NFS client reports I/O error because of network split brain

Last published : Sep 18, 2026
When network split brain occurs, the failing node may take some time to panic. As a result, the service group on the failover node may fail to come online as some of the resources (such as IP resource) are still online on the failing node. The disk group on the failing node may also get disabled but IP resource on the same node continues to be online.
Workaround: Configure the preonline trigger for the service groups containing DiskGroup resource with reservation on each system in the service group:
  1. Copy the preonline_ipc trigger from /opt/VRTSvcs/bin/sample_triggers/VRTSvcs to /opt/VRTSvcs/bin/triggers/preonline/ as T0preonline_ipc:
    \# cp /opt/VRTSvcs/bin/sample_triggers/VRTSvcs/preonline_ipc
    /opt/VRTSvcs/bin/triggers/preonline/T0preonline_ipc
    1. Enable the preonline trigger for the service group.
    \# hagrp -modify \<group_name\> TriggersEnabled
    PREONLINE -sys \<node_name\>