VERITAS Volume Manager 4.1 Administrator's Guide

Administering Dynamic Multipathing (DMP)
Path Failover Mechanism
Chapter 3114
Path Failover Mechanism
The DMP feature of VxVM enhances system reliability when used with multiported disk
arrays. In the event of the loss of one connection to the disk array, DMP automatically selects
the next available I/O path for I/O requests dynamically without action from the
administrator.
DMP is also informed when you repair or restore a connection, and when you add or remove
devices after the system has been fully booted (provided that the operating system recognizes
the devices correctly).