About I/O fencing components
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About I/O fencing components

The shared storage for VCS must support SCSI-3 persistent reservations to enable I/O fencing. VCS involves two types of shared storage:

Data disks

Store shared data

Coordination points

Act as a global lock during membership changes

I/O fencing in VCS involves coordination points and data disks. Each component has a unique purpose and uses different physical disk devices. The fencing driver, known as vxfen, directs VxVM as necessary to carry out actual fencing operations at the disk group level.

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