Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

Enabling I/O for paths, controllers or array ports
Enabling a controller allows a previously disabled path, HBA controller or array
port to accept I/O again. This operation succeeds only if the path, controller or
array port is accessible to the host, and I/O can be performed on it. When
connecting Active/Passive disk arrays, the enable operation results in failback
of I/O to the primary path. The enable operation can also be used to allow I/O to
the controllers on a system board that was previously detached.
Note: From release 5.0 of VxVM, this operation is supported for controllers that
are used to access disk arrays on which cluster-shareable disk groups are
configured.
To enable I/O for a path, use the following command:
# vxdmpadm enable path=path_name
To enable I/O for multiple paths, use the following command:
# vxdmpadm enable path=path_name1,path_name2,path_nameN
To enable I/O for the paths connected to an HBA controller, use the following
command:
# vxdmpadm enable ctlr=ctlr_name
To enable I/O for the paths connected to an array port, use one of the following
commands:
# vxdmpadm enable enclosure=enclr_name portid=array_port_ID
# vxdmpadm [-f] enable pwwn=array_port_WWN
where the array port is specified either by the enclosure name and the array port
ID, or by the array port’s worldwide name (WWN) identifier.
The following are examples of using the command to enable I/O on an array port:
# vxdmpadm enable enclosure=HDS9500V0 portid=1A
# vxdmpadm enable pwwn=20:00:00:E0:8B:06:5F:19
Upgrading disk controller firmware
You can upgrade disk controller firmware without performing a system reboot
or unloading the VxVM drivers.
183Administering Dynamic Multipathing
Administering DMP using vxdmpadm