Veritas Storage Foundation 5.1 SP1 for Oracle RAC Administrator"s Guide (5900-1512, April 2011)

You can also use the vxfenswap utility to migrate between the disk-based and the
server-based fencing without incurring application downtime in the SF Oracle
RAC cluster.
See “Migrating from disk-based to server-based fencing in an online cluster”
on page 61.
See “Migrating from server-based to disk-based fencing in an online cluster”
on page 63.
If the vxfenswap operation is unsuccessful, then you can use the -a cancel of
the vxfenswap command to manually roll back the changes that the vxfenswap
utility does.
■ For disk-based fencing, use the vxfenswap -g diskgroup -a cancel command
to cancel the vxfenswap operation.
You must run this command if a node fails during the process of disk
replacement, or if you aborted the disk replacement.
■ For server-based fencing, use the vxfenswap -a cancel command to cancel
the vxfenswap operation.
Replacing I/O fencing coordinator disks when the cluster is
online
Review the procedures to add, remove, or replace one or more coordinator disks
in a cluster that is operational.
Warning: The cluster might panic if any node leaves the cluster membership before
the vxfenswap script replaces the set of coordinator disks.
123Administering SF Oracle RAC and its components
Administering I/O fencing