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

To verify that the nodes see the same disks
1
Verify the connection of the shared storage for data to two of the nodes on
which you installed SF Oracle RAC.
2
From node A, enter the following command:
# vxfenadm -i /dev/vx/rdmp/c2t13d0
Vendor id : EMC
Product id : SYMMETRIX
Revision : 5567
Serial Number : 42031000a
The same serial number information should appear when you enter the
equivalent command on node B using the /dev/vx/rdmp/c2t11d0 path.
On a disk from another manufacturer, Hitachi Data Systems, the output is
different and may resemble:
# vxfenadm -i /dev/vx/rdmp/c2t1d0
Vendor id : HITACHI
Product id : OPEN-3 -HP
Revision : 0117
Serial Number : 0401EB6F0002
Refer to the vxfenadm(1M) manual page for more information.
About the vxfenclearpre utility
You can use the vxfenclearpre utility to remove SCSI-3 registrations and
reservations on the disks.
See “Removing preexisting keys” on page 119.
This utility currently does not support server-based fencing. You must manually
resolve any preexisting split-brain with server-based fencing configuration.
See “Issues during fencing startup on SF Oracle RAC cluster nodes set up for
server-based fencing” on page 212.
Removing preexisting keys
If you encountered a split-brain condition, use the vxfenclearpre utility to remove
SCSI-3 registrations and reservations on the coordinator disks as well as on the
data disks in all shared disk groups.
119Administering SF Oracle RAC and its components
Administering I/O fencing