Setting up I/O fencing
Symantec recommends you to set up the I/O fencing feature to prevent data corruption in the event of a communication breakdown in the cluster. Make sure that you do the following before you set up I/O fencing:
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Install a version of Veritas Volume Manager (VxVM) that supports SCSI-3 persistent reservations.
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Verify that the disks you intend to use for shared data storage and for coordinator disks support SCSI-3 PR (Persistent Reservations).
See Setting up I/O fencing.
