VERITAS Volume Manager 4.1 Administrator's Guide

Administering Dynamic Multipathing (DMP)
How DMP Works
Chapter 3 113
Figure 3-2 Example of Multipathing for a Disk Enclosure in a SAN
Environment
See “Changing the Disk-Naming Scheme” on page 78 for details of how to change the naming
scheme that VxVM uses for disk devices.
NOTE The operation of DMP relies on the vxdmp device driver. Unlike prior releases,
from VxVM 3.1.1 onwards, the vxdmp driver must always be present on the
system.
See “Configuring Newly Added Disk Devices” on page 68 for a description of how to make
newly added disk hardware known to a host system.
Host
Fibre Channel
Hubs/Switches
Disk Enclosure enc0
enc0_0
DMP
VxVM
Mapped by DMP
c1t99d0 c2t99d0
c2c1
Disk is c1t99d0 or
c2t99d0