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

About administering I/O fencing
The I/O fencing feature provides the following utilities that are available through
the VRTSvxfen depot:
Tests hardware for I/O fencing
See “About the vxfentsthdw utility” on page 106.
vxfentsthdw
Configures and unconfigures I/O fencing
Checks the list of coordinator disks used by the vxfen driver.
vxfenconfig
Displays information on I/O fencing operations and manages
SCSI-3 disk registrations and reservations for I/O fencing
See “About the vxfenadm utility” on page 114.
vxfenadm
Removes SCSI-3 registrations and reservations from disks
See “About the vxfenclearpre utility” on page 119.
vxfenclearpre
Replaces coordinator points without stopping I/O fencing
See “About the vxfenswap utility” on page 122.
vxfenswap
Generates the list of paths of disks in the diskgroup. This
utility requires that Veritas Volume Manager is installed and
configured.
vxfendisk
The I/O fencing commands reside in the /opt/VRTS/bin folder. Make sure you
added this folder path to the PATH environment variable.
Refer to the corresponding manual page for more information on the commands.
About the vxfentsthdw utility
You can use the vxfentsthdw utility to verify that shared storage arrays to be used
for data support SCSI-3 persistent reservations and I/O fencing. During the I/O
fencing configuration, the testing utility is used to test a single disk. The utility
has other options that may be more suitable for testing storage devices in other
configurations. You also need to test coordinator disk groups.
See Veritas Storage Foundation for Oracle RAC Installation and Configuration
Guide to set up I/O fencing.
The utility, which you can run from one system in the cluster, tests the storage
used for data by setting and verifying SCSI-3 registrations on the disk or disks
you specify, setting and verifying persistent reservations on the disks, writing
data to the disks and reading it, and removing the registrations from the disks.
Administering SF Oracle RAC and its components
Administering I/O fencing
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