Symantec 5 manual Workflow to configure disk-based I/O fencing

90Configuring VCS clusters for data integrity About setting up disk-based I/O fencing

Figure 5-1 Workflow to configure disk-based I/O fencing

Preparing to set up I/O fencing

Initialize disks as VxVM disks

Identify disks to use as coordinator disks

Check shared disks for I/O fencing compliance

Setting up I/O fencing

Set up coordinator disk group

Create I/O fencing configuration files

Modify VCS configuration to use I/O fencing

Verify I/O fencing configuration

See “Preparing to configure disk-based I/O fencing” on page 92.

See “Setting up disk-based I/O fencing manually” on page 99.

I/O fencing requires the coordinator disks be configured in a disk group. The coordinator disks must be accessible to each node in the cluster. These disks enable the vxfen driver to resolve potential split-brain conditions and prevent data corruption.

Review the following requirements for coordinator disks:

■You must have three coordinator disks.

The coordinator disks can be raw devices, DMP devices, or iSCSI devices. You must use DMP disk policy for iSCSI-based coordinator disks.