Sun Cluster Software Installation Guide for Solaris OS

ProcedureHow to Configure Quorum Devices

Note –

You do not need to configure quorum devices in the following circumstances:

Instead, proceed to How to Verify the Quorum Configuration and Installation Mode.

Perform this procedure one time only, after the cluster is fully formed. Use this procedure to assign quorum votes and then to remove the cluster from installation mode.

Before You Begin

If you intend to configure a Network Appliance network-attached storage (NAS) device as a quorum device, do the following:

  1. If you want to use a shared SCSI disk as a quorum device, verify device connectivity to the cluster nodes and choose the device to configure.

    1. From one node of the cluster, display a list of all the devices that the system checks.

      You do not need to be logged in as superuser to run this command.

      % scdidadm -L

      Output resembles the following:

      1       phys-schost-1:/dev/rdsk/c0t0d0 /dev/did/rdsk/d1
      2       phys-schost-1:/dev/rdsk/c1t1d0 /dev/did/rdsk/d2
      2       phys-schost-2:/dev/rdsk/c1t1d0 /dev/did/rdsk/d2
      3       phys-schost-1:/dev/rdsk/c1t2d0 /dev/did/rdsk/d3
      3       phys-schost-2:/dev/rdsk/c1t2d0 /dev/did/rdsk/d3
    2. Ensure that the output shows all connections between cluster nodes and storage devices.

    3. Determine the global device-ID name of each shared disk that you are configuring as a quorum device.

      Note –

      Any shared disk that you choose must be qualified for use as a quorum device. See Quorum Devices for further information about choosing quorum devices.

      Use the scdidadm output from Step a to identify the device–ID name of each shared disk that you are configuring as a quorum device. For example, the output in Step a shows that global device d2 is shared by phys-schost-1 and phys-schost-2.

  2. Become superuser on one node of the cluster.

  3. Start the scsetup(1M) utility.

    # scsetup

    The Initial Cluster Setup screen is displayed.

    Note –

    If the Main Menu is displayed instead, initial cluster setup was already successfully performed. Skip to Step 8.

  4. Answer the prompt Do you want to add any quorum disks?.

    • If your cluster is a two-node cluster, you must configure at least one shared quorum device. Type Yes to configure one or more quorum devices.

    • If your cluster has three or more nodes, quorum device configuration is optional.

      • Type No if you do not want to configure additional quorum devices. Then skip to Step 7.

      • Type Yes to configure additional quorum devices. Then proceed to Step 5.

  5. Specify what type of device you want to configure as a quorum device.

    • Choose scsi to configure a shared SCSI disk.

    • Choose netapp_nas to configure a Network Appliance NAS device.

  6. Specify the name of the device to configure as a quorum device.

    For a Network Appliance NAS device, also specify the following information:

    • The name of the NAS device

    • The LUN ID of the NAS device

  7. At the prompt Is it okay to reset "installmode"?, type Yes.

    After the scsetup utility sets the quorum configurations and vote counts for the cluster, the message Cluster initialization is complete is displayed. The utility returns you to the Main Menu.

  8. Quit the scsetup utility.

Next Steps

Verify the quorum configuration and that installation mode is disabled. Go to How to Verify the Quorum Configuration and Installation Mode.


Interrupted scsetup processing — If the quorum setup process is interrupted or fails to be completed successfully, rerun scsetup.

Changes to quorum vote count — If you later increase or decrease the number of node attachments to a quorum device, the quorum vote count is not automatically recalculated. You can reestablish the correct quorum vote by removing each quorum device and then add it back into the configuration, one quorum device at a time. For a two-node cluster, temporarily add a new quorum device before you remove and add back the original quorum device. Then remove the temporary quorum device. See the procedure “How to Modify a Quorum Device Node List” in Chapter 5, Administering Quorum, in Sun Cluster System Administration Guide for Solaris OS.