Preparing to configure I/O fencing
Make sure you performed the following tasks before configuring I/O fencing for VCS:
Install the correct operating system.
Install the VRTSvxfen depot when you installed VCS.
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Install a version of Veritas Volume Manager (VxVM) that supports SCSI-3 persistent reservations (SCSI-3 PR).
Refer to the installation guide that comes with the Storage Foundation product that you use.
Perform the following preparatory tasks to configure I/O fencing: