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

■ Initialize the new disks as VxVM disks.
■ Check the disks for I/O fencing compliance.
■ Add the new disks to the coordinator disk group and set the coordinator
attribute value as "on" for the coordinator disk group.
See the Veritas Storage Foundation for Oracle RAC Installation and
Configuration Guide for detailed instructions.
Note that though the disk group content changes, the I/O fencing remains in
the same state.
7
From one node, start the vxfenswap utility. You must specify the diskgroup
to the utility.
The utility performs the following tasks:
■ Backs up the existing /etc/vxfentab file.
■ Creates a test file /etc/vxfentab.test for the diskgroup that is modified on
each node.
■ Reads the diskgroup you specified in the vxfenswap command and adds
the diskgroup to the /etc/vxfentab.test file on each node.
■ Verifies that the serial number of the new disks are identical on all the
nodes. The script terminates if the check fails.
■ Verifies that the new disks can support I/O fencing on each node.
8
If the disk verification passes, the utility reports success and asks if you want
to commit the new set of coordinator disks.
9
Review the message that the utility displays and confirm that you want to
commit the new set of coordinator disks. Else skip to step 10.
Do you wish to commit this change? [y/n] (default: n) y
If the utility successfully commits, the utility moves the /etc/vxfentab.test
file to the /etc/vxfentab file.
10
If you do not want to commit the new set of coordinator disks, answer n.
The vxfenswap utility rolls back the disk replacement operation.
Replacing the coordinator diskgroup in a cluster that is online
You can also replace the coordinator diskgroup using the vxfenswap utility. The
following example replaces the coordinator disk group vxfencoorddg with a new
disk group vxfendg.
125Administering SF Oracle RAC and its components
Administering I/O fencing