Solaris I/O multipathing (MPxIO), which was formerly named Sun StorEdge Traffic Manager, is fully integrated in the Solaris Operating System I/O framework. Solaris I/O multipathing enables you to represent and manage devices that are accessible through multiple I/O controller interfaces within a single instance of the Solaris operating system.
The Solaris I/O multipathing architecture provides the following features:
Protection against I/O outages due to I/O controller failures
Automatic switches to an alternate controller upon an I/O controller failure
Increased I/O performance by load balancing across multiple I/O channels