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Setting up I/O fencing for SF Oracle RAC

Choose Configure SFRAC > Configure I/O fencing from the configuration program's menu to configure the I/O fencing feature. The program presents guidelines to set up I/O fencing in SF Oracle RAC. Make sure you checked the I/O fencing disks before you set up I/O fencing.

See Checking shared disks for I/O fencing

I/O fencing requires coordinator disks that are configured in a disk group and accessible to each node in the cluster. These disks enables the vxfen driver to resolve potential split-brain conditions and prevent data corruption. Review the description of I/O fencing and the role of coordinator disks.

See About I/O fencing

Tasks involved in setting up I/O fencing include:

• Verifying the SF Oracle RAC configuration
• Initializing disks
• Setting up coordinator disk groups
• Stopping SF Oracle RAC on all nodes
• Configuring /etc/vxfendg disk group for I/O fencing
• Updating /etc/vxfenmode file
• Starting I/O fencing
• Modifying VCS configuration to enable I/O fencing
• Starting SF Oracle RAC on all nodes
• Verifying I/O fencing configuration
• Removing permissions for communication