How to Remove a Quorum Device

You can also accomplish this procedure by using the SunPlex Manager GUI. See the SunPlex Manager online help for more information.

When a quorum disk 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, scconf(1M) will fail to remove the device from the configuration.

Note - If the device you intend to remove is the last quorum device in the cluster, see the procedure How to Remove the Last Quorum Device From a Cluster.

1. Become superuser on any node in the cluster.

2. Determine the quorum device to be removed.

   # scconf -pv | grep Quorum

   
   

3. Execute the scsetup(1M) utility.

   # scsetup

   
   

   The Main Menu is displayed.

4. To work with the quorum device, type 1 (Quorum).

5. To remove the quorum device, type 2 (Remove a quorum disk).

   Answer the questions displayed during the removal process.

6. Quit scsetup.

7. Verify that the quorum device is removed.

   # scstat -q

   
   

Example--Removing a Quorum Device

This example shows how to remove a quorum device from a cluster with two or more quorum devices configured.

Become superuser on any node and place the node to be removed in maintenance state.
[Determine the quorum device to be removed:]
# scconf -pv | grep Quorum
[Execute the scsetup utility:]
# scsetup
Select Quorum>Remove a quorum disk.
Answer the questions when prompted.
[Verify that the scconf command completed successfully:]
 
scconf -r -q globaldev=d4
 
    Command completed successfully.
Quit the scsetup Quorum Menu and Main Menu.
[Verify the quorum device is removed:]
# scstat -q
 
-- Quorum Summary --
 
  Quorum votes possible:      3
  Quorum votes needed:        2
  Quorum votes present:       3
 
-- Quorum Votes by Node --
 
                    Node Name           Present Possible Status
                    ---------           ------- -------- ------
  Node votes:       phys-schost-1       1        1       Online
  Node votes:       phys-schost-2       1        1       Online
 
-- Quorum Votes by Device --
 
                 Device Name         Present Possible Status
                 -----------         ------- -------- ------
  Device votes:  /dev/did/rdsk/d3s2  1        1       Online

How to Remove the Last Quorum Device From a Cluster

If the device you intend to remove is not the last quorum device in the cluster, use the previous procedure, How to Remove a Quorum Device.

Note - All two-node clusters require at least one configured quorum device. If this is the last quorum device on a two-node cluster, the cluster must be placed into install mode before scconf(1M) allows you to remove the device from the configuration. This should only be done if a node is being removed from the cluster.

1. Become superuser on any node in the cluster and place the node to be removed in maintenance state.

   See How to Put a Node Into Maintenance State.

2. Place the cluster in install mode.

   # scconf -c -q installmode

   
   

3. Remove the quorum device using the scconf command.

   The scsetup(1M) cluster-administration menu options are not available while the cluster is in install mode.

   # scconf -r -q globaldev=device

   
   

4. Verify that the quorum device has been removed.

   # scstat -q

   
   

Example--Removing the Last Quorum Device

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

[Become superuser on any node.]
[Place the cluster in install mode:]
# scconf -c -q installmode
[Remove the quorum device:]
# scconf -r -q globaldev=d3
[Verify the quorum device has been removed:]
# scstat -q
 
-- Quorum Summary --
 
  Quorum votes possible:      2
  Quorum votes needed:        2
  Quorum votes present:       2
 
-- Quorum Votes by Node --
 
                    Node Name           Present Possible Status
                    ---------           ------- -------- ------
  Node votes:       phys-schost-1       1        1       Online
  Node votes:       phys-schost-2       1        1       Online
 
-- Quorum Votes by Device --
 
                    Device Name         Present Possible Status
                    -----------         ------- -------- ------