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

register with disks-m
make a reservation with disks-n
remove registrations made by other systems-p
read reservations-r
remove registrations-x
Refer to the vxfenadm(1m) manual page for a complete list of the command options.
About the I/O fencing registration key format
The keys that the vxfen driver registers on the data disks and the coordinator
disks consist of eight bytes. The key format is different for the coordinator disks
and data disks.
The key format of the coordinator disks is as follows:
76543210Byte
nID 0xnID 0xcID 0xcID 0xcID 0xcID 0xFVValue
where:
■ VF is the unique identifier that carves out a namespace for the keys (consumes
two bytes)
■ cID 0x is the LLT cluster ID in hexadecimal (consumes four bytes)
■ nID 0x is the LLT node ID in hexadecimal (consumes two bytes)
The vxfen driver uses this key format in both scsi3 mode and customized mode
of I/O fencing.
The key format of the data disks that are configured as failover disk groups under
VCS is as follows:
76543210Byte
SCVA+nIDValue
where nID is the LLT node ID
For example: If the node ID is 1, then the first byte has the value as B (‘A’ + 1 = B).
The key format of the data disks configured as parallel disk groups under CVM is
as follows:
115Administering SF Oracle RAC and its components
Administering I/O fencing