last quorum device in a two-node cluster, follow the steps in How to Remove a Quorum Device.

Adding a quorum device involves a node reconfiguration, which touches the failed quorum device and panics the machine. The Force option lets you remove the failed quorum device without panicking the machine. The clquorum command enables you to remove the device from the configuration. For more information, see the clquorum(1CL) man page. After you remove the failed quorum device, you can add a new device with the clquorum add command. See Adding a Quorum Device.

The phys-schost# prompt reflects a global-cluster prompt. Perform this procedure on a global cluster.

This procedure provides the long forms of the Oracle Solaris Cluster commands. Most commands also have short forms. Except for the long and short forms of the command names, the commands are identical.

1. Assume a role that provides solaris.cluster.modify authorization on any node in the cluster.
2. Remove the quorum device by using the clquorum command.

   If the quorum device failed, use the –F Force option to remove the failed device.

   # clquorum remove -F qd1

   ---

   Note -  You can also place the node to be removed in maintenance state and then remove the quorum device with the clquorum remove quorum command. The clsetup cluster administration menu options are not available while the cluster is in install mode. See How to Put a Node Into Maintenance State and the clsetup(1CL) man page for more information.

   ---

3. Verify that the quorum device has been removed.

   # clquorum list -v

4. Depending on why you are removing the last quorum device, proceed with one of the following steps:
   • If you are replacing the quorum device that has been removed, complete the following substeps:
     1. Add the new quorum device.

        See Adding a Quorum Device for instructions on adding the new quorum device.

     2. Remove the cluster from install mode.

        # cluster set -p installmode=disabled

   • If you are reducing your cluster to a single-node cluster, remove the cluster from install mode.

     # cluster set -p installmode=disabled

This example shows how to put the cluster in maintenance mode and remove the last remaining quorum device in a cluster configuration.

Place the cluster in install mode
# cluster set -p installmode=enabled

Remove the quorum device
# clquorum remove d3

Verify that the quorum device has been removed
# clquorum list -v
Quorum          Type
-------         ----
scphyshost-1    node
scphyshost-2    node
scphyshost-3    node

How to Replace a Quorum Device

Use this procedure to replace an existing quorum device with another quorum device. You can replace a quorum device with a similar device type, such as replacing a NAS device with another NAS device, or you can replace the device with a dissimilar device, such as replacing a NAS device with a shared disk.

The phys-schost# prompt reflects a global-cluster prompt. Perform this procedure on a global cluster.

This procedure provides the long forms of the Oracle Solaris Cluster commands. Most commands also have short forms. Except for the long and short forms of the command names, the commands are identical.

1. Configure a new quorum device.

   You need to first add a new quorum device to the configuration to take the place of the old device. See Adding a Quorum Device to add a new quorum device to the cluster.

2. Remove the device that you are replacing as a quorum device.

   See How to Remove a Quorum Device to remove the old quorum device from the configuration.

3. If the quorum device is a failed disk, replace the disk.

   Refer to the hardware procedures in your hardware manual for your disk enclosure. See also the Oracle Solaris Cluster Hardware Administration Manual.