Setting up majority-based I/O fencing using installer

Last published : Sep 11, 2026
You can configure majority-based fencing for the cluster using the installer .
Perform the following steps to confgure majority-based I/O fencing
  1. Start the installer with the -fencing option.
    \# /opt/VRTS/install/installer  -fencing
    Where version is the specific release version. The installer starts with a copyright message and verifies the cluster information.
    Note: Make a note of the log file location which you can access in the event of any issues with the configuration process.
    1. Confirm that you want to proceed with the I/O fencing configuration at the prompt. The program checks that the local node running the script can communicate with remote nodes and checks whether VCS is configured properly.
    2. Review the I/O fencing configuration options that the program presents. Type 3 to configure majority-based I/O fencing.
    Select the fencing mechanism to be configured in this
    Application Cluster [1-7,b,q] 3
Note: The installer will ask the following question. Does your storage environment support SCSI3 PR? Input 'y' if your storage environment supports SCSI3 PR. Other alternative will result in installer configuring non-SCSI3 fencing(NSF).
  1. The installer then populates the /etc/vxfenmode file with the appropriate details in each of the application cluster nodes.
    Updating /etc/vxfenmode file on sys1 ................... Done
    Updating /etc/vxfenmode file on sys2 ................... Done
    1. Review the output as the installer stops and restarts the VCS and the fencing processes on each application cluster node, and completes the I/O fencing configuration.
    2. Note the location of the configuration log files, summary files, and response files that the installer displays for later use.
    3. Verify the fencing configuration.
    \# vxfenadm -d