Veritas Storage Foundation 5.1 SP1 Cluster File System Installation Guide (5900-1510, April 2011)

Symantec recommends that you use three disks as coordination points
for disk-based I/O fencing.
■ Enter the numbers corresponding to the disks that you want to use as
coordinator disks.
■ Enter the disk group name.
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Verify that the coordinator disks you chose meet the I/O fencing requirements.
You must verify that the disks are SCSI-3 PR compatible using the vxfentsthdw
utility and then return to this configuration program.
See “Checking shared disks for I/O fencing” on page 151.
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After you confirm the requirements, the program creates the coordinator
disk group with the information you provided.
The program also does the following:
■ Populates the /etc/vxfendg file with this disk group information
■ Populates the /etc/vxfenmode file on each cluster node with the I/O fencing
mode information and with the SCSI-3 disk policy information
8
Verify and confirm the I/O fencing configuration information that the installer
summarizes.
9
Review the output as the configuration program does the following:
■ Stops VCS and I/O fencing on each node.
■ Configures disk-based I/O fencing and starts the I/O fencing process.
■ Updates the VCS configuration file main.cf if necessary.
■ Copies the /etc/vxfenmode file to a date and time suffixed file
/etc/vxfenmode-date-time. This backup file is useful if any future fencing
configuration fails.
■ Starts VCS on each node to make sure that the Storage Foundation Cluster
File System is cleanly configured to use the I/O fencing feature.
10
Review the output as the configuration program displays the location of the
log files, the summary files, and the response files.
11
Configure the Coordination Point agent to monitor the coordinator disks.
See “Configuring Coordination Point agent to monitor coordination points”
on page 177.
Configuring SFCFS for data integrity
Setting up disk-based I/O fencing using installsfcfs
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