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

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In some cases, if the master switching operation is interrupted with another
reconfiguration operation, the master change fails. In this case, the existing master
remains the master of the cluster. After the reconfiguration is complete, reissue
the vxclustadm setmaster command to change the master.
If the master switching operation has started the reconfiguration, any command
that initiates a configuration change fails with the following error:
Node processing a master-switch request. Retry operation.
If you see this message, retry the command after the master switching has
completed.
Importing a shared disk group manually
You can use the following command to manually import a shared disk group:
# vxdg -s import dg_name
Deporting a shared disk group manually
You can use the following command to manually deport a shared disk group:
# vxdg deport dg_name
Note that the deport of a shared disk group removes the SCSI-3 PGR keys on the
disks. It also removes the ‘shared’ flag on the disks.
Evaluating the state of CVM ports
CVM kernel (vxio driver) uses port ‘v’ for kernel messaging, port ‘w’ for vxconfigd
communication between the cluster nodes, and port 'u' for shipping commands
from the slave node to the master node. The following command displays the state
of CVM ports:
# gabconfig -a | egrep "Port [vwu]"
Verifying if CVM is running in an SF Oracle RAC cluster
You can use the following options to verify whether CVM is up or not in an SF
Oracle RAC cluster.
The following output is displayed on a node that is not a member of the cluster:
Administering SF Oracle RAC and its components
Administering CVM
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