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

To enable multipathing and make devices visible to VxVM
1
Run the vxdiskadm command, and select Allow multipathing/Unsuppress
devices from VxVM’s view from the main menu. You are prompted to
confirm whether you want to continue.
2
Select the operation you want to perform from the following options:
Unsupresses all paths through the specified controller from the
view of VxVM.
Option 1
Unsupresses specified paths from the view of VxVM.Option 2
Unsupresses disks from the view of VxVM that match a specified
Vendor ID and Product ID combination.
Option 3
Removes a pathgroup definition. (A pathgroup explicitly defines
alternate paths to the same disk.) Once a pathgroup has been
removed, all paths that were defined in that pathgroup become
visible again.
Option 4
Allows multipathing of all disks that have paths through the
specified controller.
Option 5
Allows multipathing of a disk by VxVM.Option 6
Allows multipathing of disks that match a specified Vendor ID
and Product ID combination.
Option 7
Lists the devices that are currently suppressed or not
multipathed.
Option 8
Enabling and disabling I/O for controllers and storage
processors
DMP allows you to turn off I/O for a controller or the array port of a storage
processor so that you can perform administrative operations. This feature can be
used for maintenance of HBA controllers on the host, or array ports that are
attached to disk arrays supported by VxVM. I/O operations to the controller or
array port can be turned back on after the maintenance task is completed. You
can accomplish these operations using the vxdmpadm command provided with
VxVM.
For Active/Active type disk arrays, after disabling the I/O through an HBA
controller or array port, the I/O continues on the remaining paths. For
Active/Passive type disk arrays, if disabling I/O through an HBA controller or
149Administering Dynamic Multipathing
Enabling and disabling I/O for controllers and storage processors