VERITAS Volume Manager 4.1 Administrator's Guide

Administering Dynamic Multipathing (DMP)
Disabling and Enabling Multipathing for Specific Devices
Chapter 3 125
As a result of this operation, disks that return VendorID:ProductID matching
the specified combination will be made visible to VxVM again.
VxVM INFO V-5-2-1407 You can specify a VID:PID combination at the prompt. Th
e specification can be as follows:
VID:PID where VID stands for Vendor ID
PID stands for Product ID
(The command vxdmpinq in /etc/vx/diag.d can be used to obtain the Vendor ID
and Product ID)
Both VID and PID can have an optional ’*’ (asterisk) following them.
If a ’*’ follows VID, it will result in the inclusion of all disks returning
Vendor ID starting with VID. The same is true for Product ID as well. Both
VID and PID should be non NULL. The maximum allowed lengths for Vendor ID an
d Product ID are 8 and 16 characters respectively.Some examples of VID:PID s
pecification are:
all - Include all disks
aaa:123 - Include all disks having VID ‘aaa’ and PID ‘123’
aaa*:123 - Include all disks having VID starting with ‘aaa’ and PID ‘123’
aaa:123* - Include all disks having VID ‘aaa’ and PID starting with ‘123’
aaa:* - Include all disks having VID ‘aaa’ and any PID
Enter a VID:PID combination:[<pattern>,all,list,list-exclude,q,?]
All disks returning the specified Vendor ID and Product ID combination are
made visible to VxVM.
• Select option 4 to remove 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.
Remove a pathgroup definition
Menu: VolumeManager/Disk/IncludeDevices/PATHGROUP-VXVM
Use this operation to remove the definition of pathgroup. Specify the serial
numbers of the pathgroups at the prompt. This can be obtained by typing
list-exclude at the prompt.
Enter pathgroup number(s):[<number>,list-exclude,q,?]
• Select option 5 to enable multipathing for all disks that have paths through the s
pecified controller.
NOTE This option requires a reboot of the system.