Veritas Storage Foundation 5.1 SP1 Cluster File System Administrator"s Guide (5900-1738, April 2011)

Migrating from disk-based to server-based fencing in an online cluster

You can migrate between disk-based fencing and server-based fencing without

incurring application downtime in the Storage Foundation Cluster File System

HA clusters.

You can migrate from disk-based fencing to server-based fencing in the following

cases:

■ You want to leverage the benefits of server-based fencing.

■ You want to replace faulty coordinator disks with CP servers.

Similarly, you can migrate from server-based fencing to disk-based fencing when

you want to perform maintenance tasks on the CP server systems.

See “Migrating from server-based to disk-based fencing in an online cluster”

on page 113.

To migrate from disk-based fencing to server-based fencing

Make sure system-to-system communication is functioning properly.

Make sure that the Storage Foundation Cluster File System HA cluster is

online and uses disk-based fencing.

# vxfenadm -d

For example, if Storage Foundation Cluster File System HA cluster uses

disk-based fencing:

I/O Fencing Cluster Information:

================================

Fencing Protocol Version: 201

Fencing Mode: SCSI3

Fencing SCSI3 Disk Policy: dmp

Cluster Members:

* 0 (galaxy)

1 (nebula)

RFSM State Information:

node 0 in state 8 (running)

node 1 in state 8 (running)

Make sure that you performed the following tasks on the designated CP server:

■ Preparing to configure the new CP server.

■ Configuring the new CP server

■ Preparing the new CP server for use by the SFCFS cluster

111Administering Storage Foundation Cluster File System and its components

Administering I/O Fencing