VERITAS Volume Manager 4.1 Administrator's Guide

Administering Dynamic Multipathing (DMP)
Disabling and Enabling Multipathing for Specific Devices
Chapter 3118
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 118 and “Enabling Multipathing and Making Devices Visible to VxVM” on page 123.
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 ca
n 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
4 Suppress all but one paths to a disk
5 Prevent multipathing of all disks on a controller by VxVM
6 Prevent multipathing of a disk by VxVM
7 Prevent multipathing of disks by specifying a VID:PID combination
8 List currently suppressed/non-multipathed devices
? Display help about menu
?? Display help about the menuing system