VERITAS Volume Manager 3.5 Administrator's Guide (September 2004)

Administering Dynamic Multipathing (DMP)
Disabling and Enabling Multipathing for Specific Devices
Chapter 3110
Disabling and Enabling Multipathing for
Specific Devices
You can use vxdiskadm menu options 17 and 18 to disable or enable
multipathing. These menu options also allow you to exclude devices from
or include devices in the view of VxVM. For more information, see
“Disabling Multipathing and Making Devices Invisible to VxVM” on
page 110 and “Enabling Multipathing and Making Devices Visible to
VxVM” on page 115.
Disabling Multipathing and Making Devices Invisible
to VxVM
NOTE Some of the operations described in this section require a reboot of the
system.
Select menu task 17 (Prevent multipathing/Suppress devices from
VxVM’s view) from the vxdiskadm main menu to prevent a device from
being multipathed by the VxVM DMP driver (vxdmp), or to exclude a
device from the view of VxVM:
Step 1. At the following prompt, confirm that you want to continue:
Exclude Devices
Menu: VolumeManager/Disk/ExcludeDevices
This operation might lead to some devices being suppressed from VxVM’s view or
prevent them from being multipathed by vxdmp (This operation can be reversed
using the vxdiskadm command).
Do you want to continue ? [y,n,q,?] (default: y)
Step 2. Select the operation you want to perform from the displayed list:
Exclude Devices
Menu: VolumeManager/Disk/ExcludeDevices
1 Suppress all paths through a controller from VxVM’s view
2 Suppress a path from VxVM’s view
3 Suppress disks from VxVM’s view by specifying a VID:PID combination