I/O fencing requirements

Last published : Sep 11, 2026
Depending on whether you plan to configure disk-based fencing or server-based fencing, make sure that you meet the requirements for coordination points:
  • Coordinator disks
See Coordinator disk requirements for I/O fencing.
  • CP servers
See CP server requirements.
To configure disk-based fencing or to configure server-based fencing with at least one coordinator disk, make sure a version of Volume Manager (VxVM) that supports SCSI-3 persistent reservations (SCSI-3 PR) is installed on the VCS cluster.
See the InfoScale InfoScale® Installation Guide.
If you have installed InfoScale Enterprise in a virtual environment that is not SCSI-3 PR compliant, review the requirements to configure non-SCSI-3 fencing.
See Non-SCSI-3 I/O fencing requirements.